Chemistry - STEREO ISOMERISM Question with Solution | TestHub

Apply CIP priorities at each double bond.

(A) Left carbon : CH₂OH $>$ n-propyl (O $>$ C); right carbon : CH(Cl)CH₃ $>$ CH₂NH₂ (Cl $>$ N at the first point of difference). The higher groups are on the same side, so the configuration is Z.

(B) Higher groups are Cl and F; they lie on opposite sides, so the configuration is E.

(C) Left carbon : CH₂OH $>$ C≡CH (O $>$ C); right carbon : F $>$ CH₂OH. The higher groups are on the same side, so the configuration is Z.

(D) One alkene carbon is part of the cyclohexane ring whose two ring paths are identical, so the double bond cannot show geometrical isomerism.

Ans. (A, C)