Dithiophosphonic acid

Fewer routes are known for the preparation of dithiophosphonic acids. Nevertheless sodium dithiophosphophonates have been prepared in high yields from reaction of dithiadiphosphetane disulfides with a sodium alkoxide or aryloxide in the corresponding alcohol solution (Equation 25).40,41... 

Phosphor-1,1-dithiolates comprise ligands derived from dithiophosphoric acid 0,0-dithioesters (further called simply dithiophosphates), dithiophosphinic acids (dithiophosphinates), and the hybrid dithiophosphonic acid O-monoes-ters (dithiophosphonates) (Scheme 1). 

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,... 

Dithiophosphinic acids Dithiophosphoric acid 0,0-diesters Dithiophosphonic acid O-esters... 

Several compounds with fungicidal properties have also been found among the derivatives of phosphonic, thio- and dithiophosphonic acids. Compounds of general formula (38) have the highest activity. 

Dithiophosphonic acids and esters Dithiophosphorous acid esters Thiolthionophosphonic acid 0-diesters... 

Dithiadiphosphetans.—2,4-Disubstituted 1,3,2,4-dithiadiphosphetan 2,4-disulphides (155) are the anhydrides of dithiophosphonic acids. They have been prepared by the reaction of (156) with The di-t-butyl derivative (155 ... 

Using various classes of organic compounds containing different functional groups and substituents, the authors examined the relationship between their stmcture and the kinetic parameters of sulphur vulcanisation, the mechanism of sulphur vulcanisation of unsaturated rubbers in the presence of these organic compounds, and studied the effectiveness of binary systems of accelerators. The compounds studied were phosphorylated dithiocarbamates and dithiocarbamates, derivatives of dithiophosphoric and dithiophosphonic acids, phosphorylated thioamides and thioamides, and phosphorylated thioureas and thioureas. 50 refs. Articles from this journal can be requested for translation by subscribers to the Rapra produced International Polymer Science and Technology. 

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