期刊论文详细信息
Bulletin of the Korean chemical society | |
Kinetic and Theoretical Consideration of 3,4- and 3,5-Dimethoxybenzoyl Chlorides Solvolyses | |
Dennis N. Kevill1  Kyoung-Ho Park1  | |
关键词: Dimethoxybenzoyl chloride; Extended Grunwald-Winstein equation; Resonance effect; Kinetic solvent isotope effect; Activation parameters; | |
DOI : | |
学科分类:化学(综合) | |
来源: Korean Chemical Society | |
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【 摘 要 】
The solvolysis rate constants of 3,4- (1) and 3,5-dimethoxybenzoyl (2) chlorides were measured in various pure and binary solvents at 25.0 oC, and studied by application of the extended Grunwald-Winstein (G-W) equation, kinetic solvent isotope effect in methanolysis and activation parameters. The solvolysis of 1 was interpreted as the unimolecular pathway due to a predominant resonance effect from para-methoxy substituent like 4- methoxybenzoyl chloride (3), while that of 2 was evaluated as the dual mechanism, with unimolecular or bimolecular reaction pathway according to the character of solvent systems (high electrophilic/nucleophilic) chosen, caused by the inductive effect by two meta-methoxy substituents, no resonance one. In the solvolyses of 1 and 2 with two –OCH3 groups, the resonance effect of para-methoxy substituent is more important to decide the mechanism than the inductive effect with other corresponding evidences.【 授权许可】
Unknown
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RO201912010244169ZK.pdf | 725KB | ![]() |