Being an unsaturated acid it combines directly with hydrochloric acid, hydrobromic acid, bromine, &c. On nitration it gives a mixture of ortho and para nitrocinnamic acids, the former of which is of historical importance, as by converting it into orthonitrophenyl propiolic acid A.
The diazo group takes up the para position with regard to the hydroxyl group, and if this be prevented it then goes into the ortho position.
Bamberger (Ber., 1900, 33, p. 3189) simultaneously with the para compound, from which it may be separated by distillation in a current of steam, the ortho compound passing over with the steam.
H 3 C CO NH 3 CO CH 3 H3C C - NH - C CH3 On nitration it yields chiefly meta-nitro-benzaldehyde, crystallizing in needles which melt at 58° C. The ortho-compound may be obtained by oxidizing ortho-nitrocinnamic acid with alkaline potassium permanganate in the presence of benzene; or from ortho - nitrobenzyl chloride by condensing it with aniline, oxidizing the product so obtained to ortho-nitrobenzylidine aniline, and then hydrolysing this compound with an acid (Farben fabrik d.
Meyer (Ber., 18 94, 2 7, p. 510 et seq.) showed that in benzenoid compounds ortho-substituents exert a great hindering effect on the esterification of alcohols by acids in the presence of hydrochloric acid, this hindering being particularly marked when two substituents are present in the ortho positions to the carboxyl group. In such a case the ester is best prepared by the action of an alkyl halide on the silver salt of the acid, and when once prepared, can only be hydrolysed with great difficulty.
Many ortho and, para-compounds of the aromatic series (for example, the brom-phenols, benzene para-disulphonic acid) also yield resorcin on fusion with caustic potash.
NH2 R -NH NH- -> -NH- or R -NH- NH2 R Ortho - semidine.
The mixture can be separated by shaking with sulphuric acid, whereupon the ortho and meta forms are converted into soluble sulphonic acids, the para form being soluble only in concentrated acid; the ortho and meta acids may be separated by crystallization of their salts or sulphonamides.
Decker (Ber., 9 5, 38, p. 1144) has found that many ortho substituted quinolines will not combine with methyl iodide owing to steric hindrance, but the difficulty can be overcome in most cases by using methyl sulphate and heating the reaction components to ioo C. for half an hour.
On nitration it gives orthoand para-nitrotoluenes - which on reduction yield the valuable toluidines, C6H4(CH3)(NH2) - and on sulphonation the parasulphonic acid is formed with a little of the ortho acid.
There are three isomers: (1) ortho, or phthalic acid; (2) meta, or isophthalic acid; (3) para, or terephthalic acid.
It also results on the oxidation of ortho xxi.
Write down the possible nuclear spin states for H 2 and hence calculate the nuclear spin degeneracy of ortho and para-H 2.
Phosphorus can exist as poly, ortho or organic phosphorus can exist as poly, ortho or organic phosphorus.
A similar depression is presented by methyl alcohol (67Ã‚°) and methyl ether (-23 Ã‚°) Among the aromatic di-substitution derivatives the ortho compounds have the highest boiling-point, and the meta boil at a higher, or about the same temperature as the para compounds.
Chem., 1896, 21, p. 355; Ber., 1900, 33, p. 1302)examined the questionfromthe physico-chemical standpoint by determining the freezing-point depressions, the result being that the para-oxyazo compounds give abnormal depressions and the ortho-oxyazo compounds give normal depressions; Auwers then concluded that the para compounds are phenolic and the ortho compounds are quinone hydrazones or act as such.
H 3 C CO NH 3 CO CH 3 H3C C - NH - C CH3 On nitration it yields chiefly meta-nitro-benzaldehyde, crystallizing in needles which melt at 58Ã‚° C. The ortho-compound may be obtained by oxidizing ortho-nitrocinnamic acid with alkaline potassium permanganate in the presence of benzene; or from ortho - nitrobenzyl chloride by condensing it with aniline, oxidizing the product so obtained to ortho-nitrobenzylidine aniline, and then hydrolysing this compound with an acid (Farben fabrik d.
Systems free of this aberration are called " ortho scopic " (ipgos, right, r ' 0-K071-6 1/, to look) .
In this month's interview, we spoke with Sabrina Zohar, the "It Girl" for Ortho Tri-Cyclen Lo and a fundraiser for the Invisible Children Organization in Uganda.
I learned about the It Girl campaign after I was prescribed to Ortho Tri-Cyclen Lo.
Two products that do this are Ortho Weed B Gone by Scotts and RoundUp.
The Whatnot book is inhabited by a Wizard named Ortho.
Get guidance from the Wizard Ortho, who resides in the Whatnot Book.
Glyphosate-based herbicides like Roundup and triclopyr-based herbicides like Ortho Brush-B-Gon will kill poison plants, but they can also take out any other surrounding foliage they come into contact with.
The birth control patch, sold under the brand name Ortho Evra, is made by Ortho-McNeil Pharmaceutical, Inc. It contains progestin and estrogen, which are the same hormones found in birth control pills.
Information about side effects is available on the Ortho Evra web site.
In 2002, birth control pill manufacturer Ortho teamed up with fashion designer Nicole Miller to create a beautiful alternative to boring old plastic birth control compacts.
Other fashionable Ortho designs include Fuchsia Daisy, Expressions, Onyx, and Lapis.
Unfortunately, these beautiful birth control cases are no longer available from Ortho.
However, Ortho is offering a nice alternative.
Birth control pills such as Errin, Ortho Micronor, and Ovrette contain no estrogen, only progestin.
Women who suffer from acne might find the best birth control pills to be Yaz, Estrostep, and Ortho Tri-Cyclen.
This birth control pill category features several well-known brands, including Alesse, Ortho Tri-Cyclen, Ortho-Novum, Yaz and Yasmin.
Acne sufferers may want to choose a pill that has a higher estrogen amount, such as Yasmin, Yaz, or Ortho Tri-Cyclen.
He assumed that if we have one atom 1 It is now established that ortho compounds do exist in isomeric forms, instances being provided by chlor-, brom-, and amino-toluene, chlorphenol, and chloraniline; but arguments, e.g.
A similar depression is presented by methyl alcohol (67°) and methyl ether (-23 °) Among the aromatic di-substitution derivatives the ortho compounds have the highest boiling-point, and the meta boil at a higher, or about the same temperature as the para compounds.
QUINONES, in organic chemistry, a group of compounds in which two hydrogen atoms of a benzene nucleus are replaced by two oxygen atoms. This replacement may take place either in the ortho or para positions, giving rise to orthoquinones or to paraquinones; metaquinones do not appear to have been isolated.
Somewhat later, they found that it could be prepared from diazobenzene imide, provided a nitro group were present in the ortho or para position to the diazo group. The para-nitro compound is dropped slowly into a cold solution of one part of caustic potash in ten parts of absolute alcohol; the solution becomes dark red in colour and is then warmed for two days on the water bath.
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