Which of the following compounds is the most stable?
A) (E)-2-methyl-1,3-pentadiene
B) 2-methyl-1,2-pentadiene
C) (Z)-2-methyl-1,3-pentadiene
D) 2-methyl-2,3-pentadiene
E) 2-methyl-1,4-pentadiene

Question

Quizplus · Accepted Answer

(E)-2-methyl-1,3-pentadiene is the most stable due to the extended conjugation of the double bonds and the more stable trans (E) configuration, which reduces steric hindrance between substituents.

Which of the Following Compounds Is the Most Stable