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Kinetics and mechanism of dimerization of arylmercurials
Author(s) -
Wang Yulan
Publication year - 1993
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550250204
Subject(s) - chemistry , steric effects , kinetics , hexamethylphosphoramide , steric factor , kinetic energy , activation energy , stereochemistry , reaction mechanism , mechanism (biology) , medicinal chemistry , catalysis , organic chemistry , philosophy , epistemology , physics , quantum mechanics
Abstract The kinetics of dimerization of arylmercurials XC 6 H 4 HgCl (X H, p ‐CH 3 , m ‐CH 3 , p ‐Cl, m ‐OCH 3 , m ‐CO 2 C 2 H 5 , and o ‐OCH 3 ) in the presence of [ClRh(CO) 2 ] 2 was studied in hexamethylphosphoramide (HMPA). The experimental rate law obtained is − d [ArHgCl]/ dt = k [ArHgCl] 2 . The kinetic parameters of these reactions have been reported, and the variation, therein, has been explained on the basis of steric effect of substituents. The apparent activation energy E is linearly proportional to pre‐exponential factor lnA. A most plausible mechanism has been proposed on the basis of experimental results. © 1993 John Wiley & Sons, Inc.