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- W2018775218 abstract "Electron-acceptor properties of bis-niobocenes (η5-C5H4Y)(H)Nb(η5 : η1-C5H3X)2Nb(H)(η5-C5H4Y) with X Y H and XY SiMe2OSiMe2have been investigated. Bis-niobocenes are shown to readily add two electrons forming stable salts of the corresponding dianions [(η5-C5H4Y)(H)Nb(η5 : η1- C5H3X)2Nb(H)(η5-C5H4Y)]2-. The surplus electrons can be removed to give quantitative regeneration of initial neutral bis-niobocenes. The crystal and molecular structure of the title compound has been determined; R 0.044, interatomic distance are Nb…Nb 3.93, NbH 1.62, average NbC(π) 2.36, NbC(σ) 2.31 Å, other distances correspond to the usually observed values. Unlike the neutral bis-niobocenes, there is no direct metalmetal bond in the dianionic structures. This conclusion is supported by electronic spectra of neutral and dianionic species." @default.
- W2018775218 created "2016-06-24" @default.
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- W2018775218 date "1980-11-01" @default.
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- W2018775218 title "Structure, spectral properties and interconversions of bis-niobocenes and their dianions. The crystal and molecular structure of [(η5-C5H4SiMe2OSiMe2-η5 : η1-C5H3)2Nb2H2] [Na(OEt2)2]2" @default.
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- W2018775218 doi "https://doi.org/10.1016/s0022-328x(00)92581-6" @default.
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