96°5293°31 =2×5.04×10-30×0.993×0.683C·m =6.9×10-30C 4073 邻二甲苯:=2.303×103C·m 间二甲苯:=1.335×103C·m 对二甲苯:=0 4074 Cn 垂直 4076 E E E C E C E4072 =2O-H sin 2 9652' cos 2 9331' =2×5.04×10-30×0.993×0.683 C·m =6.9×10-30C·m 4073 邻二甲苯: =2.303×10-30C·m 间二甲苯: =1.335×10-30C·m 对二甲苯: =0 4074 Cn 垂直 4075 Cn 4076 C2,h,i; C2h; C2h E C2 1 h i E E C2 1 h i C2 1 C2 1 E i h h h i E i i h C2 1 E 4077 S 2 =i S - 1 = S 6 =C3+i S 4