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isomer

isomer

isomer Sentence Examples

  • MANDELIC ACID (Phenylglycollic Acid), C 8 H 8 O 3 or C 6 H 5 CH(OH) COOH, an isomer of the cresotinic and the oxymethylbenzoic acids.

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    1
  • According to the above formula the critical temperature is given by 8aA/54b, and as the critical temperature is approximately proportional to the boiling-point, both being estimated on the absolute scale of temperature, we may conclude that the larger value of b corresponds to the lower boilingpoint, and indeed the isomer corresponding to the left-hand formula boils at 74°, the other at 114°.

    11
    6
  • An isomer of cinnamic acid known as allo-cinnamic acid is also known.

    10
    4
  • Phenazone is an isomer of phenazine, to which it bears the same relation that phenanthrene bears to anthracene.

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    9
  • Consequently, of each pair of isomers we may establish beforehand which is the more stable; either in particular circumstances, a direct change taking place, as, for instance, with maleic acid, which when exposed to sunlight in presence of a trace of bromine, yields the isomeric fumaric acid almost at once, or, indirectly, one may conclude that the isomer which forms under greater heat-development is the more stable, at least at lower temperatures.

    3
    1
  • By the addition of the diazonium salts to a hot concentrated solution of a caustic alkali, C. Schraube and C. Schmidt(Ber., 18 94, 2 7, p. 520)obtained an isomer of potassium benzene diazotate.

    3
    5
  • The remaining isomer, pivalic or trimethylacetic acid, (CH3)3C C02H, melts at 35° and boils at 163°.

    1
    0
  • Metaor iso-xylene, the most important isomer, may be prepared by nucleus-synthetic reactions, or by distilling mesitylenic acid, C 6 H 3 (CH 3) 2 CO 2 H, an oxidation product of mesitylene, C 6 H 3 (CH 3) 3, which is produced on the condensation of acetone, with lime; this reaction is very important, for it orientates meta-compounds.

    1
    0
  • Homo-pyrocatechin is an isomer (CH 3: OH: OH= I: 3 : 4), found as its methyl ether (creosol) in beech-wood tar.

    1
    0
  • Atropine is optically inactive; hyoscyamine, possibly a physical isomer, which yields atropine when heated to 108.6°, is laevorotatory.

    1
    1
  • The third isomer (sarcolactic acid) is found in meat extract (J.

    1
    1
  • For an isomer, isocampholactone (the lactone of trimethyl-2.2.

    1
    1
  • van't Hoff and others have established, corresponds to the presence of one or more asymmetric atoms of carbon - that is, atoms directly united to elements or radicles all different from one another - and in every case there exists an isomer that rotates the plane of polarization to the same degree in the opposite direction.

    1
    1
  • Ladenburg (Ann., 1875, 179, p. 163) to be symmetrical trimethyl benzene; terephthalic acid, the remaining isomer, must therefore be the para-compound.

    0
    0
  • Benzoflavin, an isomer of chrysaniline,1`is also a dye-stuff, and has been prepared by K.

    0
    0
  • Jorgensen in the second dinitrotetramminecobalt chloride, [Co(NO 2) 2 (NH 3) 4 ]Cl, designated as flavo - whereas the older isomer of Gibbs was distinguished as croceo-salt.

    0
    0
  • Only the (Z) isomer was formed in analogy to the N, O ketene acetals.

    0
    0
  • dextro isomer, which is not present in Vicks, is the drug of abuse.

    0
    0
  • This is known as a racemic mixture and it is optically inactive due to one isomer canceling out the optical effect of the other.

    0
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  • isomer of each organic compound is usually present.

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  • isomer formed - it is produced too slowly.

    0
    0
  • Not only is the product a stereospecific optical isomer, the reactant is it self a stereospecific geometrical isomer!

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  • The active site of an enzyme will only be able to operate on one type of optical isomer.

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  • isomer shift should always be quoted with respect to a standard material.

