Assign the absolute configuration of the following molecules Which of the follow

Question

Assign the absolute configuration of the following molecules Which of the following acids can potentially be used for optical resolution of alpha-methylbenzylamine? Eight grams of racemic alpha-methylbenzylamine was resolved into enantiomers by crystallization of its diastereomeric salts of L-(+)-tartaric acid, followed by neutralization. The isolated (S)-(-)-enantiomer was distilled in vacuum to give 1. 5 g of pure amine. Calculate the yield of (S)-(-)-alpha-methylbenzylamine. Given that (R)-alpha-methylbenzylamine has a specific rotation of +30. 5degree and (S)-alpha-methylbenzylamine has a specific rotation of -30. 5degree, what is the optical purity of a mixture whose specific rotation was found to be +20. 1degree?

Explanation / Answer

1) S,S,R,S

2) A and B

3) 38% ( since, in 8 g of racemic mix 4 g of S-isomer would be present. 1.5/4 * 100 = 38%)

4) 66%

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