C-2 sentence example

c-2
  • Again, Kew is surrounded by a large park, not devoid of trees, and hardly the place where Exner's theory would suggest a large value for C2, and yet the summer value of c 2 at Kew is the largest in Table V.
    0
    0
  • Stein tuned Mozart's piano to a fork a' 421.6, and the Broadwood pianos used at the London Philharmonic Society in its first concerts (1813) were tuned to a fork c 2 506.8, which gives a mean tone a' 423.7.
    0
    0
  • 1670 C.Meerens,proposed standard derived from c 2 512, and favoured by Boito and other Italian musicians.
    0
    0
  • FULMINIC ACID, Hcno or H 2 C 2 N 2 0 2, an organic acid isomeric with cyanic and cyanuric acids; its salts, termed fulminates, are very explosive and are much employed as detonators.
    0
    0
  • The following formulae are important: N - CH C =CH/ - CH CH2 CH CH C/ NH CH / N CH2 N / N / N% CH CH H3C CH2 N-fl-Pyridylpyrrol, a0-pyridylpyrrol, nicotine.
    0
    0
    Advertisement
  • ethylene dibromide) with silver acetate or with potassium acetate and alcohol, the esters so produced being then hydrolysed with caustic alkalis, thus: C 2 H 4 Br 2 + C2H302 Ag-*C2H4(O C2H30)2->C2H4(OH)2+2K C2H302 by the direct union of water with the alkylen oxides; by oxidation of the olefines with cold potassium permanganate solution (G.
    0
    0
  • O C 2 H 51 a liquid boiling at 172° C., may be obtained by similar methods.
    0
    0
  • Amongst endothermic compounds may be noted hydriodic acid, HI, acetylene, C 2 H 2, nitrous oxide, N 2 O, nitric oxide, NO, azoimide, N 3 H, nitrogen trichloride, NC1 3.
    0
    0
  • For example, ethylene, C2H4 j is formed with absorption of 16200 cal., acetylene, C 2 H 2, with absorption of 59100 cal., and liquid benzene, C 6 H 6, with absorption of 9100 cal.
    0
    0
  • Triacetin, C 3 H 5 (O C 2 H 3 0) 3, is apparently contained in cod-liver oil.
    0
    0
    Advertisement
  • Chromic acid oxidizes it to benzoic acid; zinc and acetic acid reduce it to cinnamic acid, C 6 H 5 CH:CH CO 2 H, whilst sodium amalgam reduces it to hydrocinnamic acid, C6H5 CH2 C02H.
    0
    0
  • It is often convenient to regard compounds as formed upon certain types; alcohol, for example, may be said to be a compound formed upon the water type, that is to say, a compound formed from water by displacing one of the atoms of hydrogen by the group of elements C 2 H 5, thus - H C2H5 O H O H Water Alcohol.
    0
    0
  • However, in 1833, Berzelius reverted to his earlier opinion that oxygenated radicals were incompatible with his electrochemical theory; he regarded benzoyl as an oxide of the radical C 14 H 1Q, which he named " picramyl " (from 7rucp6s, bitter, and &uvyalk, almond), the peroxide being anhydrous benzoic acid; and he dismissed the views of Gay Lussac and Dumas that ethylene was the radical of ether, alcohol and ethyl chloride, setting up in their place the idea that ether was a suboxide of ethyl, (C2H5)20, which was analogous to K 2 0, while alcohol was an oxide of a radical C 2 H 6; thus annihilating any relation between these two compounds.
    0
    0
  • By his own investigations and those of Sir Edward Frankland it was proved that the radical methyl existed in acetic acid; and by the electrolysis of sodium acetate, Kolbe concluded that he had isolated this radical; in this, however, he was wrong, for he really obtained ethane, C 2 H 6, and not methyl, CH 3.
    0
    0
  • Thus the radical of acetic acid, acetyl,' was C 2 H 3 C 2.
    0
    0
    Advertisement
  • Thus ethane gives H3C CH2 CH3, propane; ethylene gives H 2 C:CH CH 3, propylene; and acetylene gives HC: C CH 3, allylene.
    0
    0
  • CH(CH3) CH2 CH31 from isobutane we may also derive two compounds, one identical with (2), and a new one (3) CH 3 (CH 3)C(CH 3)CH 3.
    0
    0
  • By fusing two nuclei we obtain the formula of naphthalene, C 1 oH 8; by fusing three, the hydrocarbons anthracene and phenanthrene, C14H10; by fusing four, chrysene, C18H12, and possibly pyrene, C16H1n; by fusing five, picene, C22 H 14.
    0
    0
  • Somewhat similar condensations are: of geranial or citral, (CH 3) 2 CH CH 2 CH :CH C(CH 3) :CH CHO, to p-isopropylmethylbenzene or cymene; of the condensation product of methylethylacrolein and acetone, CH3 CH2 CH:C(CH3) CH:CH CO CH3, to [1.3.
    0
    0
  • Certain a-diketones condense to form benzenoid quinones, two molecules of the diketone taking part in the reaction; thus diacetyl, CH 3 CO CO CH 3, yields p-xyloquinone, C 6 H 2 (CH 3) 2 0 2 (Ber., 1888, 21, p. 1411), and acetylpropionyl, CH 3 CO CO C 2 H 5, yields duroquinone, or tetramethylquinone, C 6 (CH 3) 4 0 2, Oxymethylene compounds, characterized by the grouping > C:CH(OH), also give benzene derivatives by hydrolytic condensation between three molecules; thus oxymethylene acetone, or formyl acetone, CH 3 CO.
    0
    0
    Advertisement
  • CH :CH (OH), formed by acting on formic ester with acetone in the presence of sodium ethylate, readily yields [1.3.51-triacetylbenzene, C 6 H 3 (CO CH 3) 3; oxymethylene acetic ester or formyl acetic ester or ß-oxyacrylic ester, (HO)CH :CH CO 2 C 2 H 51 formed by condensing acetic ester with formic ester, and also its dimolecular condensation product, coumalic acid, readily yields esters of [1.3.
