Abstract

Lead (II) derivatives of disubstituted diphenyldithiophosphates have been synthesized by reaction between lead
dichloride and the sodium salt of disubstituted diphenyldithiophosphates in 1:2 molar ratio in chloroform. Adducts
with unidentate and bidentate phosphorus and nitrogen-donor molecules, corresponding to the general formula
[{(ArO)2PS2}2Pb] and [{(ArO)2PS2}2Pb.nL] (Ar = 4-Cl-3-CH3C6H3, (3,5-CH3)2C6H3); n=2 for P(C6H5)3, NC5H5,
n=1 for N2C10H8, N2C12H8), have been prepared by the straightforward reaction of these complexes with donor ligands.
These complexes have been characterized using various physicochemical techniques such as elemental analysis, IR,
heteronuclear nuclear magnetic resonance (1H, 13C, and 31P), and mass spectroscopic studies. Coordination numbers
of four and six are suggested around the lead atom in these complexes, leading to distorted tetrahedral and octahedral
geometries. The antimicrobial activity depicts that these compounds are active against bacteria Gram-positive:
Enterococcus faecalis and Bacillus cereus and Gram-negative: Escherichia coli and Klebsiella pneumoniae.