In which of the following compounds is geometrical isomerism possible ?
(1) 3,4-Dimethylhex-3-ene (2) 2-Methylpent-2-ene (3) 1,6-Dichlorohex-3-ene

Question

In which of the following compounds is geometrical isomerism possible ? (1) 3,4-Dimethylhex-3-ene (2) 2-Methylpent-2-ene (3) 1,6-Dichlorohex-3-ene

TestHub · Accepted Answer

(1) C₂H₅-C(CH₃)=C(CH₃)-C₂H₅ : each double-bond carbon carries two different groups (CH₃ and C₂H₅), so GI is possible. (2) (CH₃)₂C=CH-C₂H₅ : C-2 carries two identical CH₃ groups, so no GI. (3) ClCH₂CH₂-CH=CH-CH₂CH₂Cl : each double-bond carbon carries H and a different group, so GI is possible.

Ans. (1) and (3) only

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