Determination of the Nucleophilicity of Tricarbonyliron Coordinated Cyclohepta-1,3,5-triene
- 1 January 1999
- journal article
- Published by Institute of Organic Chemistry & Biochemistry in Collection of Czechoslovak Chemical Communications
- Vol. 64 (11) , 1770-1779
- https://doi.org/10.1135/cccc19991770
Abstract
The kinetics of the electrophilic additions of four diarylcarbenium ions (4a-4d) to tricarbonyl(η4-cyclohepta-1,3,5-triene)iron (1) have been studied photometrically. The second-order rate constants match the linear Gibbs energy relationship log k20 °C = s(E + N) and yield the nucleophilicity parameter N(1) = 3.69. It is concluded that electrophiles with E ≥ -9 will react with complex 1 at ambient temperature.Keywords
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