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| - Coordination Complexes of the Dimethylthiophosphonium Cation andLigand Exchange
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| - The quantitative exchange of a 4-(dimethylamino)pyridine ligandon the dimethylthiophosphonium cation by Me3P demonstrates thecoordinative nature of the N−P and P−P bond and diversifies afundamentally important new direction in the coordination chemistryof phosphorus as an acceptor.
- A fundamentally important new direction in the coordination chemistry of phosphorus has now been diversified with the discovery of complexes involving the thiophosphonium cation as an acceptor. The reaction of dimethylthiophosphoryl chloride with 4-(dimethylamino)pyridine (DMAP) and Me3SiOTf results in the formation of a cationic adduct representing a DMAP complex of the dimethylthiophosphonium cation. The quantitative exchange reaction of DMAP for Me3P demonstrates the coordinative nature of the N−P and P−P bonds. In the analogously attempted displacement reaction of the DMAP complex with Me2PPMe2, a redox reaction is observed rather than the formation of a diphosphine−thiophosphonium complex.
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