Question

Which of the following substituents will have a greater influence on shown below? the s x- Me Me

Answer 1

Question 1

second option will be correct. It is because epoxidation normally chooses the side with less steric hindrance. So X = tertiary butyl group have highest steric hindrance in the given options. So apoxidation happens in the opposite direction of X. So given steriochemical outcome of the product is obtained more likely when X= tertiary butyl group.

Question 2

Third option will be correct. Substitution at A will give more steric hindrance for apoxidation compared to substitution at other two positions B and C. So substitution at A will result in the given product.

Question 3

When the two reagents are achiral then the product will be racemic mixture. That is 50-50 mixture of two enantiomers. That means racial mixture of stereoisomers.

Question 4

True