title: Non-oxido divanadium(IV) and divanadium(V) thiolate complexes with a new type of chalcogenide bridging motif.
abstract: In our effort to study vanadium chalcogenide chemistry, we have synthesized and characterized a class of non-oxido divanadium(IV) and divanadium(V) complexes with chalcogenide and dichalcogenide as bridges. All structures consist of a similar divanadium motif, in which two metal centers are bridged by one μ-chalcogenide and one μ-η(2):η(2)-dichalcogenide, forming a V2(μ-E)(μ-η(2):η(2)-E2) (E = S or Se) core structure. These compounds are [V(IV)2(PS3)2(μ-Se2)(μ-Se)][PPh4]2 (1), [V(V)2(PS3'')2(μ-Se2)(μ-Se)] (2), [V(V)2(PS3'')2(μ-S2)(μ-S)] (3a) and [V(V)2(PS3)2(μ-S2)(μ-S)] (3b) ([PS3](3-) = P(C6H4-2-S)3 and [PS3''](3-) = P(C6H3-3-SiMe3-2-S)3). Compound 1 exhibits diamagnetic behavior, indicating strong antiferromagnetic coupling between two d(1) centers. Compounds 2 and 3a-b have the highest oxidation states for vanadium ions (+5/+5) among those reported divanadium chalcogenide clusters. The work demonstrates that high-valent divanadium chalcogenide clusters can be obtained with the activation of elemental chalcogens by low-valent vanadium ions.
authors: Department of Chemistry, National Cheng Kung University, Tainan 701, Taiwan. konopka@mail.ncku.edu.tw.
authors: Hong-Ming
authors: HM
authors: Wu
authors: Ya-Ho
authors: YH
authors: Chang
authors: Yi-Fang
authors: YF
authors: Tsai
authors: Kuei-Fang
authors: KF
authors: Hsu
authors: Gene-Hsiang
authors: GH
authors: Lee
authors: Hua-Fen
authors: HF
authors: Hsu
mesh_terms: D018011:Chalcogens / Q000737:chemistry*; D056831:Coordination Complexes / Q000737:chemistry*; D018360:Crystallography, X-Ray; D008958:Models, Molecular; D010084:Oxidation-Reduction; D013438:Sulfhydryl Compounds / Q000737:chemistry*; D014639:Vanadium / Q000737:chemistry*
chemical_list: D018011:Chalcogens; D056831:Coordination Complexes; D013438:Sulfhydryl Compounds; D014639:Vanadium