Chemistry - STEREO ISOMERISM Question with Solution | TestHub

Question Explanation: Assigning E/Z and Z/E notations based on priority rules.

Concept: Cahn-Ingold-Prelog (CIP) priority rules.

Solution: High-priority groups on the same side of the double bond are denoted as Z (Zusammen), and on opposite sides as E (Entgegen).

So, priority is $\mathrm{I}>\mathrm{Br}$ and $\mathrm{Cl}>\mathrm{F}$.

In (1), Both I and Cl are on the same side (Z).

In (3), both ${\mathrm{CH}}_3$ are on the same side (Z). Both are correct.

Final Answer: (A) and (C)