Substituent effects on the stretching vibration of C=C bridge bond in diphenylpropylenes
作者单位：School of Materials Science and Engineering Hunan University of Science and Technology School of Chemistry and Chemical Engineering Hunan University of Science and Technology
会议名称：《中国化学会·第十三届全国物理有机化学学术会议》
会议日期：2019年
学科分类：07[理学] 070303[理学-有机化学] 0703[理学-化学]
关 键 词：Diphenylpropylenes Substituent effects Stretching vibration frequencies Substituent cross-interaction effect
摘 要：The 38 samples of 1,2’-diphenylpropylenes XArC(Me)=CHArY(XSMBY) were synthesized,and their infrared absorption spectra were recorded.Based on the stretching vibration frequencies v of C=C bridge bond of XSMBYs,an optimality equation quantifying the v values of XSMBYs was obtained(shown as Eq.1).Eq.1 indicates that the Hammett polar constants of X and Y,the excited-state substituent constants of X and Y,and the substituent cross-interaction effect between side-group Me and X are important for the quantitative regression analysis of the vvalues of XSMBYs.The substituent cross-interaction effect between side-group Me and X was expressed by ω,andω=[σ(Me)-σ(X)]=[-0.17-σ(X)].The plot of the v values calculated by Eq.1 versus the experimental ones for XSMBYs was made,as shown in Fig.1.