    0
    0
  • OH COOH,when acetoneoxalic ester, CH 3 CO CH 2 CO CO CO 2 C 2 H 5, is boiled with baryta (Ber., 1889, 22, p. 3271).
    0
    0
  • C T CI ?OH CI " N O Cl OH _Cl OH C1 2 Nz0 C12 C C Ciz C1 2 Clt Cit (r) (2) (3) (4) CCI /CH2 CU CI C 'CO H CH ?C02H CI C. t 'c% CCI t CH3 (5) (6) 0 C1 /N C1 2 ClZ',C12 NzO C12 (2) CI (3) HO 2 C [[Ccichc1 Cc1 2 Co Cc13 - (6) Ho 2 C Ccichci]] CCl?
    0
    0
  • The compounds so obtained, alicyclic-,-tetrahydronaphthylamine and alicyclic-atetrahydronaphthol, closely resemble f3-aminodiethylbenzene, C 6 H 4 (C 2 H C 2 H 4 NH 2, and 3-oxydiethylbenzene,C 6 H 4 (C 2 H 5) C2H40H.
    0
    0
  • Knorr, by the action of ammonia on aceto-acetic ester, obtained (3-imidobutyric ester, which with nitrous acid yields a-isonitroso-(3-imidobutyric ester, CH 3 C(:NH) C(:N OH) CO 2 C 2 H 5.
    0
    0
    Advertisement
  • Ethyl salicylate, C 6 H 4 (OH) CO 2 C 2 H 5j is obtained by boiling salicylic acid with alcohol and a little sulphuric acid, or by dropping an alcoholic solution of salicylic acid into 13-naphthalene sulphonic acid at a temperature of 140-150° C. (German Patent 76,574).
    0
    0
  • It is a liquid, smelling like fusel oil and boiling at 108.4° C. Methyl ethyl carbinol, CH 3 C 2 H 5 CHOH, is the secondary alcohol derived from nbutane.
    0
    0
  • Wallach (Ann., 1900, 312, p. 171) has shown that the saturated cyclic ketones yield oximes which by an application of the Beckmann reaction are converted into isoximes, and these latter on hydrolysis with dilute mineral acids are transformed into acyclic amino-acids; thus from cyclohexanone, e-amidocaproic acid (e-leucine) may be obtained: CH2" C NOH C CH 2 CH 2 7: ?12?CH2 CH2 NH /CH2 CH2 C02H CH2', An ingenious application of the fact that oximes easily lose the elements of water and form nitriles was used by A.
    0
    0
  • COO H +0 = C 2 H 6 +2 CO 2 +H20.
    0
    0
  • When the solutions may be taken as effectively dilute, so that the gas laws apply to the osmotic pressure, this relation reduces to E _ nrRT to c1 ey gE c2 where n is the number of ions given by one molecule of the salt, r the transport ratio of the anion, R the gas constant, T the absolute temperature, y the total valency of the anions obtained from one molecule, and c i and c 2 the concentrations of the two solutions.
    0
    0
    Advertisement
  • We consider the quantic to have any n number of equivalent representations a- b n -c n So that a 1 -k a 2 = b l -k b 2 - c 1 -k c 2 = ...
    0
    0
  • may be the same or different, it is necessary that every product of umbrae which arises in the expansion of the symbolic product be of degree n, in a l, a 2; in the case of b,, b 2 of degree n 2; in the case of c 1, c 2 of degree n3; and so on.
    0
    0
  • (II.) Similarly in (I.), writing for c l, c 2 the cogredicnt pair -y2, +y1, we obtain axb5-a5bx=(ab)(xy)..
    0
    0
  • (ii.) By means of the commutative law we can collect like terms of a monomial, numbers being regarded as like terms. Thus the above expression is equal to 6a 5 bc 2, which is, of course, equal to other expressions, such as 6ba 5 c 2.
    0
    0
  • + (n - 2) (n - 3) c 2 x n - 4 +...
    0
    0
    Advertisement
  • + j ncox�-' + (n - I) clxn-2 + (n - 2) c 2 x n - 3 +...
    0
    0
  • (19), 1 abA) ' ' we may write 12= (cos 27rv 2 .dv) 2 + (f sin zirv 2 .dv) 2 (20), or, according to our previous notation, 12 = (2 - C 2 +(z - Sv)2= G2 +H2 Now in the integrals represented by G and H every element diminishes as V increases from zero.
    0
    0
  • Soc., 1904, 20, p. 15) has used silicon halides with the Grignard reagent: C2H,MgBr(+SiC14)-C2HiSiC13(-1-MgBrPh)--> Ph C 2 H 1.
    0
    0
  • Potassium percarbonate, K 2 C 2 0 6, is obtained in the electrolysis of potassium carbonate at -10 to -15°.
    0
    0
  • - Employ the elliptic coordinates n,, and -=n+Vi, such that z=cch?, cchncos,y=cshnsin-; (1) then the curves for which n and are constant are confocal ellipses and hyperbolas, and -d(n,) =c 2 (ch 2 n - cost) = 2c 2 (ch2n-cos2) = r i r 2 = OD 2, (2) if OD is the semi-diameter conjugate to OP, and ri, r 2 the focal distances, rl,r2 = c (ch n cos 0; r 2 = x2 +y2 = c 2 (ch 2 n - sin20 = 1c 2 (ch 2 7 7 +cos 2?).
    0
    0
    Advertisement
  • x+yi =c1,1 [sin(+ 7 ni)] (17) i ' =Qc sh((n-a)sin((E-,6) (18) 'will give motion streaming past the fixed cylinder n = a, and dividing along t =43; and then x 2 -3/ 2 = c 2 sin ch n, 2xy = c 2 cos sh n.
    0
    0
  • d t dy dz where _ oo abcdA A, B ' C ' - (a 2 +A, b 2 ±x, A, c 2 +A) P P 2 = 4(a 2 -F-A) (b 2 ±A) (c2+A).
