Chemistry - STEREO ISOMERISM Question with Solution | TestHub

(A) cis-1,2-Dimethylcyclopropane: two stereocentres with an internal plane of symmetry - meso. (B) trans-1,3-Dimethylcyclobutane: C₁ and C₃ are not stereocentres (the two ring paths at each are identical), so the molecule is achiral but it is NOT a meso compound. (C) cis-1,2-Dichlorocyclohexane: two stereocentres with an internal plane - meso. (D) meso-2,3-Diphenylbutane, (2R,3S): internal plane of symmetry - meso.

Ans. (D) - compounds (A), (C) and (D) are meso.