JEE Main 2022 · 29 Jul · Shift 2 · Chemistry Q89

ChemistryInteger+4 / -1Question 89 of 90

The number of stereoisomers formed in a reaction of (±)Ph(C=O)C(OH)(CN)Ph with HCN is _______.

[where Ph is −C $_6$ H $_5$ ]

Your answer

Answer and worked solution

Official answer: 3

Product $\mathrm{Ph{-}C(OH)(CN){-}C(OH)(CN){-}Ph}$ has two identical stereocentres: (R,R), (S,S) and meso. Three stereoisomers.

Answer: 3

JEE Main 2022 · 29 Jul · Shift 2, Chemistry question 89