Syntheses and X-ray structural characterization of phosphine cobalt(II) complexes with 2-mercaptobenzothiazole
摘要:
Mononuclear cobalt(II) complexes Co(mbt-N)(2)(PBu(3)(n))(2) (1) (Hmbt = 2-mercaptobenzothiazole; PBu(3)(n) = tri-n-butyphosphine) and Co(mbt-S,N)(2)(dppe). MeCN (2) [dppe = 1,2-bis(diphenylphosphino) ethane] were synthesized and characterized by X-ray crystallography, IR and EPR spectra, cyclic voltammetric data and magnetic susceptibility measurements. The Co atom in (1) exhibits an approximate square-planar geometry with the heterocyclic N-donors from mbt bonding to the cobalt atom in a monodentate mode. Complex (2) has a distorted octahedral environment of Co with both the exocyclic-S and the hetero-N donors of mbt bound to the cobalt atom in a bidentate chelating mode. The Co atom in both complexes shows spin state of S = 3/2 with mu(eff) of 4.25 and 4.40 mu(B) for 1 and 2, respectively. (C) 1997 Elsevier Science Ltd.