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Transition metal dithiophosphate complexes are coordination compounds containing dithiophosphate ligands, i.e. ligands of the formula (RO)2PS−
2. The homoleptic complexes have formulas M[S2P(OR)2]2 and M[S2P(OR)2]3. These neutral complexes tend to be soluble in organic solvents, especially when R is branched.
Perhaps the most important members are zinc dialkyldithiophosphates, which are oil additives. Such compounds are prepared by the reaction of dialkoxydithiophoric acid with metal oxides, chlorides, and acetates.
References
Transition metal dithiophosphate complex Wikipedia(Text) CC BY-SA