    0
    0
  • In a state of steady motion d4- 121 _S22 Tit °' - fl 4=1G = nt, suppose, S21 -F9,277 = S2co, d4 a2+c2 WI- 1 a2-c2S21' _ 2a 2 SZ dt a2+c2cos' a 2 + c 2 a, 2 a 2 S2 I- a2_c22--a2+C2,0, 1a2 c2)2 (a 2 -c 2) (9a2-c2) ?
    0
    0
  • with A' =0 over the surface of the paraboloid; and then' = ZU[y 2 - pJ (x2 + y2) + px ]; (9) =-2U p [1/ (x2 + y2)-x]; (io) 4, = - ZUp log [J(x2+y2)+x] (II) The relative path of a liquid particle is along a stream line 1,L'= 2Uc 2, a constant, (12) = /,2 3, 2 _ (y 2 _ C 2) 2 2 2 2' - C2 2 x 2p(y2 - c2) /' J(x2 +y 2)= py ` 2p(y2_c2)) (13) a C4; while the absolute path of a particle in space will be given by dy_ r - x _ y 2 - c2 dx_ - y - 2py y 2 - c 2 = a 2 e -x 1 46.
    0
    0
  • well as of the body from the vector OF to O'F' requires an impulse couple, tending to increase the angle F00', of magnitude, in sec. foot-pounds F.00'.sin FOO'=FVt sin (0-0), (4) equivalent to an incessant couple N=FV sin (0-0) = (F sin 0 cos 0-F cos 0 sin ¢)V = (c 2 -c i) (V /g) sin 0 cos 4) =W'(13-a)uv/g (5) This N is the couple in foot-pounds changing the momentum of the medium, the momentum of the body alone remaining the same; the medium reacts on the body with the same couple N in the opposite direction, tending when c 2 -c 1 is positive to set the body broadside to the advance.
    0
    0
    Advertisement
  • An oblate flattened body, like a disk or plate, has c 2 -c 1 negative, so that the medium steers the body axially; this may be verified by a plate dropped in water, and a leaf or disk or rocket-stick or piece of paper falling in air.
    0
    0
  • An elongated body like a ship has c 2 -c 1 positive, and the couple N tends to disturb the axial movement and makes it unstable, so that a steamer requires to be steered by constant attention at the helm.
    0
    0
  • (9) (io) (II) F 2 (X 2 +Y 2) = y12+y22 +y32G2, c 2 - c 1 +a u2 h W c2 g = (?
    0
    0
  • (9) c 2 Ci If the shot is moving as if fired from a gun of calibre d inches, in which the rifling makes one turn in a pitch of n calibres or nd inches, so that the angle S of the rifling is given by tan S = ird/nd = 2 d p/u, (10) '°If a denotes the density of the metal, and if the shell has a cavity homothetic with the external ellipsoidal shape, a fraction f of the linear scale; then the volume of a round shot being sird 3, and sird 3 x of a shot x calibres long W =*ird 3 x(I -f 3)v, (20) 2 Wki 2= 61rd 3 xo(I-f 5)Q, (21) Wk22=67rd3x 2 2+0 2(I - f5)Q.
    0
    0
  • which is the ratio of the linear velocity of rotation 2dp to u, the velocity of advance, -T2 d2 C 22 tans = n 2 = 4 = (c 2 - Ct) cg C12 2 W!
    0
    0
    Advertisement
  • ZI /t = - (a - s) M'Q 2 sine cos ° - EQ sin() =[ - (a - (3)M'U+E]V (8) Now suppose the cylinder is free; the additional forces acting on the body are the components of kinetic reaction of the liquid - aM' (Ç_vR), - (3M' (-- E -FUR), - EC' dR, (9) so that its equations of motion are M (Ç - vR) _ - aM' (_vR) - (a - $) M'VR, (io) M (Ç+uR) = - OM' (dV+U R) - (a - ()M'UR - R, '(II) C dR = dR + (a - Q)M'UV+0V; (12) and putting as before M+aM'=ci, M+13M' = c2, C+EC'=C3, ci dU - c2VR=o, dV +(c1U+E)R=o, c 3 dR - (c 1 U+ - c 2 U)V =o; showing the modification of the equations of plane motion, due to the component E of the circulation.
    0
    0
  • The integral of (14) and (15) may be written ciU+E=Fcoso, c 2 V= - Fsino, dx F cost o F sinz o 71 = U cos o - V sin o = cl + c c ic os o, chi = U sine +V coso= (F - F) sin cos o - l sino, (19) c i 2 2 2 sin o cos o - l ?
    0
    0
  • Curtius, Ber., 18 94, 2 7, p. 779; 1896, 29, p. 1166), N2H4�H20 HONO R�Cooh-R�COOR' -- R�CONH�NH 2 - > acid ester hydrazide C 2 H50H HCI R.
    0
    0
  • The aqueous solution of the amines is now shaken up with diethyl oxalate, when the primary amine forms a crystalline dialkyl oxamide and the secondary amine an insoluble liquid, which is an ethyl dialkyl oxamate, the tertiary amine not reacting: (C02C2H5)2+ 2NH 2 R = (CO�NHR) 2 -{- 2C 2 H S OH; (CO 2 C 2 H 5) 2 -}- NHR 2 = C 2 H S O 2 C�Conr 2 -1-C 2 H S Oh.
    0
    0
  • Again, anode reactions, such as are observed in the electrolysis of the fatty acids, may be utilized, as, for example, when the radical CH3C02 - deposited at the anode in the electrolysis of acetic acid - is dissociated, two of the groups react to give one molecule of ethane, C 2 H 6, and two of carbon dioxide.
    0
    0
  • It is therefore apparent that a mixed salt and ester, for example KO 2 C�CH 2 �CH 2 �CO 2 C 2 H 5, would give only two ions, viz.
