O,O'-Dialkyldithiophosphato and O-alkyldithiophosphato nickel(II) complexes with bidentate P-donor ligands

Szüčová, Lucie; Trávníček, Zdeněk; Marek, J.
POLYHEDRON 22 [10]: 1341-1348, 2003

Keywords: Nickel(II); Dithiophosphates; X-ray structures
Abstract: The following complexes, having the general formula [Ni(S2P{O}OR)(P---P)] {R=Et (1), i-Pr (2), P---P=dppe; R=Et (3), P---P=1,4-bis(diphenylphosphino)butane (dppb)}, [Ni(S2P{OR}2)(P---P)]X {R=i-Pr (4), Et (5), P---P=1,2-bis(diphenylphosphino)ethane (dppe); R=Et, P---P=1,1-bis(diphenylphosphino)methane (dppm) (6); X=ClO4 -} and [Ni(S2P{OR}2)(dppe)X] {R=i-Pr, X=NCS- (7); R=Et, X=Br- (8)}, have been synthesized. All the compounds have been characterized by elemental analyses, IR, UV Vis, and 31P{1H} NMR spectral studies, magnetic and conductivity measurements. Single crystal X-ray analysis revealed the molecular structures of [Ni(S2P{O}OEt)(dppe)] (1), [Ni(S2P{O}OEt)(dppb)] EtOH (3) and [Ni(S2P{OEt}2)(dppe)]ClO4 (5), and confirmed a square-planar geometry around the nickel atoms. We have reason to believe that the coordination geometry in [Ni(S2P{OEt}2)(dppe)Br] H2O (8) is probably tetrahedral with monodentate coordinated (S2P{OEt}2) monoanion.
IEB authors: bývalý zaměstnanec