Problem: Upon hydrogenation, which of the following alkenes releases the least heat per mole?A) 3, 4-dimethyl-1-hexene B) (Z)-3, 4-dimethyl-2-hexene C) (E)-3, 4-dimethyl-2-hexene D) (Z)-3, 4-dimethyl-3-hexene E) (E) -3, 4-dimethyl-3-hexene
FREE Expert Solution
↓ heat produced ↑ stability
Ranking for alkene stability will appear as:
E isomer → bigger groups are on the opposite side → more stable
Since all are hexenes, the E isomer of hexene is the most stable/less heat will be produced
Upon hydrogenation, which of the following alkenes releases the least heat per mole?