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
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Problem Details

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

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