    0
    0
  • If a solution of potassium acetate be electrolysed the products are ethane, carbon dioxide, potash and hydrogen; in a similar manner, normal potassium succinate gives ethylene, carbon dioxide, potash and hydrogen; these reactions may be represented: CH 3 �CO 2;K CH 3 CO 2 K' CH 2 �CO 2 1K CH 2 CO 2 K' --> I + + I I -i iI + CH 3 �CO 21 K CH 3 CO 2 K' CH 2 �CO 2 iK CH 2 CO 2 K' By electrolysing a solution of potassium ethyl succinate, KO 2 C�(CH 2) 2 CO 2 C 2 H 5, the KO 2 C� groups are split off and the two residues �(CH 2) 2 CO 2 C 2 H 5 combine to form the ester (CH2)4(C02C2H5)2.
    0
    0
  • Hence the density v is given by 47rabc (x2/a4+y2/b4-I-z2/c4), and the potential at the centre of the ellipsoid, and therefore its potential as a whole is given by the expression, adS Q dS V f r 47rabc r' (x2/a4-I-y2/b4+z2/c4) Accordingly the capacity C of the ellipsoid is given by the equation 1 I J dS C 47rabc Y (x 2 +y 2 + z2) V (x2/a4+y2/b4+z2/c4) (5) It has been shown by Professor Chrystal that the above integral may also be presented in the form,' foo C 2 J o J { (a2 + X) (b +X) (c 2 + X) } (6).
    0
    0
  • Acetylene tetrabromide, C 2 H 2 Br 4, which is very conveniently prepared by passing acetylene into cooled bromine, has a density of 3 ooi at 6° C. It is highly convenient, since it is colourless, odourless, very stable and easily mobile.
    0
    0
  • The same observer considers Boghead coal, kerosene shale and similar substances used for the production of mineral oils to be mainly alteration products of gelatinous fresh water algae, which by a nearly complete elimination of oxygen have been changed to substances approximating in composition to C 2 H 3 and C 3 H 5, where C: H = 7.98 and C: O ±N = 46.3.
    0
    0
  • ACETYLENE, klumene or ethine, a gaseous compound of carbon and hydrogen, represented by the formula C 2 H 2.
    0
    0
  • CaC2 -}- H 2 O = C 2 H 2 -}- CaO Lime.
    0
    0
  • (5) If c is the resultant velocity of a molecule, so that c 2 =u2+v2+w2, it is readily found from formula (4) that the number of molecules of the first kind of which the resultant velocity lies between c and c+dc is 4lrs1,l (h 3 rn 3 17r 3)e hmc2 c 2 dc. (6) These formulae express the " law of distribution of velocities " in the normal state: the law is often called Maxwell's Law of Distribution.
    0
    0
  • If we use c 1 to represent the chord of the whole arc, c 2 the chord of half the arc, and c 4 the chord of one quarter of the arc, then corresponding to (i) and (iii) of § 70 or § 79 we have a (8c 2 - c i) and4 5 (256c 4 - 40c2+ci) as approximations to the length of the arc. The first of these is Huygens's rule.
    0
    0
  • CH 3C2H5 CH CO N C CH :C - CH2 - CH CH2/0
    0
    0
  • For the simplest case of polarized waves travelling parallel to the axis of x, with the magnetic oscillation y along z and the electric oscillation Q along y, all the quantities are functions of x and t alone; the total current is along y and given with respect to our moving axes by __ (d_ d Q+vy d K-1 Q, dt dx) 47rc 2 + dt (4?rc 2) ' also the circuital relations here reduce to _ dydQ _dy _ dx 47rv ' _ dt ' d 2 Q dv dx 2 -417t giving, on substitution for v, d 2 Q d 2 Q d2Q (c2-v2)(7372 = K dt 2 2u dxdt ' For a simple wave-train, Q varies as sin m(x-Vt), leading on substitution to the velocity of propagation V relative to the moving material, by means of the equation KV 2 + 2 uV = c 2 v2; this gives, to the first order of v/c, V = c/K i - v/K, which is in accordance with Fresnel's law.
    0
    0
  • CH: CH 2; isopropylethylene, (CH 3) 2 CH CH: CH 2; symmetrical methyl-ethyl-ethylene, CH 3 CH: CH C 2 H 5; unsymmetrical methyl-ethyl-ethylene, (CH 3)(C 2 H 5)C:CH 2 i and trimethyl ethylene, (CH3)2C:CH(CH3).
    0
    0
  • It Is Also Formed When Sulphur Trioxide Reacts With Carbon Bisulphide At 100° C., Cs2 3S03 =Cos 4So 2, And By The Decomposition Of Ethyl Potassium Thiocarbonate With Hydrochloric Acid, Co(0C2115)Sk Hc1= Cos Kc1 C 2 H 5 Oh.
    0
    0
  • Nef to be divalent, since these substances readily form addition compounds, such addition taking place on the carbon atom, as is shown by the products of hydrolysis; for example with ethyl carbylamine: C 2 H 5 NC -FCH 3 C0C1--> C 2 H 5 NC(00CH 3)CI -->HCI -{- C2H5NH3 -fCH3CO C02H.
    0
    0
  • The reactions may probably be represented as follows: C 2 H5NC+C 2 H51+4C2H50H=C2H5NH2 HI+HC02C2H5+2 (C2H5)20, C 2 H 5 NC C2H5N(C2H5 I)C(+3C2H50H) -> (C 2 H 5) 2 NH HI-{- H C02C2H5 + (C2H5)20.
    0
    0
  • The above compounds may be represented as: CH 2 -CH--CH COOH CH 2 -CH-CH'COOH CH2-CH-CH'COOH N'CH3 CH'OH I N 'CH3 C H N CH3 CH2 CH 2 -CH-CH 2 CH2-CH---CH CH2 - C H-CH2 Ecgonine Anhydroecgonine Hydroecgonidine
    0
    0
  • - Data: radius=a; 0= circular measure of angle subtended at centre by arc; c = chord of arc; c 2 = chord of semi-arc; c 4 = chord of quarter-arc.
    0
    0
  • If h be given, we can use c 2 +4h 2 =8ah, zh =c tan 4B to determine 0.
    0
    0
  • will be equal to 4AB CD; by the same process find a point C2 such that the rectangle B 1 C 2 will be equal to 1B C I; and so on ad infinitum.
