Chemistry - STEREO ISOMERISM Question with Solution | TestHub

The compounds that show geometrical isomerism (GI) are (ii), (iii), (iv), (vi), (vii), (viii), and (ix), giving a total count of 7.

(ii) Cycloalkenes with 8 or more ring members can exist in stable cis and trans forms.

(iii), (vii) Alkenes ($>C=C<$) and diazenes ($-N=N-$) with different groups on each atom show cis/trans or syn/anti isomerism.

(iv), (vi), (viii), (ix) Cyclic and polycyclic systems with restricted rotation around the ring framework exhibit cis/trans geometric forms.

(i), (v) Do not show GI because one alkene carbon has identical groups (i), or it is an allene with an even number of cumulative double bonds (v).