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Methyl substituent effects on the 13C chemical shifts at the carbenium center of 2-aryl-2-propyl cations

✍ Scribed by David A. Forsyth; Robert M. Burk; Henry D. Babenco

Publisher: Elsevier Science
Year: 1982
Tongue: French
Weight: 234 KB
Volume: 23
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)86934-8

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✦ Synopsis

Methyl substituent effects on 13 c NM!? shifts of arylcarbenzwn zom are exannned as a probe of charge dzstnbution and are compared to methy effects on the solvoZyszs rates of I-a.ryZethyI derivatives. We have measured the effect of methyl substitution in the aromatic ring of 2-aryl-2-propyl cations, ArC(CH3j2+. on the 13 C NMR chemical shift of the carbenium center, C+. These data were obtained with the expectation that

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