How Electrophilic are Ferrocenylmethyl Cations? Kinetics of their Reactions with π Nucleophiles and Hydride Donors
- 1 December 1994
- journal article
- research article
- Published by Wiley in European Journal of Inorganic Chemistry
- Vol. 127 (12) , 2493-2498
- https://doi.org/10.1002/cber.19941271221
Abstract
Second‐order rate constants for the reactions of the ferrocenylmethylium ions 2a—e with silyl enol ethers, allylsilanes, allylstannanes, and hydride donors have been determined photometrically and conductometrically in dichloromethane. The ferrocenylmethylium ions 2a—d (fc‐CHR+, R = H, Me, Ph, An) are slightly stronger electrophiles than the tropylium ion, and their electrophilic reactivities depend only slightly on the nature of R. The bis(ferrocenyl)methylium ion 2e is a considerably weaker electrophile, comparable to the tricarbonyl(cyclohexadienyl)iron cation.Keywords
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