N-methyl-P,P-diphenyl-N-(2-pyridinyl)phosphinothioic amide chelating ligand: Synthesis, characterization, and X-ray structures of novel Hg(II) metal complexes

N-methyl-P,P-diphenyl-N-(2-pyridinyl)phosphinous amide was oxidized with elemental sulfur in refluxing toluene to produce the corresponding sulfide C6H3N-2-N(CH3)(P(S)Ph2) (1) ligand. The reaction of 1 with an equimolar quantity of HgX2 (X = Cl, I) produced cis-[HgX2{1-?2S,Npy }] (X = Cl(2), I(3)) complexes. In addition, the side product Ph2P(S2).C6H4N(CH3)(H) (4) was identified while ligand 1 was being prepared. 1?4 were characterized using multinuclear NMR (1H, 13C, and 31P) and IR spectroscopy. The molecular structures of 1?4 were determined using a single X-ray crystallography. 2 and 3 are structurally characterized novel ?2S,Npy-bidentate ligands with Hg(II) metal complexes