In which of the following specific organic frameworks is the manifestation of Geometrical Isomerism — Isomerism and Stereochemistry Chemistry Question

💡 Solution & Explanation

Geometrical isomerism dictates that free rotation must be restricted AND that each individual atom involved in the restricted bond must bear two distinct substituents. In 2-Methyl-2-butene ($CH_3-C(CH_3)=CH-CH_3$), carbon-2 is bonded to two identical methyl groups, rendering spatial distinguishable arrangements impossible.