Are the following pairs identical, enantiomers, diastereomers, or constitutional isomers?
(a) and
(b) and

Question

Are the following pairs identical, enantiomers, diastereomers, or constitutional isomers? (a) and (b) and

TestHub · Accepted Answer

Ans. (A) (a) Enantiomers (b) Enantiomers.

Sol. (a) Both Newman projections are butan-2-ol. The front carbon is the stereocentre; swapping OH and CH₃ on it changes its configuration (R to S, or S to R) : enantiomers.

(b) Both are 1-bromo-1-chloro-2-methylbutane. In (b) Br and Cl are interchanged on the front carbon and CH₃ and C₂H₅ on the back carbon, so both stereocentres are inverted : enantiomers.

Chemistry - STEREO ISOMERISM Question with Solution | TestHub

Options:

Doubts & Discussion