作者:V. D. Kiselev、E. A. Kashaeva、M. S. Shihab、L. N. Potapova、G. G. Iskhakova
DOI:10.1023/b:rucb.0000024827.64458.0f
日期:2004.1
and external pressure on the rate of the Diels—Alder reaction between 9,10-dimethylanthracene and maleic anhydride was studied in the series of solvents with wide intervals of viscosity (0.3—43.2 mPa s), dielectric constant (2—38), and internal pressure (3—8.8 kbar). At a standard pressure these properties of the solvent exert a weak and irregular effect on the reaction rate constant and activation enthalpy
研究了温度和外压对9,10-二甲基蒽与顺丁烯二酸酐的Diels-Alder反应速率的影响,在宽粘度区间(0.3—43.2 mPa s)、介电常数(2 —38) 和内部压力 (3—8.8 kbar)。在标准压力下,溶剂的这些特性对反应速率常数和活化焓和熵产生微弱且不规则的影响。在乙腈和硅油中的高压(高达 1 kbar)光学池和恒压池(高达 6 kbar、甲苯、硅油)中研究了外部压力对速率常数的影响。在所有溶剂中都获得了接近的活化体积值。在甲苯中,反应速率在整个压力区间内平稳增加。