    0
    0
  • ETHYL, in chemistry, the name given to the alkyl radical C 2 H 5.
    0
    0
  • The compounds containing this radical are treated under other headings; the hydride is better known as ethane, the alcohol, C 2 H 5 OH, is the ordinary alcohol of commerce, and the oxide (C 2 H 5) 2 O is ordinary ether.
    0
    0
  • Benzene-azoethane, C 6 H 5 N 2 C 2 H 5, is a yellow oil which boils at about 180 C. with more or less decomposition.
    0
    0
  • The vapour of chloroform when passed through a red-hot tube yields hexachlorbenzene C 6 C1 6, perchlorethane C,C1 6, and some perchlorethylene C 2 C1 4 (W.
    0
    0
  • de la soc. chim., 1888, 5 o, p. 357), 2C 2 H S 0001--> C 2 H 5 CO.
    0
    0
  • CH(CH3) 0001 -> C 2 H 5 CO.
    0
    0
  • Manasse, Ber., 1888, 21, p. 2177), C2H5 CO C :(NOH) CH 3 -I-11C5HONO = C 2 H 5 CO.
    0
    0
  • Perkin, junr., Ber., 1884, 1 7, p. 451): - C6H4 < CH2Br + Na C(C02R)2 - 7Cs H4 C CH2 C(C02R)2 CH 2 Br Na C(C02R)2 CH2 C(C02R)2 C 10 1-1 8 E - CeH9?CH2 CH C02H Cs H4`CH2 C(C02H)2 CH 2 CH CO 2 H CH2 C(C02H)2 1 "Nape," the back of the neck, is of doubtful origin; it may be a variant of "knap," a knob or protuberance.
    0
    0
  • The first aliphatic diazo compound to be isolated was diazoacetic ester, CH N2 CO 2 C 2 H 5 i which is prepared by the action of potassium nitrite on the ethyl ester of glycocoll hydrochloride,HCl NH2 CH2 C02C2H 5 -1-KNO 2 =CHN 2 CO 2 C 2 H 5+ KCI+2H 2 O.
    0
    0
  • The constitution of the diazo fatty esters is inferred from the fact that the two nitrogen atoms, when split off, are replaced by two monovalent elements or groups, thus leading to the formula N >CH CO 2 C 2 H 5, for diazoacetic ester.
    0
    0
  • iroXb, many) was chosen for compounds like butylene, C 4 H 8, and ethylene, C 2 H 4, corresponding to the same composition in weight but differing in molecular formula, and having different densities in gas or vapour, a litre of butylene and isobutylene weighing, for instance, under ordinary temperature and pressure, about 2.5 gr., ethylene only one-half as much, since density is proportional to molecular weight.
    0
    0
  • in the difference between C - C - C - C C-C-C and With this compound C 4 H 10, named butane, C isomerism is actually observed, being limited to a pair, whereas the former members ethane, C 2 H 6, and propane, C 3 H 8, showed no isomerism.
    0
    0
  • CH 3 CO CHX CO 2 C 2 H 5, derivatives of acetoacetic ester.
    0
    0
  • as if containing the OH group; this leads to the formula H 3 C C(OH): CX CO 2 C 2 H 5.
    0
    0
  • The substance investigated was acetaldehyde, C 2 H 4 O, in its relation to paraldehyde, a polymeric modification.
    0
    0
  • "R' `R' R" /OMgBr /OMgBr R, H CO 2 C 2 H 5 H C - OC2H5 --->H C-R' R,>CH OH.
    0
    0
  • Ethyl formate, H CO 2 C 2 H 5, boils at 55° C. and has been used in the artificial preparation of rum.
    0
    0
  • We thus obtain the equation C 2 R 0 (i +ao)/1 =-d(gkdo/dx)/dx+hpo+gcdo/dt+sCdo/dx.
    0
    0
  • If the current C is chosen so that C 2 R ° a = hpl, the external heat-loss is compensated by the variation of resistance with temperature.
    0
    0
  • If the dimensions of the bar are suitably chosen, the distribution of temperature is always very nearly parabolic, so that it is not necessary to determine the value of the critical current C 2 = hpllaRo very accurately, as the correction for external loss is a small percentage in any case.
    0
    0
  • Neglecting the external heat-loss, and the variation of the thermal and electric conductivities k and k', we obtain, as before, for the difference of temperature between the centre and ends, the equation O, Tho z Go = C 2 R1/8qk = ECl/8qk = E 2 k'/8k, (11) where E is the difference of electric potential between the ends.
    0
    0
  • Geuther, Ann., 1880, 202, p. 306), C 2 H 5 ONa+CH 3 000Na+CO = H CO 2 Na+CH 3 CH 2 CH 2 COONa.
    0
    0
  • By direct union with glycocoll acid, it yields glycocyamine, NH2 (HN): C NH CH 2 CO 2 H, whilst with methyl glycocoll (sarcosine) it forms creatine, NH2 (NH): C N(CH3) CH2 C02H.
    0
    0
  • They Also Indicate That It Is Much Larger, And Increases Considerably With Rise Of Temperature, In The Case Of More Condensible Vapours, Such As C1 2J Br 2, Or More Complicated Molecules, Such As Co 2, N 2 0, Nh 3, C 2 H 4.
    0
    0
  • ETHYL CHLORIDE, or Hydrochloric Ether, C 2 H 5 C1, a chemical compound prepared by passing dry hydrochloric acid gas into absolute alcohol.
    0
    0
  • Wolffenstein, 1899, p. 2 534); by the hydrolysis of succinonitrile (from ethylene dibromide) C 2 H 4 - >C 2 H 4 Br 2 --*C 2 H 4 (CN) 2 - >C 2 H 4 (CO 2 H) 2; by the hydrolysis of 0-cyanpropionic ester; and by the condensation of sodioinalonic ester with monochloracetic ester and hydrolysis of the resulting ethane tricarboxylic ester (R02C)2CH CH2 C02R; this method is applicable to the preparation of substituted succinic acids.
