A Kinetic Study on the Thermal Decomposition of Diethyl 2,3-Di-cyano-2,3-di(X-Substituted phenyl) Succinates in Styrene

Chem. J. Chinese Universities ›› 1994, Vol. 15 ›› Issue (2): 287.

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A Kinetic Study on the Thermal Decomposition of Diethyl 2,3-Di-cyano-2,3-di(X-Substituted phenyl) Succinates in Styrene

QI Chen-Ze, WU Jing-Jia, DUAN Da-Yong, JIA Zhi-Sheng, ZHANG Bin, YANG Di-Lun

The State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou, 730000

Received:1993-05-17 Revised:1993-09-10 Online:1994-02-24 Published:1994-02-24

Abstract

Abstract: The kinetics of thermal decomposition of diethyl 2,3-dicyano-2,3-di(X-substituted 、phenyl) succinates(X=o-OCH₃,1;p,m-di-OCH₃,2; p-OCH₃,3) in styrene at different temperatures was studied by means of dilatometry.The values of Ed for 1,2 and 3 are 134, 64.6 and 51.0 kJ/mol, respectively.The ring substituents of different position in these diesters give the following order of activity:o-OCH₃>p,m-di-OCH₃>p-OCH₃.

Key words: Diethyl 2,3-dicyano-2,3-di(X-substituted phenyl) succinate, Initiation acitivity, Electron effect, Steric effect

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QI Chen-Ze, WU Jing-Jia, DUAN Da-Yong, JIA Zhi-Sheng, ZHANG Bin, YANG Di-Lun . A Kinetic Study on the Thermal Decomposition of Diethyl 2,3-Di-cyano-2,3-di(X-Substituted phenyl) Succinates in Styrene[J]. Chem. J. Chinese Universities, 1994, 15(2): 287.

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A Kinetic Study on the Thermal Decomposition of Diethyl 2,3-Di-cyano-2,3-di(X-Substituted phenyl) Succinates in Styrene

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