Structure-reactivity correlations in new W(IV) and Nb(IV) silicon-bridged ansa-metallocene hydrides

S L J Conway, M L H Green, Sofia I Pascu, H O Peake

Research output: Contribution to journalArticle

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Abstract

W(IV) and Nb(IV) derivatives: [W(L1)MeH] (1), [W(L1)MeH] (2) and [W(L1)O] (3), [W(L2)Cl-2](4), [W(L2)H-2](5), [W(L2)H-3][BF4] (6), [Nb(L2)Cl-2](7) and [Nb(L2)(eta(2)-BH4)](8), where L1 = [(eta-C5H4)(2)SiMe2](2-) and L2 = [(eta-C5H3TMS)(2)SiMe2](2-), have been prepared and characterised. The crystal structures of compounds 5 and 8 have been determined. Thermodynamic parameters for the elimination of methane from compound 2 have been evaluated based on H-1 NMR studies in C6D6. Trimethylsilyl substituents on the cyclopentadienyl rings appear to moderate the structural and dynamic properties of the silicon-bridged ansa-tungstenocenes.
Original languageEnglish
Pages (from-to)406-420
Number of pages15
JournalPolyhedron
Volume25
Issue number2
DOIs
Publication statusPublished - 2006

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Methane
Silicon
Hydrides
dynamic characteristics
hydrides
elimination
methane
reactivity
Crystal structure
Nuclear magnetic resonance
Thermodynamics
Derivatives
thermodynamics
nuclear magnetic resonance
crystal structure
rings
silicon
metallocene

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Structure-reactivity correlations in new W(IV) and Nb(IV) silicon-bridged ansa-metallocene hydrides. / Conway, S L J; Green, M L H; Pascu, Sofia I; Peake, H O.

In: Polyhedron, Vol. 25, No. 2, 2006, p. 406-420.

Research output: Contribution to journalArticle

Conway, S L J ; Green, M L H ; Pascu, Sofia I ; Peake, H O. / Structure-reactivity correlations in new W(IV) and Nb(IV) silicon-bridged ansa-metallocene hydrides. In: Polyhedron. 2006 ; Vol. 25, No. 2. pp. 406-420.
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AU - Green, M L H

AU - Pascu, Sofia I

AU - Peake, H O

PY - 2006

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AB - W(IV) and Nb(IV) derivatives: [W(L1)MeH] (1), [W(L1)MeH] (2) and [W(L1)O] (3), [W(L2)Cl-2](4), [W(L2)H-2](5), [W(L2)H-3][BF4] (6), [Nb(L2)Cl-2](7) and [Nb(L2)(eta(2)-BH4)](8), where L1 = [(eta-C5H4)(2)SiMe2](2-) and L2 = [(eta-C5H3TMS)(2)SiMe2](2-), have been prepared and characterised. The crystal structures of compounds 5 and 8 have been determined. Thermodynamic parameters for the elimination of methane from compound 2 have been evaluated based on H-1 NMR studies in C6D6. Trimethylsilyl substituents on the cyclopentadienyl rings appear to moderate the structural and dynamic properties of the silicon-bridged ansa-tungstenocenes.

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