    0
    0
  • Succinyl chloride, obtained by the action of phosphorus pentachloride on succinic acid, is a colourless liquid which boils at 190° C. In many respects it behaves as though it were dichlorbutyro-lactone, /CC12 C 2 He >O; e.g.
    0
    0
  • Succinic anhydride, C 2 H 4 (CO) 2 0, is obtained by heating the acid or its sodium salt with acetic anhydride; by the action of acetyl chloride on the barium salt; by distilling a mixture of succinic acid and succinyl chloride, or by heating succinyl chloride with anhydrous oxalic acid.
    0
    0
  • Succinamide, C 2 H 4(CONH2)2, best obtained by the action of ammonia on diethyl succinate, crystallizes in needles which melt at 242243° C., and is soluble in hot water.
    0
    0
  • The above types of compounds may be represented by the following formulae: - N = CH N =C(NH2) NH - CH2 CH2 C >O' > O, H 2 CH2 - CH 2 CH2 - CH2 oxazoline aminooxazoline oxazolidines.
    0
    0
  • The presence of the phenanthrene nucleus and the chain system CH 3 N C C follows from the fact that these alkaloids, by appropriate treatment, yield a substituted phenanthrene and also dimethylaminoethanol (CH3)2N CH2 CH20H.
    0
    0
  • B ovi to i t c 2 ig T.
    0
    0
  • g o?to $Wanage WrOx a Dunnosenklin G L Wetl Po Is rtland C C 2 D E LongitudeWest I of Greenwich Ca r ?billy J
    0
    0
  • The Cartesian equation to the caustic produced by reflection at a circle of rays diverging from any point was obtained by Joseph Louis Lagrange; it may be expressed in theform 1(4,2_ a2) (x 2+ y2) - 2a 2 cx - a 2 c 2 1 3 = 2 7 a4c2y2 (x2 + y2 - c2)2, where a is the radius of the reflecting circle, and c the distance of the luminous point from the centre of the circle.
    0
    0
  • The subject has been especially studied by Skraup, Konigs, and von Miller; Kiinigs and von Miller have proposed formulae consisting of a piperidine ring substituted with a vinyl group; in the former that is a bridge of CH 2 C(OH) from the nitrogen atom to the -y-carbon atom, connexion with the quinoline residue being made at the hydroxylic carbon atom through a CH2 group: whilst in the latter the piperidine ring is substituted by a methyl group in addition to the vinyl group and the bridge is simply C(OH), with which connexion is made as before.
    0
    0
  • Cl, Br, I,NH 3j N 2 0, N02, H 2 S, SO 2, CS2,, CH 4, C 2 H 4, inhibit the phosphorescence.
    0
    0
  • Water gives hydrochloric and phosphoric acids; dilute alcohol gives monoethyl phosphoric acid, C 2 H 5 H 2 PO 4, whilst absolute alcohol gives triethyl phosphate, (C 2 H 5) 3 PO 4.
    0
    0
  • POLYMETHYLENES, in chemistry, cyclic compounds, the simplest members of which are saturated hydrocarbons of general formula C 7, H 2nj where n may be r to 9, and known as tri-, tetra-, penta-, hexa-, and hepta-methylene, &c., or cyclo- propane, -butane, -pentane, -hexane, -heptane, &c.: - CH 21 CH 2 CH 2 CH2.CH2 CH2 CH2 CH2?C1H,, I I H ?
    0
    0
  • CH 2 CH-CH 2 CH2 CH-CH 2 CH2-CH-CH2 CH 2 NMe CO --> CH 2 NMe CH 2 ->CH 2 HO NMe 2 CH 2 -> CH 3 CH-C11 2 CH2 CH-CHs C H2C H-CH2 Pseudopelletierine N-methyl granatanine CH 2 CH-CH, CH, - CH-CH, CH2 CH:CH H2 NMe CH 2 4--CH 2 HO NMe 3 CH,4C H 2 CH H2 CH = CH CH 2 - CH =CH CH2 CH2 CH A - o des-methyl cyclo-octadiene granatanine Cyclo-octadiene, C8H12, as above prepared, is a strong-smelling oil which decolorizes potassium permanganate solution instantaneously.
    0
    0
  • The chief unsaturated hydrocarbons present in coal gas are: ethylene, C2H4, butylene, C 4 H 8, acetylene, C 2 H 2, benzene, C 6 H 61 and naphthalene,C 10 H 8, and the saturated hydrocarbons consist chieflyof methane, CH 4, and ethane, C2H6.
    0
    0
  • Ethane, C 2 H 6, in a similar manner, can only give rise to one alcohol, namely ethyl alcohol, CH 3 CH 2 OH, which is also primary.
    0
    0
  • [[Hooc Ch Nh2 Ch2 Cooc2h5h-Nh3 = C 2 H 5 Oh +H000 Ch]] NH2 CH2 CONH2.
    0
    0
  • Ethyl mercaptan, C 2 H 5 .SH, is a colourless liquid which boils at 36.2° C. It is used commercially in the preparation of sulphonal.
    0
    0
  • CO 2 H,with sodium amalgam, by conversion of trimethylene bromide into the cyanide and hydrolysis of this compound, or from acetoacetic ester, which, in the form of its sodium derivative, condenses with j3-iodopropionic ester to form acetoglutaric ester, CH 3 CO CH(CO 2 C 2 H 5) CH 2.
    0
    0
  • CH 2 CO 2 C 2 H 5, from which glutaric acid is obtained by hydrolysis.
    0
    0
  • Curtius found that benzoylglycollic acid gavebenzoyl hydrazine with hydrazine hydrate: C 6 H S 000 CH2000H -1-2N2H4 H20 = H20 +C6H 5CONH NH2+ NH2 NH CH2 COOH.
    0
    0
  • bicyclic ring junction, whilst that with C 2 symmetry has trans stereochemistry.
    0
    0
  • The molecular structure of an unusual cytochrome c 2 determined at 2.0?
