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中文摘要：
采用密度泛函理论（DFF）B3LYP方法，以极化连续模型（PCM）和导体反应场模型（COSMORS）的溶剂模型为基础，结合反应动力学研究了2，2-二甲氧基丙烷（DMP）与2，2-二乙氧基丙烷（DEP）在凝聚相（溶液相）中的裂解反应．结果表明，四元环过渡态裂解反应机理是DMP与DEP裂解反应的主反应通道，溶剂效应和隧道效应对液相中的裂解反应速率有较大的影响，而且溶剂效应的影响更显著．在凝聚相反应理论研究中，溶剂效应和量子隧道效应都是不能忽略的因素．
英文摘要：
A systemic theoretical study on the decomposition of 2, 2-dimethoxypropane （DMP） and 2,2-diethoxypropane （DEP） in condensed phase has been carried out. The four-center cyclic transition state is studied using the B3LYP method in DFF, using the PCM and COSMORS models within the self-consistent reaction filed （SCRF） theory. The results indicate that the solvent effect and tunneling effect must be taken into accout in determining the rate constant of the decomposition reaction in the condensed phase.
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