HH重叠4KJ/mo CH2CH3重叠146 KJ/mol ●CH3H重叠53 KJ/mol ●CH2CH23邻位交叉38KJ/molH-H 重叠 4 KJ/mol CH3 -CH3 重叠 14.6 KJ/mol CH3 -H 重叠 5.3 KJ/mol CH3 -CH3 邻位交叉 3.8 KJ/mol