Octahedral nickel(II) hexamethyleneimine-dithiocarbamato complexes involving bidentate N,N-donor ligands

Abstract The nickel(II) complexes of the compositions [Ni(hmidtc)(bpy) 2 ]ClO 4 ( I ), [Ni(hmidtc)(phen) 2 ]ClO 4 ( II ), [Ni(hmidtc)(phen) 2 ]SCN ( III ), [Ni(hmidtc)(phen) 2 ]PF 6 ( IV ), [Ni(hmidtc)(phen) 2 ]BPh 4 ( V ), [Ni(hmidtc)(phen) 2 ]AcO·2H 2 O ( VI ) and [Ni(hmidtc)(phen) 2 ]Br·H 2 O ( VII ), involving a combination of one hexamethyleneimine-dithiocarbamate anion (hmidtc) and two bidentate N,N-donor ligands (2,2′-bipyridine (bpy) for I or 1,10-phenanthroline (phen) for II – VII ), have been prepared. The compounds were characterized by elemental analysis, molar conductivity measurements, UV–Vis and IR spectroscopy, magnetochemical measurements and thermal analysis. A single-crystal X-ray analysis of the complex I revealed a distorted octahedral geometry with the nickel(II) ion coordinated by four nitrogen atoms (from two bidentate-coordinated bpy molecules) and two sulfur atoms (from one bidentate-coordinated hmidtc anion), together giving an NiN 4 S 2 donor set.