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Organic Chemistry

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13 Mar 2010 11:45:52 IST

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what is mean different in disteriomer and enantiomer

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what is mean different in disteriomer and enantiomer

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Deepak Aggarwal

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13 Mar 2010 12:36:55 IST

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Enantiomers are stereoisomers that are mirror images of each other that are "non-superposable" (not identical), much as one's left and right hands are "the same" but opposite.

Diastereomers are stereoisomers that are not enantiomers. Diastereomerism occurs when two or more stereoisomers of a compound have different configurations at one or more (but not all) of the equivalent (related) stereocenters and are not mirror images of each other.

Diastereomers differ from enantiomers in that the latter are pairs of stereoisomers which differ in all stereocenters and are mirror images of each other. Enantiomers of a compound with more than one stereocenter are also diastereomers of the other stereoisomers of that compound that are not their mirror image. Diastereomers have different physical properties and different reactivity, unlike enantiomers.

Diastereomers

D-Threose D-Erythrose

Enantiomers

(S)-(+)-lactic acid (left) and (R)-(–)-lactic acid (right) are nonsuperposable mirror images of each other

Madhusudan Chavan

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14 Mar 2010 11:43:17 IST

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Enantiomerrs are optical isomers which share the relationship of object and mirror image. for example, d and l tartaric acid.

Diastereoisomers are optical isomers which do not share the object-mirror image relationship, for example, d or l tartaric acid and meso tartaric acid.

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