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Substituent effects in 1,4-disubstituted benzene and cyclohexadiene: Olefinic vs aromatic electron shift pathway of the substituent effect

✍ Scribed by Tadeusz M. Krygowski; Michał A. Dobrowolski; Michał K. Cyrański; Wojciech P. Oziminski; Patrick Bultinck


Book ID
116380088
Publisher
Elsevier
Year
2012
Tongue
English
Weight
526 KB
Volume
984
Category
Article
ISSN
2210-271X

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## Abstract A regular relationship was noted between the influence of substituents on the chemical shifts of the __ortho__ protons in mono‐substituted benzenes and the influence of the same substituents on the protons in the __cis__ relationship in monosubstituted ethylenes.

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## Abstract In __para__‐disubstituted benzenes, the effect of one substituent is transferred to the other composite substituent group and its decreased influence on the __ortho__ and __meta__ protons is reflected in their chemical shifts. A graphical presentation of this linear non‐additive depende