    0
    0
  • The system with C s has cis stereochemistry at the bicyclic ring junction, whilst that with C 2 symmetry has trans stereochemistry.
    0
    0
  • The system with C s has cis stereochemistry at the bicyclic ring junction, whilst that with C 2 symmetry has trans stereochemistry at the bicyclic ring junction, whilst that with C 2 symmetry has trans stereochemistry.
    0
    0
  • It can be obtained by the oxidation of uric acid by means of lead dioxide, manganese dioxide, ozone or potassium permanganate: C 5 H 4 N 4 O 3 + H 2 O + O = C 4 H 6 N 4 O 3 + C02.
    0
    0
  • We learn that the light dispersed in the direction of primary vibration is not only of higher order in the difference of optical quality, but is also of order k 2 c 2 in comparison with that dispersed in other directions, where c is the radius of the sphere, and k=21r/X as before.
    0
    0
  • from the Bureau Central and the Eiffel Tower, and the reduction of e 2 at the latter station, are unquestionably significant facts; but the summer value for c 2 at Karasjok - a low level station - is nearly as small as that at the Eiffel Tower, and notably smaller than that at the Sonnblick (3100 metres).
    0
    0
  • It combines with sulphuretted hydrogen, in the .presence of water, to form the compound C 2 N 2 H 2 S, and in the presence of alcohol, to form the compound C 2 N 2.2H 2 S.
    0
    0
  • OH, and this latter compound on exposure to air takes up oxygen slowly, forming the compound B C 2 H 5.00 2 H 5.
    0
    0
  • If a battery of electromotive force E maintain a current C in a conductor, and no other electromotive force exist in the circuit, the whole of the work done will be converted into heat, and the amount of work done per second will be EC. If R denote the resistance of the whole circuit, E = CR, and the heat generated per second is C 2 R.
    0
    0
  • O C 2 H 51 a liquid boiling at 172° C., may be obtained by similar methods.
    0
    0
  • Thus the heat generated by the combustion of acetylene, C 2 H 2, is 316000 cal., whereas the heat of combustion of the carbon and hydrogen composing it is only 256900 cal., the difference being equal to the negative heat of formation of the acetylene.
    0
    0
  • CH :CH (OH), formed by acting on formic ester with acetone in the presence of sodium ethylate, readily yields [1.3.51-triacetylbenzene, C 6 H 3 (CO CH 3) 3; oxymethylene acetic ester or formyl acetic ester or ß-oxyacrylic ester, (HO)CH :CH CO 2 C 2 H 51 formed by condensing acetic ester with formic ester, and also its dimolecular condensation product, coumalic acid, readily yields esters of [1.3.
    0
    0
  • Many diketo compounds suffer condensation between two molecules to form hydrobenzene derivatives; thus a, 7 -di-acetoglutaric ester, C 2 H S O 2 C(CH 3 CO) CH CH 2 CH(CO CH 3)CO 2 C 2 H 5, yields a methylketohexamethylene,whiles-acetobutyric ester,CH 3 CO (CH2)2C02C2N5, is converted into dihydroresorcinol or m-diketohexamethylene by sodium ethylate; this last reaction is reversed by baryta (see Decompositions of Benzene Ring).
    0
    0
  • Ethyl salicylate, C 6 H 4 (OH) CO 2 C 2 H 5j is obtained by boiling salicylic acid with alcohol and a little sulphuric acid, or by dropping an alcoholic solution of salicylic acid into 13-naphthalene sulphonic acid at a temperature of 140-150° C. (German Patent 76,574).
    0
    0
  • It is a liquid, smelling like fusel oil and boiling at 108.4° C. Methyl ethyl carbinol, CH 3 C 2 H 5 CHOH, is the secondary alcohol derived from nbutane.
    0
    0
  • + j ncox�-' + (n - I) clxn-2 + (n - 2) c 2 x n - 3 +...
    0
    0
  • When, for instance, we find that the quotient, when 6+5x+7x2+13x1+5x4 is divided by 2+35+5 2, is made up of three terms+3, - 2x, and +5x 2, we are really obtaining successively the values of co, c 1, and c 2 which satisfy the identity 6+ 5x+ 7x 2 + 13x 3 + 5x4 = (co+c i x+c 2 x 2) (2+3x+5 2); and we could equally obtain the result by expanding the right-hand side of this identity and equating coefficients in the first three terms, the coefficients in the remaining terms being then compared to see that there is no remainder.
    0
    0
  • Potassium percarbonate, K 2 C 2 0 6, is obtained in the electrolysis of potassium carbonate at -10 to -15°.
    0
    0
  • 1 a +') - (121+52277)2] 4 - (a2+0)2 [L M -N2 { L 2c (a c 2 c 2) ae - N az+c2 l Y2 T L + 2 z 2 M (a2+c2) (9a2 - c2) 4 J 16c4 (a2-c2) = Z, where Z is a quadratic in ?
    0
    0
  • In a state of steady motion d4- 121 _S22 Tit °' - fl 4=1G = nt, suppose, S21 -F9,277 = S2co, d4 a2+c2 WI- 1 a2-c2S21' _ 2a 2 SZ dt a2+c2cos' a 2 + c 2 a, 2 a 2 S2 I- a2_c22--a2+C2,0, 1a2 c2)2 (a 2 -c 2) (9a2-c2) ?
    0
    0
  • Similarly, the inertia parallel to Oy and Oz is NW' - 1 B W', B C (b2 +-X, c 2 ab and A +C abc/ZP, Ao For a sphere a=b=c, Ao= Bo=Co =, 'a' = Q = = z, (9) U from (II), (16) so that the effective inertia of a sphere is increased by half the weight of liquid displaced; and in frictionless air or liquid the sphere, of weight W, will describe a parabola with vertical acceleration W - W', g (30) W+ aW Thus a spherical air bubble, in which W/W' is insensible, will begin to rise in water with acceleration 2g.
