title: A non-oxo methanolate-bridged divanadium(IV) complex with tris(2-sulfanidylphenyl)phosphane ligands: synthesis, structural characterization and magnetic investigation.
abstract: Vanadium chemistry is of interest due its biological relevance and medical applications. In particular, the interactions of high-valent vanadium ions with sulfur-containing biologically important molecules, such as cysteine and glutathione, might be related to the redox conversion of vanadium in ascidians, the function of amavadin (a vanadium-containing anion) and the antidiabetic behaviour of vanadium compounds. A mechanistic understanding of these aspects is important. In an effort to investigate high-valent vanadium-sulfur chemistry, we have synthesized and characterized the non-oxo divanadium(IV) complex salt tetraphenylphosphonium tri-μ-<!?tlsb=-0.11pt>methanolato-κ(6)O:O-bis({tris[2-sulfanidyl-3-(trimethylsilyl)phenyl]phosphane-κ(4)P,S,S',S''}vanadium(IV)) methanol disolvate, (C24H20P)[V(IV)2(μ-OCH3)3(C27H36PS3)2]·2CH3OH. Two V(IV) metal centres are bridged by three methanolate ligands, giving a C2-symmetric V2(μ-OMe)3 core structure. Each V(IV) centre adopts a monocapped trigonal antiprismatic geometry, with the P atom situated in the capping position and the three S atoms and three O atoms forming two triangular faces of the trigonal antiprism. The magnetic data indicate a paramagnetic nature of the salt, with an S = 1 spin state.
authors.affiliation: Department of Chemistry, National Cheng Kung University, No. 1 University Road, Tainan City 70101, Taiwan.
authors.forename: Hong Ming
authors.initials: HM
authors.lastname: Wu
authors.affiliation: Department of Chemistry, National Cheng Kung University, No. 1 University Road, Tainan City 70101, Taiwan.
authors.forename: Ya Ho
authors.initials: YH
authors.lastname: Chang
authors.affiliation: Department of Chemistry, National Cheng Kung University, No. 1 University Road, Tainan City 70101, Taiwan.
authors.forename: Chia Lin
authors.initials: CL
authors.lastname: Su
authors.affiliation: Department of Chemistry, National Taiwan University, Taipei City 116, Taiwan.
authors.forename: Gene Hsiang
authors.initials: GH
authors.lastname: Lee
authors.affiliation: Department of Chemistry, National Cheng Kung University, No. 1 University Road, Tainan City 70101, Taiwan.
authors.forename: Hua Fen
authors.initials: HF
authors.lastname: Hsu
mesh_terms: D056831:Coordination Complexes / Q000737:chemistry*; D018360:Crystallography, X-Ray; D008024:Ligands; D059346:Magnets / Q000737:chemistry; D008958:Models, Molecular; D010720:Phosphines / Q000737:chemistry*; D013455:Sulfur / Q000737:chemistry; D014639:Vanadium / Q000737:chemistry*
chemical_list: D056831:Coordination Complexes; D008024:Ligands; D010720:Phosphines; D014639:Vanadium; D013455:Sulfur; C044646:phosphine
keywords: crystal structure; dinuclear complex; methanolate-bridged divanadium(IV) complex; paramagnetism; triplet state; tris(2-sulfanidylphenyl)phosphane; vanadium–sulfur chemistry