Synthesis and Spectroscopic Characterization of Lead(II)bis{O,O'-ditolyldithiophosphates} and their Adducts with 2,2'-Bipyridyl and 1,10-Phenanthroline

The reaction of lead(II) dichloride with ammonium salts ofO,O'-ditolyldithiophosphoric acid have been carried out in 1:2 molar ratio by refluxing in benzene. These compounds have been further used to synthesize the adduct of the type lead(II)bis{O,O'-ditolyldithiophosphates}.2,2'-bipyridyl and lead(II)bis {O,O'-ditolyldithiophosphates}.1,10-phenanthroline by the reaction of lead(II)bis{O,O'-ditolyldithiophosphates} and 2,2'-bipyridyl and 1,10-phenanthro-line in the presence of unimolar dichloromethane and ethanol. All these complexes have been characterized by spectroscopic techniques such as IR,1H NMR and31P NMR. On the basis of spectroscopic studies tetracoordinated nature of lead atom in ditolyldithiophosphates complexes and hexacoordinated nature in their adducts have been established.