    0
    0
  • (9) c 2 Ci If the shot is moving as if fired from a gun of calibre d inches, in which the rifling makes one turn in a pitch of n calibres or nd inches, so that the angle S of the rifling is given by tan S = ird/nd = 2 d p/u, (10) '°If a denotes the density of the metal, and if the shell has a cavity homothetic with the external ellipsoidal shape, a fraction f of the linear scale; then the volume of a round shot being sird 3, and sird 3 x of a shot x calibres long W =*ird 3 x(I -f 3)v, (20) 2 Wki 2= 61rd 3 xo(I-f 5)Q, (21) Wk22=67rd3x 2 2+0 2(I - f5)Q.
    0
    0
  • ZI /t = - (a - s) M'Q 2 sine cos ° - EQ sin() =[ - (a - (3)M'U+E]V (8) Now suppose the cylinder is free; the additional forces acting on the body are the components of kinetic reaction of the liquid - aM' (Ç_vR), - (3M' (-- E -FUR), - EC' dR, (9) so that its equations of motion are M (Ç - vR) _ - aM' (_vR) - (a - $) M'VR, (io) M (Ç+uR) = - OM' (dV+U R) - (a - ()M'UR - R, '(II) C dR = dR + (a - Q)M'UV+0V; (12) and putting as before M+aM'=ci, M+13M' = c2, C+EC'=C3, ci dU - c2VR=o, dV +(c1U+E)R=o, c 3 dR - (c 1 U+ - c 2 U)V =o; showing the modification of the equations of plane motion, due to the component E of the circulation.
    0
    0
  • Curtius, Ber., 18 94, 2 7, p. 779; 1896, 29, p. 1166), N2H4�H20 HONO R�Cooh-R�COOR' -- R�CONH�NH 2 - > acid ester hydrazide C 2 H50H HCI R.
    0
    0
  • CON 3 --> R�NH�CO 2 C 2 H 5 - R.NH2 azide urethane The secondary amines are prepared, together with the primary and tertiary, by the action of ammonia on the alkyl iodides (see below), or by the hydrolysis of para-nitroso derivatives ` of tertiary aromatic amines, such as para-nitrosodimethylaniline, thus: NO�C 6 H 4 �N(CH 3) 2 � H 2 O = NO�C 6 H 4.
    0
    0
  • The aqueous solution of the amines is now shaken up with diethyl oxalate, when the primary amine forms a crystalline dialkyl oxamide and the secondary amine an insoluble liquid, which is an ethyl dialkyl oxamate, the tertiary amine not reacting: (C02C2H5)2+ 2NH 2 R = (CO�NHR) 2 -{- 2C 2 H S OH; (CO 2 C 2 H 5) 2 -}- NHR 2 = C 2 H S O 2 C�Conr 2 -1-C 2 H S Oh.
    0
    0
  • It is therefore apparent that a mixed salt and ester, for example KO 2 C�CH 2 �CH 2 �CO 2 C 2 H 5, would give only two ions, viz.
    0
    0
  • If a solution of potassium acetate be electrolysed the products are ethane, carbon dioxide, potash and hydrogen; in a similar manner, normal potassium succinate gives ethylene, carbon dioxide, potash and hydrogen; these reactions may be represented: CH 3 �CO 2;K CH 3 CO 2 K' CH 2 �CO 2 1K CH 2 CO 2 K' --> I + + I I -i iI + CH 3 �CO 21 K CH 3 CO 2 K' CH 2 �CO 2 iK CH 2 CO 2 K' By electrolysing a solution of potassium ethyl succinate, KO 2 C�(CH 2) 2 CO 2 C 2 H 5, the KO 2 C� groups are split off and the two residues �(CH 2) 2 CO 2 C 2 H 5 combine to form the ester (CH2)4(C02C2H5)2.
    0
    0
  • Acetylene tetrabromide, C 2 H 2 Br 4, which is very conveniently prepared by passing acetylene into cooled bromine, has a density of 3 ooi at 6° C. It is highly convenient, since it is colourless, odourless, very stable and easily mobile.
    0
    0
  • It Is Also Formed When Sulphur Trioxide Reacts With Carbon Bisulphide At 100° C., Cs2 3S03 =Cos 4So 2, And By The Decomposition Of Ethyl Potassium Thiocarbonate With Hydrochloric Acid, Co(0C2115)Sk Hc1= Cos Kc1 C 2 H 5 Oh.
    0
    0
  • 00 2 C 2 H 5, which is formed on passing nitrous fumes into an ethereal solution of methyl urethane).
    0
    0
  • Ethyl formate, H CO 2 C 2 H 5, boils at 55° C. and has been used in the artificial preparation of rum.
    0
    0
  • If the current C is chosen so that C 2 R ° a = hpl, the external heat-loss is compensated by the variation of resistance with temperature.
    0
    0
  • Succinyl chloride, obtained by the action of phosphorus pentachloride on succinic acid, is a colourless liquid which boils at 190° C. In many respects it behaves as though it were dichlorbutyro-lactone, /CC12 C 2 He >O; e.g.
    0
    0
  • Succinamide, C 2 H 4(CONH2)2, best obtained by the action of ammonia on diethyl succinate, crystallizes in needles which melt at 242243° C., and is soluble in hot water.
    0
    0
  • - a t;, c 2 8, 1111-1111nn111111111111111n11111?t111111111111U1111111Nt1111M w :::???NeC 1 1aY11119'LIm I11111Y11.
    0
    0
  • Kerp, Ann., 1896, 290, p. 123): CH2 C(CH3) 3CH3 CO CH3-(CHa)2C? ??CH CH 2 COQ by the condensation of succinic acid with sodium ethylate, followed by saponification and elimination of carbon dioxide:- 2C2H4(COzH) C 2 - H2 CH 2 CO CO.
    0
    0
  • Ethyl mercaptan, C 2 H 5 .SH, is a colourless liquid which boils at 36.2° C. It is used commercially in the preparation of sulphonal.
    0
    0
  • The real C 2 molecule is however a singlet ground state, i.e..
    0
    0
  • Super C22 has 22 different forms of vitamin C and 2,500 percent of the USRDA for the vitamin.
    0
    0