Gold(I) phosphine complexes with bis(2-pyridyl)diselenoether: Synthesis and structure elucidation

Bis(2-pyridyl)diselenoether with the general formula (2-PySe)(2)(CH2) (L) reacts with Ph3PAuCl and [(dPPh)(AuCl)(2)1 dpph = 1,6-bis(diphenylphosphino)hexane to produce the respective complexes [(L)Au-2(PPh3)2](PF6)(2) (1) and [(L)(dpph)Au-2(PF6)(2)](n) (2). These complexes were isolated in crystalline form and studied using spectroscopic and X-ray diffraction techniques. The coordination of the ligand (2-PySe)(2)(CH2) (L) to the gold(I) metal centers in complexes [(L)Au-2(PPh3)(2)](PF6)(2) (1) and [(L)(dpph)Au-2(PF6)(2)](n) (2) occurs via the nitrogen atom of the pyridine ring, with no interaction with the selenium atoms of the bis(2-pyridyl)diselenoether. The gold derivative (Ph3PAuCl or [(dpph) (AuCl)(2)]) is responsible for the formation of a molecular complex (1) or a polymeric complex (2), and in both compounds the gold(I) metal atoms adopt an almost linear geometry. (C) 2017 Elsevier B.V. All rights reserved.