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[{Cp2(tBuSe)Nb}2E] (E= O and Se) with bridging oxide or selenide ligands

[{Cp2(tBuSe)Nb}2E] (E= O and Se) with bridging oxide or selenide ligands
[{Cp2(tBuSe)Nb}2E] (E= O and Se) with bridging oxide or selenide ligands
The title compounds, -oxido-bis[(tert-butylselenolato)bis(5-cyclopentadienyl)niobium(IV)] toluene solvate, [Nb2(C5H5)4(C4H9Se)2O]·C7H8, and -selenido-bis[(tert-butylselenolato)bis(5-cyclopentadienyl)niobium(IV)], [Nb2(C5H5)4(C4H9Se)2Se], consist of niobium(IV) centres each bonded to two 5-coordinated cyclopentadienyl groups and one tert-butylselenolate ligand and are the first organometallic niobium selenolates to be structurally characterized. A bridging oxide or selenide completes the niobium coordination spheres of the discrete dinuclear molecules. In the oxide, the O atom lies on an inversion centre, resulting in a linear Nb-O-Nb linkage, whereas the selenide has a bent bridging group [Nb-Se-Nb = 139.76 (2)°]. The difference is attributable to strong bonding in the oxide case, although the effects on the Nb-C and Nb-SetBu bond lengths are small.
0108-2701
m321
Hector, A.L.
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Jura, M.
e4a8ae2b-5609-45bb-99d8-a2320b9c89b9
Levason, W.
e7f6d7c7-643c-49f5-8b57-0ebbe1bb52cd
Reid, G.
37d35b11-40ce-48c5-a68e-f6ce04cd4037
Reid, S.D.
e2c3e0f2-5bde-4959-bcdd-5e8a54369317
Webster, M.
f26c6e36-cb2e-486e-b2ed-b0d25a3a71f7
Hector, A.L.
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Jura, M.
e4a8ae2b-5609-45bb-99d8-a2320b9c89b9
Levason, W.
e7f6d7c7-643c-49f5-8b57-0ebbe1bb52cd
Reid, G.
37d35b11-40ce-48c5-a68e-f6ce04cd4037
Reid, S.D.
e2c3e0f2-5bde-4959-bcdd-5e8a54369317
Webster, M.
f26c6e36-cb2e-486e-b2ed-b0d25a3a71f7

Hector, A.L., Jura, M., Levason, W., Reid, G., Reid, S.D. and Webster, M. (2008) [{Cp2(tBuSe)Nb}2E] (E= O and Se) with bridging oxide or selenide ligands. Acta Crystallographica Section C: Crystal Structure Communications, 64 (10), m321. (doi:10.1107/S0108270108025055).

Record type: Article

Abstract

The title compounds, -oxido-bis[(tert-butylselenolato)bis(5-cyclopentadienyl)niobium(IV)] toluene solvate, [Nb2(C5H5)4(C4H9Se)2O]·C7H8, and -selenido-bis[(tert-butylselenolato)bis(5-cyclopentadienyl)niobium(IV)], [Nb2(C5H5)4(C4H9Se)2Se], consist of niobium(IV) centres each bonded to two 5-coordinated cyclopentadienyl groups and one tert-butylselenolate ligand and are the first organometallic niobium selenolates to be structurally characterized. A bridging oxide or selenide completes the niobium coordination spheres of the discrete dinuclear molecules. In the oxide, the O atom lies on an inversion centre, resulting in a linear Nb-O-Nb linkage, whereas the selenide has a bent bridging group [Nb-Se-Nb = 139.76 (2)°]. The difference is attributable to strong bonding in the oxide case, although the effects on the Nb-C and Nb-SetBu bond lengths are small.

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More information

Published date: October 2008

Identifiers

Local EPrints ID: 146991
URI: http://eprints.soton.ac.uk/id/eprint/146991
ISSN: 0108-2701
PURE UUID: 9f7f43f1-fddc-4248-bf4c-3d50586f6721
ORCID for A.L. Hector: ORCID iD orcid.org/0000-0002-9964-2163
ORCID for W. Levason: ORCID iD orcid.org/0000-0003-3540-0971
ORCID for G. Reid: ORCID iD orcid.org/0000-0001-5349-3468

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Date deposited: 23 Apr 2010 08:38
Last modified: 20 Jul 2019 01:28

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