Dithiophosphonates Dithiophosphonic Acid O-monothioesters

The dithiophosphonic acid monoesters, RP(OR )(S)SH can be conveniently prepared by cleavage of dimeric, cyclic diphosphetane disulfides, [RP(S)S]2 with alcohols, silanols, or trialkylsilylalcohols180 and then can be converted into metal complexes M[SPR(OR )]2 without isolation.181 The substituted ferrocenyl anion, (N3C6H4CH20)(CpFeC5H4)PS2 has been prepared in two steps from P4Sio, ferrocene and hydroxymethylbenzotriazole (and its salt was used for the preparation of some nickel and rhodium complexes).182 Zwitter-ionic ferrocenylditiophosphonates, 

A convenient preparation of dithiophosphonato metal complexes of transition metals, M[S2PR(OR )]2 (M = Ni, Pd, Pt) uses the direct reaction of the Lawesson reagent, [4-MeOC6H4P(S)S]2, with metal salts in alcohols, without 

1-Dithiolato Ligands and Related Selenium and Tellurium Compounds 

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