碳—碳键均裂反应的溶剂效应

Solvent Effect on the Homolytic Reaction of Carbon-Carbon Bond

测定了meso-2,3-二氰基-2,3-二苯基丁二酸二乙酯分别在乙苯、苯乙醚、氯苯、苯甲酸甲酯、苯甲腈及1,2-二溴乙烷中,于90,100,110,120℃的异构化动力学、平衡常数、反应速率常数和活化参数.结果表明,平衡常数对溶剂和反应温度都不敏感.

The kinetics of the thermal meso/dl ieomerization of meso-diethyl 2, 3-dicyano-2, 8-diphenylsuccinate were determined in ethylbenzene, ethylphenyl ether, chlorobcn-zene, methyl benzoate, phenyl cyanide and 1, 2-dibromoethane at 90, 100, 110 and 120癈 respectively. The equilibrium constants, rate constants and activation parameters of the thermal meso/dl isomerization was obtained. The results indicated that the equilibrium constants are not sensitive to both solvents and reaction temperature.