Highly Reduced, Polyoxo(alkoxo)vanadium(III/IV) Clusters
作者： Ian S. Tidmarsh , Rebecca H. Laye , Paul R. Brearley , Maheswaran Shanmugam , E. Carolina Sañudo
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摘要: A family of high nuclearity oxo(alkoxo)vanadium clusters in unprecedentedly low oxidation states is reported, synthesised from simple vanadium diketonate precursors alcohols under solvothermal conditions. Crystal structures [V 18 (O) 12 (OH) 2 -(H O) 4 (EtO) 22 (O CPh) 6 (acac) ] (1), 16 Na /(EtO) (EtOH) -(HO ∝ (2), 13 15 -(EtOH)(RCO ) 3 which R=adamantyl (3) or Ph C (4), and 11 -(EtO) (EtOH)(Ph CCO )2(MeP03)] (5) are revealing these to be {V III V IV } 9 (3 4) 8 clusters, while consists isolated B bridged into polymeric chains by (Na -(OEt) fragments. Solvothermal conditions essential the formation species, level part controlled crystallisation time, with lowest mean-oxidation-state species being direct on cooling reaction solutions.
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