Syntheses and structural characterization of new trans-bis-[n-butyl-(p-methoxyphenyl) dithiophosphinato] nickel(II), the pyridine derivative thereof, and bis-{bis-[n-butyl-(p-methoxyphenyl) dithiophosphinato]cobalt(II)} complexes

Abstract

Three new metal complexes of ammonium n-butyl-(p-methoxyphenyl) dithiophosphinate (NH4L) were synthesized. NH4L was treated with NiCl2 center dot 6H(2)O and CoCl2 center dot 6H(2)O in ethanol to obtain a new trans-bis-[n-butyl-(p-methoxyphenyl) dithiophosphinato]nickel(II) and bis-{bis-[n-butyl-(p-methoxyphenyl) dithiophosphinato]cobalt(II)} complexes, ([Ni(L)(2)] and [Co-2(mu-L)(2)(L)(2)], respectively). Square-planar nickel(II) complex was furthermore reacted with excess pyridine (Py) and the octahedral {bis-pyridine-bis-[n-butyl-(p-methoxyphenyl)]}nikel(II) complex, ([Ni(L)(2)(Py)(2)]), was obtained. the structures of the complexes were analyzed by elemental analysis, H-1-, C-13-, P-31- NMR; and also by MS-, FTIR- and Raman spectroscopies. the magnetic susceptibilities of the Co(II) and the pyridine-Ni(II) complexes were measured to throw further light on the hybridization patterns. the solid-state structures of the nickel complexes were also done by X-ray crystallography. the P-S bonds in the Ni(II) complexes are essentially of the same lengths; indicating an effective electron delocalization around the central PS2 moiety. (C) 2019 Elsevier B.V. All rights reserved.