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  • The geometry of the s-trans isomer also shows a significant double bond character for the N-P bond.

    0
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  • This bond distance is longer for the s-cis isomer, which also shows a shortening of the central N-N bond (Figure 1 ).

    0
    0
  • You will notice that: the trans isomer has the higher melting point; the CIS isomer has the higher boiling point.

    0
    0
  • Phenazone is an isomer of phenazine, to which it bears the same relation that phenanthrene bears to anthracene.

    0
    0
  • Ladenburg (Ann., 1875, 179, p. 163) to be symmetrical trimethyl benzene; terephthalic acid, the remaining isomer, must therefore be the para-compound.

    0
    0
  • MANDELIC ACID (Phenylglycollic Acid), C 8 H 8 O 3 or C 6 H 5 CH(OH) COOH, an isomer of the cresotinic and the oxymethylbenzoic acids.

    0
    0
  • Chavibetol, an isomer of eugenol, occurs in the ethereal oil obtained from Piper betle.

    0
    0
  • Benzoflavin, an isomer of chrysaniline,1`is also a dye-stuff, and has been prepared by K.

    0
    0
  • An isomer of cinnamic acid known as allo-cinnamic acid is also known.

    0
    0
  • By the addition of the diazonium salts to a hot concentrated solution of a caustic alkali, C. Schraube and C. Schmidt(Ber., 18 94, 2 7, p. 520)obtained an isomer of potassium benzene diazotate.

    0
    0
  • Consequently, of each pair of isomers we may establish beforehand which is the more stable; either in particular circumstances, a direct change taking place, as, for instance, with maleic acid, which when exposed to sunlight in presence of a trace of bromine, yields the isomeric fumaric acid almost at once, or, indirectly, one may conclude that the isomer which forms under greater heat-development is the more stable, at least at lower temperatures.

    0
    0
  • Jorgensen in the second dinitrotetramminecobalt chloride, [Co(NO 2) 2 (NH 3) 4 ]Cl, designated as flavo - whereas the older isomer of Gibbs was distinguished as croceo-salt.

    0
    0
  • According to the above formula the critical temperature is given by 8aA/54b, and as the critical temperature is approximately proportional to the boiling-point, both being estimated on the absolute scale of temperature, we may conclude that the larger value of b corresponds to the lower boilingpoint, and indeed the isomer corresponding to the left-hand formula boils at 74°, the other at 114°.

    0
    0
  • The remaining isomer, pivalic or trimethylacetic acid, (CH3)3C C02H, melts at 35° and boils at 163°.

    0
    0
  • Atropine is optically inactive; hyoscyamine, possibly a physical isomer, which yields atropine when heated to 108.6°, is laevorotatory.

    0
    0
  • The third isomer (sarcolactic acid) is found in meat extract (J.

    0
    0
  • The fourth isomer, formed by the action of Bacillus laevo-lacti on cane-sugar, resembles sarcolactic acid in every respect, except in its action on polarized light (see Stereoisomerism).

    0
    0
  • Metaor iso-xylene, the most important isomer, may be prepared by nucleus-synthetic reactions, or by distilling mesitylenic acid, C 6 H 3 (CH 3) 2 CO 2 H, an oxidation product of mesitylene, C 6 H 3 (CH 3) 3, which is produced on the condensation of acetone, with lime; this reaction is very important, for it orientates meta-compounds.

    0
    0
  • For an isomer, isocampholactone (the lactone of trimethyl-2.2.

    0
    0
  • van't Hoff and others have established, corresponds to the presence of one or more asymmetric atoms of carbon - that is, atoms directly united to elements or radicles all different from one another - and in every case there exists an isomer that rotates the plane of polarization to the same degree in the opposite direction.

    0
    0
  • Homo-pyrocatechin is an isomer (CH 3: OH: OH= I: 3 : 4), found as its methyl ether (creosol) in beech-wood tar.

    0
    0
  • Recent research work has been directed at the toxicity associated with the levo isomer, and how it compares with the racemic preparation.

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