Phosphine-participated formation and crystal structures of nickel complexes with 2-sulfanylphenol and phosphine ligands

Abstract

Neutral tri- and mono-nuclear complexes [Ni₃(OC₆H₄S)₂(HOC₆H₄S)₂(PBu₃ⁿ)₂]·2EtOH 1 and [Ni(OC₆H₄S)-(PMe₂Ph)₂]2 of 2-sulfanylphenol were obtained in the presence of a phosphine in EtOH solutions, and their crystal structures determined. Complex 1 is made up of three nickel ions chelated and bridged by two OC₆H₄S^2– dianions in O_bS_t fashion and two HOC₆H₄S^– monoanions in HO_tS_b fashion, where the central nickel(II) atom has an elongated octahedral geometry whereas the two at the sides have square-planar surroundings. In 2 the nickel(II) atom is located in a square-planar environment, chelated by a OC₆H₄S^2– dianion in O_tS_t mode. Complex 1 is paramagnetic and its magnetic behaviour is explained by single-ion anisotropy.