浅谈环张力对C＝C及C＝O双键红外吸收频率的影响

郭艳春, 王慧婷, 魏东辉, 陈晓岚, 曹书霞

Brief Discussion of the Influence of Ring Strain on Infrared Absorption Frequencies of C＝C and C＝O Double Bonds

Yanchun Guo, Huiting Wang, Donghui Wei, Xiaolan Chen, Shuxia Cao

表2 环外C＝O键的振动频率、键长、C＝O键和C―C键的夹角(θ)计算结果

化合物类型 νC＝O/cm−1 (Calc.) 1749.83 1776.92 1820.41 1882.48 νC＝O/cm−1 (Obs.) 1715 1745 1780 1815 Bond angle (θ)/(°) 122.40 125.82 133.78 147.75 C＝O Bond length/Å 1.216 1.211 1.203 1.203