Syntheses and Spectroscopic Characterization on New [O–3-phenyl-1-propyl-(4-methoxyphenyl)dithiophosphonato] Ni(II), Cd(II) and Hg(II) Complexes

In this study, four new dithiophosphonic acid complexes, namely, trans-bis-[O–3-phenyl-1-propyl-(4-methoxyphenyl) dithiophosphonato] nickel (II), {Bis-pyridine-bis-(O–3–phenylpropyl (4-methoxyphenyl) dithiophosphonato]} nickel (II), bis-{bis-( O–3-phenyl-1-propyl- (4-methoxyphenyl) dithiophosphonato] cadmium (II)} and bis - { bis - ( O–3 - phenyl – 1 - propyl- ( 4-methoxyphenyl ) dithiophosphonato] mercury (II)} were syntheszed. The complexes were of the general structure [Ni(L)2] and [M(µ-L)2(L)2], M= Cd2+ and Hg2+. The nickel(II) complex was capable of coordinating two moles of pyridine per mole as many four-coordinated nickel(II) complex do leading to the six-coordinated complex, [Ni(L)2(Py)2]. All the compounds were characterized by elemental analysis; MS; FTIR and Raman spectroscopies. The [Ni(L)2], [Cd(µ-L)2(L)2] and [Hg(µ-L)2(L)2] were also investigated by 1H-, 13C- and 31P-NMR. The magnetic susceptibility of the pyridine nickel complex was measured to confirm the hybridization patterns and the geometry