A non-oxo methanolate-bridged divanadium(IV) complex with tris(2-sulfanidylphenyl)phosphane ligands: synthesis, structural characterization and magnetic investigation

作者：Wu Hong Ming; Chang Ya Ho; Su Chia Lin; Lee Gene Hsiang; Hsu Hua Fen^*

来源：Acta Crystallographica Section C-Structural Chemistry, 2016, 72(5): 416-+.

DOI：10.1107/S2053229616005222

• methanolate-bridged divanadium(IV) complex
• tris(2-sulfanidylphenyl)phosphane
• triplet state
• paramagnetism
• crystal structure
• dinuclear complex
• vanadium-sulfur chemistry

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-mu-methanolato-kappa O-6:O-bis({tris[2-sulfanidyl-3-(trimethylsilyl)phenyl]phosphane-kappa P-4,S,S',S ''}vanadium(IV)) methanol disolvate, (C24H20P)[V-2(IV)(mu-OCH3)(3)(C27H36PS3)(2)]center dot 2CH(3)OH. Two V-IV metal centres are bridged by three methanolate ligands, giving a C2-symmetric V-2(mu-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.

• 出版日期2016-5