Which one of the following can exhibit cis-trans-isomerism?

Question

Which one of the following can exhibit cis-trans-isomerism? (A) CH3 - CHCI - COOH (B) H - C ≡ C - Cl (C) Cl - CH =CHCI (D) CICH2 - CH2CI

Tardigrade Admin · Accepted Answer

The main conditions for geometrical isomerism are
(i) The molecule must have a double bond and the double bond gives restricted rotation
(ii) The two atoms or groups attached to the same carbon atom must be different.
These two conditions are only obeyed by

Cl - C H = C H - Cl

, so it shows geometrical isomerism.

Q. Which one of the following can exhibit cis-trans-isomerism?

$C H_{3} - C H C I - COO H$

$H - C \equiv C - Cl$

$Cl - C H = C H C I$

$C I C H_{2} - C H_{2} C I$

Q. Which one of the following can exhibit cis-trans-isomerism?

CH3​−CHCI−COOH

H−C≡C−Cl

Cl−CH=CHCI

CICH2​−CH2​CI

$C H_{3} - C H C I - COO H$

$H - C \equiv C - Cl$

$Cl - C H = C H C I$

$C I C H_{2} - C H_{2} C I$