Trichalcogenophosphonic Acids RPE3H2 and their Derivatives

The coordination chemistry of the trichalcogenophosphonates is very undeveloped when compared to the analogous metal organophosphonates (RP032), which have been extensively studied owing to their potential and practical applications as ion exchangers, sorbents, sensors, proton conductors, nonlinear optical materials, photochemically active materials, catalysts and hosts for the intercalation of a broad spectrum of guests.145 

Hitherto, only two structurally characterised triselenophosphonate complexes have been published, PtSe2P(Se)PPh(dppe)153 and (c-C6H11)PSe3Li2.2tmeda,38 in which the triselenophosphonate ligand coordinates to the metal centre(s) using two (T) or three (V) selenium atoms respectively. 

Amido and Imido Derivatives of Chalcogeno-Phosphorus Acids 

The amido and imido derivates of phosphorus-chalcogen ligands have been of much interest to coordination chemists due to the fact that they possess both hard (nitrogen) as well as soft (chalcogen) donor sites and are therefore able to act as heteroleptic ligand systems.56 

4 Applications of Compounds and Complexes Containing Phosphorus-Chalcogen Bonds 

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