Which of the following specific structural realities dictates that a terminal alkene (like 1-butene) — Isomerism and Stereochemistry Chemistry Question

💡 Solution & Explanation

For GI to exist, each carbon of the double bond must have two different groups attached. In 1-butene ($CH_2=CH-CH_2-CH_3$), the C1 carbon is bonded to two identical hydrogen atoms. Because $H = H$, the geometric permutation fails to create a new spatial isomer.