996-04-3

The 1H NMR spectral analysis of four 8-membered rings, 2-thioxo- (or 2-oxo) 2-R-1,3,6,2-trithiaphosphocane is reported.The stereochemistry of the 8-membered ring is discussed.The 31P NMR spectral parameters 1J(PC)> obtained on several cyclic 1,3,2-dithiaphospha compounds of variable size (5, 6, 8, 12 and 16-membered rings) are discussed as a function of the ring size and of the geometry of the molecule.

Interactions of O-(alkylchloroformoimino)trichloromethylphosphoranes with hydrogen sulfide and mercaptans are reported; interaction with 2-mercaptoethanol is discussed and activation of the chlorine at a sp2 hybridized carbon by means of the phosphorane fragment is demonstrated in the substitution reactions with S-nucleophiles; the method of P=S bond formation in chlorophosphoranes by means of the reaction with thioacetic acid is suggested; some derivatives of O-alkylchloroformooximes are described. Key words: O-(alkylchloroformoimino)trichloromethylphosphoranes; O-(alkylchloroformoimino)chloromethylthionophosphonates; O-(alkylchloroformoimino)-O-alkylmethylthionophosphonates; bis(O-methylchloroformoimino)methylphosphonate; O-chloromethylphosphonate; O-(methyl-S-acetylformoimino)chloromethylthionophosphonate.