Determine the exact total number of geometrical isomers possible for the linear, unsymmetrical diene — Isomerism and Stereochemistry Chemistry Question

💡 Solution & Explanation

The molecule contains $n=2$ consecutive stereogenic double bonds capable of exhibiting restricted rotation (Geometrical Isomerism). Because the two terminal groups ($-CH_3$ and $-Cl$) are different, the molecule lacks overall symmetry. For unsymmetrical systems, the total number of isomers is exactly $2^n$. Thus, $2^2 = 4$ geometrical isomers are possible.