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NEET2003ChemistryGeneral Organic ChemistryActual

In this reaction: aligned CH ₃ CHO + HCN & CH ₃ CH ( OH ) CN H . OH & CH ₃ CH ( OH ) COOH aligned an symmetric centre is generated. The acid obtained would be:

Options

  1. AD-isomer
  2. BL-isomer
  3. C50 % D +50 % L-isomer
  4. D20 % D +80 % ~L -isomer

Correct answer

C. 50 % D +50 % L-isomer

Step-by-step solution

Lactic acid is an optically active compound due to presence of assymmetric carbon. It exist in D and L form in the ratio 1: 1 , forming a racemic mixture. Related Theory Enantiomers are stereoisomers which are non superimposable, mirror images. A mixture of equal amounts of two stereoisomers of an optically active substance is called a racemic mixture or racemate.

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