Reductive Formation of a Vanadium(IV/V) Oxide Cluster Complex [V8O19(4,4'- tBubpy)3] Having a C3-Symmetric Propeller-Shaped Nonionic V8O19 Core

Yuta Inoue; Shintaro Kodama; Nobuto Taya; Hirohiko Sato; Katsuyoshi Oh-Ishi; Youichi Ishii

doi:10.1021/acs.inorgchem.8b00651

Reductive Formation of a Vanadium(IV/V) Oxide Cluster Complex [V₈O₁₉(4,4'- ^tBubpy)₃] Having a C₃-Symmetric Propeller-Shaped Nonionic V₈O₁₉ Core

Inorg Chem. 2018 Jul 2;57(13):7491-7494. doi: 10.1021/acs.inorgchem.8b00651. Epub 2018 Jun 13.

Authors

Yuta Inoue, Shintaro Kodama, Nobuto Taya, Hirohiko Sato, Katsuyoshi Oh-Ishi, Youichi Ishii

PMID: 29896962
DOI: 10.1021/acs.inorgchem.8b00651

Abstract

A novel C₃-symmetric propeller-shaped vanadium(IV/V) oxide cluster complex, [V₈O₁₉(4,4'- ^tBubpy)₃] (V₈'), has been synthesized from the reaction of the windmill-shaped vanadium(V) oxide cluster complex [V₈O₂₀(4,4'- ^tBubpy)₄] (V₈) with PPh₃ under N₂, whereas refluxing V₈ in methanol or ethanol under N₂ provides tetranuclear oxido(alkoxido)vanadium(IV/V) complexes [V₄O₆(OR)₆(4,4'- ^tBubpy)₂] [R = Me (V₄'-Me) and Et (V₄'-Et)]. The mixed-valent vanadium(IV/V) clusters V₈' and V₄' are converted back to V₈ under O₂. Interconversions of V₄' and the oxido(alkoxido)vanadium(V) complexes [V₄O₈(OMe)₄(4,4'- ^tBubpy)₂] (V₄) and [V₇O₁₇(OEt)(4,4'- ^tBubpy)₃] (V₇-Et) are also presented.