、偶极矩 N H 1.73D 190D 1.58D N 70D 0.51D Ⅰ+C Ⅰ>+C 1.81DN H O S N H O S 0.70D -I>+C 1.73D -I 1.90D -I 0.51D -I>+C 1.81D +C>-I 1.58D -I 三、偶极矩