Synthesis and reactions of (tert-butylimido)bis(η-cyclopentadienyl)niobium cations: NMR evidence for d0 olefin cations [Nb{(η-C5H5)2}(NtBu)(η-C2H4)][B(C6F5)4] and [Nb{(η-C5H4)CMe2(η-C5H4)}(NtBu)(η-C2H3Me)][B(C6F5)4]

Martin J. Humphries; Richard E. Douthwaite; Malcolm L. H. Green

doi:10.1039/B004062M

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Synthesis and reactions of (tert-butylimido)bis(η-cyclopentadienyl)niobium cations: NMR evidence for d⁰olefincations [Nb{(η-C₅H₅)₂}(N^tBu)(η-C₂H₄)][B(C₆F₅)₄] and [Nb{(η-C₅H₄)CMe₂(η-C₅H₄)}(N^tBu)(η-C₂H₃Me)][B(C₆F₅)₄]

Martin J. Humphries,^a Richard E. Douthwaite^a and Malcolm L. H. Green*^a

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* Corresponding authors

^a Inorganic Chemistry Laboratory, South Parks Road, Oxford, UK

Abstract

The new (tert-butylimido)η-cyclopentadienylniobium compounds [Nb(η-C₅H₅)₂(N^tBu)(O₃SCF₃)] 1*, [Nb(η-C₅H₅)₂(N^tBu)(PMe₃)][O₃SCF₃] 2*, [Nb(η-C₅H₅)₂(N^tBu)][MeB(C₆F₅)₃] 3, [Nb(η-C₅H₅)₂(N^tBu)][B(C₆F₅)₄] 4, [Nb(η-C₅H₅)₂(N^tBu)(η-C₂H₄)][B(C₆F₅)₄] 5, [Nb{(η-C₅H₄)₂CMe₂}(N^tBu)(O₃SCF₃)] 6, [Nb{(η-C₅H₄)₂CMe₂}(N^tBu)][B(C₆F₅)₄] 7, [Nb{(η-C₅H₄)₂CMe₂}(N^tBu)(η-C₂H₄)][B(C₆F₅)₄] 8 and [Nb{(η-C₅H₄)₂CMe₂}(N^tBu)(η-C₃H₆)][B(C₆F₅)₄] 9 have been prepared and characterised; * indicates the crystal structure has been determined.

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Crystal structure data TXT (52K)

Article information

DOI: https://doi.org/10.1039/B004062M
Article type: Paper
Submitted: 22 May 2000
Accepted: 05 Jul 2000
First published: 09 Aug 2000

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J. Chem. Soc., Dalton Trans., 2000, 2952-2959

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Synthesis and reactions of (tert-butylimido)bis(η-cyclopentadienyl)niobium cations: NMR evidence for d⁰ olefin cations [Nb{(η-C₅H₅)₂}(N^tBu)(η-C₂H₄)][B(C₆F₅)₄] and [Nb{(η-C₅H₄)CMe₂(η-C₅H₄)}(N^tBu)(η-C₂H₃Me)][B(C₆F₅)₄]

M. J. Humphries, R. E. Douthwaite and M. L. H. Green, J. Chem. Soc., Dalton Trans., 2000, 2952 DOI: 10.1039/B004062M

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Journal of the Chemical Society, Dalton Transactions