Kinetics of nucleophilic attack on coordinated organic moieties : XII. Addition of triphenylphosphine to [(C8H11)Co(C5H5)]BF4 |
| |
| Authors: | Leon AP Kane-Maguire Paul D Mouncher Albrecht Salzer |
| |
| Institution: | Chemistry Department, University College Cardiff, P.O. Box 78, Cardiff CF1 1XL, Wales Great Britain;Anorganische-Chemisches Institut der Universität Zürich, Zürich Switzerland |
| |
| Abstract: | A stopped-flow investigation of the reversible addition of Ph3P to (C8H11)Co(C5H5)]+ indicates the rate law, kobs = k1Ph3P] + k?1. The low Δ2 of 21.0 ± 1.2 kJ mol?1 and the negative ΔS2 of ?114 ± 5 J K?1 mol?1 are consistent with rapid addition to the enyl ligand. The higher Δ2 of 86.2 ± 5.1 kJ mol?1 and the positive ΔS2 of +60 ± 17 J K?1 mol?1are as expected for the reverse dissociation. Preliminary studies show that the related complex (C7H9)Co(C5H5)]+ is at least 65 times more electrophilic towards Ph3P. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
