Chemistry - STEREO ISOMERISM Question with Solution | TestHub

Ans. (A) (a) R (b) 2R, 3S (c) 2R, 3S.

Sol. (a) Priorities: Br $>$ CH₂CH₂Br $>$ CH₂CH₂CH₃ $>$ H. R configuration. (b) Number the chain from the CH₂Br end: C₂ (carrying Br): Br $>$ CH₂Br $>$ C₃ side $>$ H : R. C₃ (carrying OH): OH $>$ C₂ side $>$ CH₃ $>$ H : S. (c) Number from the CH₃-CHBr end: C₂: Br $>$ C₃ side $>$ CH₃ $>$ H : R. C₃: Br $>$ C₂ side $>$ CH₂CH₃ $>$ H : S.