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Extra polar interactions in the transition states of the cross cycloadditions of differently substituted trifluorostyrenes: 1. Kinetics of the cycloaddition of p ‐trifluoromethyltrifluorostyrene and p ‐methoxytrifluorostyrene
Author(s) -
GuoZhen Ji,
YiQun Shi,
XiKui Jiang
Publication year - 1988
Publication title -
acta chimica sinica english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 0256-7660
DOI - 10.1002/cjoc.19880060413
Subject(s) - cycloaddition , chemistry , kinetics , polar , reaction rate constant , transition state , computational chemistry , photochemistry , stereochemistry , organic chemistry , catalysis , physics , quantum mechanics , astronomy
The rate constants for cross‐cycloaddition and homo‐cycloaddition reactions of p ‐methoxytrifluorostyrene and p ‐trifluoromethyltrifluorostyrene have been measured at 110–160°C with the help of the “KINETICS‐I” computer programm. Our data, particularly the π function values (1.4–1.9) which are defined by eq 10 and related to the tendency of cross‐cycloaddition, reveal that very likly there is an extra polar interaction in the transition state of the cross‐cycloaddition reaction between donor‐ and acceptor‐substituted trifluorostyrenes.