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exo-endo-Isomers of phosphine-substituted tricarbonyl-(η-Cyclohepta−1,3−Diene)Iron complexes)

1981; Elsevier BV; Volume: 218; Issue: 1 Linguagem: Inglês

10.1016/s0022-328x(00)80997-3

1872-8561

David A. Brown, W.K. Glass, F. M. HUSSEIN,

Chemical Synthesis and Analysis

Abstract Nucleophilic addition to the tricarbonyl(15-η-cycloheptadienylium)iron cation by phosphines forms either the 5- exo or 5- endo isomer depending on reaction conditions and solvent used; in dichloromethane, direct attack at the ring gives the 5- exo phosphine substituted product whereas in acetonitrile, a red intermediate is observed and the 5- endo isomer is formed probably via a metal-assisted pathway.