Question

Name the alkene(s) with the molecular formula C6H12 that have a single methyl branch and that show E/Z isomerism. Use E/Z to describe stereochemistry around the double bond as appropriate. Do not use cis/trans. If there are fewer than 4 possible isomers, leave the appropriate number of spaces blank.

Answer 1

Isomer: The structures which have same molecular formula but different in their arrangement of atoms, and chemical properties; are called as isomers Stereoisomers: The compound having cis and trans geometry are geometrical isomers Chan-Ingold Prelog rule for determining configuration of an alkene: Priorities of atoms and groups decided by their atomic mass. If the higher priority groups are in same side, then alkene is Z alkene, and if higher priorities groups are in different side then alkene is E. The possible stereoisomers for C6H12 are as follows: 2 CH3 Н.С CH2 Z E 2 н Not possible CH3 CH3 1сн, 2H НаС- Н с- Z E н н 2 CH3 н Only three isomers possible