1. Quantum chemical and topological study on the insertion reaction of dichlorcarbene with acetaldehyde.
- Author
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Li ZhiFeng, Zhu YuanCheng, Yang Sheng, and Lu XiaoQuan
- Subjects
QUANTUM chemistry ,REACTION mechanisms (Chemistry) ,ACETALDEHYDE ,POTENTIAL energy surfaces ,GEOMETRY - Abstract
The insertion reaction mechanisms of siglet and striglet CCl
2 with CH3 CHO have been studied by using the OFT, NBO, CCSD(T) and AIM method. The geometries of reactions, transition state and products were completely optimized by B3LYP/6-31G(d). All the energy of the species was obtained at the CCSD(T)/6-31G(d,p) level. The calculated results indicated that all the major pathways of the reaction were obtained on the singlet potential energy surface. The singlet Cd2 can not only insert the Cα H (reaction I) but also can react with Cβ H (reaction II). There are three main existing pathways and the products are P1 (CH3 COHCCl2 ), P2 (CH2 COHCHCl2 ) and P4[CHCl2 CHCHOH] respectively. Reaction II happens more easily according to the energy changes and the barrier in rate-controlling step. In addition, the important geometries in domain pathways have been studied by AIM theory. And also, the energy changes of H in the inserted CH bond have been investigated. [ABSTRACT FROM AUTHOR]- Published
- 2008
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