Chemistry - STEREO ISOMERISM Question with Solution | TestHub

All four are 2,3-dibromopentanal (two different stereocentres, 2² = 4 stereoisomers). (A) = (2R,3R) and (B) = (2S,3S) are mirror images: enantiomers. (C) = (2R,3S) and (D) = (2S,3R) are likewise enantiomers. Every cross pair differs at exactly one centre: diastereomers.

Ans. (A, B) enantiomers; (C, D) enantiomers; (A, C), (A, D), (B, C) and (B, D) diastereomers.