CH 3 -CH(Cl)-CH=CH-CH(Cl)-CH 3 A mixture of all stereoisomers possible from this structure is subjected to fractional distillation. Then how many fractions will be obtained ?

Question

TestHub · Accepted Answer

Ans. (A) 4.

Sol. 2,5-Dichlorohex-3-ene has two equivalent stereocentres and one stereogenic double bond. The stereoisomers are: (E)-(2R,4R) and (E)-(2S,4S) [enantiomeric pair], (E)-(2R,4S) [meso], (Z)-(2R,4R) and (Z)-(2S,4S) [pair], and (Z)-(2R,4S) [meso] : 6 stereoisomers. Enantiomers have identical boiling points and distil together, so the number of fractions = 4.

Chemistry - STEREO ISOMERISM Question with Solution | TestHub

Options:

Doubts & Discussion