Syntheses of some bulky alkylalanes and alkyltrihydroaluminates: Crystal structures of [Li(THF)2AlH3C(SiMe3)2(SiMe 2NMe2)]2, Li(THF)2Al2H5(C(SiMe3) 3)2, (Me3Si)3CAlH2·THF and the pyrazolato derivative

Colin Eaborn; Salima M. El-Hamruni; Michael S. Hill; Peter B. Hitchcock; Martijn Hopman; Armelle Le Gouic; J. David Smith

doi:10.1016/S0022-328X(99)00507-0

Syntheses of some bulky alkylalanes and alkyltrihydroaluminates: Crystal structures of [Li(THF)₂AlH₃C(SiMe₃)₂(SiMe ₂NMe₂)]₂, Li(THF)₂Al₂H₅(C(SiMe₃) ₃)₂, (Me₃Si)₃CAlH₂·THF and the pyrazolato derivative

Colin Eaborn, Salima M. El-Hamruni, Michael S. Hill, Peter B. Hitchcock, Martijn Hopman, Armelle Le Gouic, J. David Smith

University of Sussex

Research output: Contribution to journal › Article › peer-review

20 Citations (SciVal)

Abstract

The alkylaluminate [Li(THF)₂AlH₃C(SiMe₃)₂(SiMe ₂NMe₂)]₂ (3), obtained by the reaction between [LiC(SiMe₃)₂(SiMe₂NMe₂)·2THF] and LiAlH₄, has a cyclic structure like those of the compounds [Li(THF)₂AlH₃R]₂ (R=C(SiMe₃)₃ (1), or C(SiMe₂Ph)₃ (2)). The Al and Li atoms are linked by hydride bridges and the NMe₂ groups are not coordinated to metal centres. The compound 1 reacts (i) with one equivalent of SiMe₃Cl to give the cyclic dialuminate Li(THF)2(μ-H)AlHR(μ-H)AlHRH (4) (characterised by an X-ray study); (ii) with two equivalents of SiMe₃Cl to give the alane-THF complex (Me₃Si)₃CAlH₂·THF (5); and (iii) with an excess of pyrazole to give [LiAlH(C₃H₃N₂)₂C(SiMe ₃)₃]₂ (7), in which Al and Li atoms are linked by both hydride and pyrazolato bridges. The compound (Me₂PhSi)₃CAlH₂·THF (6) has been obtained by the reaction of 2 with two equivalents of SiMe₃Cl.

Original language	English
Pages (from-to)	3-9
Number of pages	7
Journal	Journal of Organometallic Chemistry
Volume	597
Issue number	1-2
DOIs	https://doi.org/10.1016/S0022-328X(99)00507-0
Publication status	Published - 15 Mar 2000

Keywords

Alkylalanes
Aluminium
Lithium
Pyrazolato

ASJC Scopus subject areas

Biochemistry
Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry
Materials Chemistry

Access to Document

10.1016/S0022-328X(99)00507-0

Cite this

Eaborn, C., El-Hamruni, S. M., Hill, M. S., Hitchcock, P. B., Hopman, M., Le Gouic, A., & Smith, J. D. (2000). Syntheses of some bulky alkylalanes and alkyltrihydroaluminates: Crystal structures of [Li(THF)₂AlH₃C(SiMe₃)₂(SiMe ₂NMe₂)]₂, Li(THF)₂Al₂H₅(C(SiMe₃) ₃)₂, (Me₃Si)₃CAlH₂·THF and the pyrazolato derivative. Journal of Organometallic Chemistry, 597(1-2), 3-9. https://doi.org/10.1016/S0022-328X(99)00507-0

Syntheses of some bulky alkylalanes and alkyltrihydroaluminates: Crystal structures of [Li(THF)₂AlH₃C(SiMe₃)₂(SiMe ₂NMe₂)]₂, Li(THF)₂Al₂H₅(C(SiMe₃) ₃)₂, (Me₃Si)₃CAlH₂·THF and the pyrazolato derivative. / Eaborn, Colin; El-Hamruni, Salima M.; Hill, Michael S. et al.
In: Journal of Organometallic Chemistry, Vol. 597, No. 1-2, 15.03.2000, p. 3-9.

Research output: Contribution to journal › Article › peer-review

Eaborn, C, El-Hamruni, SM, Hill, MS, Hitchcock, PB, Hopman, M, Le Gouic, A & Smith, JD 2000, 'Syntheses of some bulky alkylalanes and alkyltrihydroaluminates: Crystal structures of [Li(THF)₂AlH₃C(SiMe₃)₂(SiMe ₂NMe₂)]₂, Li(THF)₂Al₂H₅(C(SiMe₃) ₃)₂, (Me₃Si)₃CAlH₂·THF and the pyrazolato derivative', Journal of Organometallic Chemistry, vol. 597, no. 1-2, pp. 3-9. https://doi.org/10.1016/S0022-328X(99)00507-0

Eaborn C, El-Hamruni SM, Hill MS, Hitchcock PB, Hopman M, Le Gouic A et al. Syntheses of some bulky alkylalanes and alkyltrihydroaluminates: Crystal structures of [Li(THF)₂AlH₃C(SiMe₃)₂(SiMe ₂NMe₂)]₂, Li(THF)₂Al₂H₅(C(SiMe₃) ₃)₂, (Me₃Si)₃CAlH₂·THF and the pyrazolato derivative. Journal of Organometallic Chemistry. 2000 Mar 15;597(1-2):3-9. doi: 10.1016/S0022-328X(99)00507-0

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title = "Syntheses of some bulky alkylalanes and alkyltrihydroaluminates: Crystal structures of [Li(THF)2AlH3C(SiMe3)2(SiMe 2NMe2)]2, Li(THF)2Al2H5(C(SiMe3) 3)2, (Me3Si)3CAlH2·THF and the pyrazolato derivative",

abstract = "The alkylaluminate [Li(THF)2AlH3C(SiMe3)2(SiMe 2NMe2)]2 (3), obtained by the reaction between [LiC(SiMe3)2(SiMe2NMe2)·2THF] and LiAlH4, has a cyclic structure like those of the compounds [Li(THF)2AlH3R]2 (R=C(SiMe3)3 (1), or C(SiMe2Ph)3 (2)). The Al and Li atoms are linked by hydride bridges and the NMe2 groups are not coordinated to metal centres. The compound 1 reacts (i) with one equivalent of SiMe3Cl to give the cyclic dialuminate Li(THF)2(μ-H)AlHR(μ-H)AlHRH (4) (characterised by an X-ray study); (ii) with two equivalents of SiMe3Cl to give the alane-THF complex (Me3Si)3CAlH2·THF (5); and (iii) with an excess of pyrazole to give [LiAlH(C3H3N2)2C(SiMe 3)3]2 (7), in which Al and Li atoms are linked by both hydride and pyrazolato bridges. The compound (Me2PhSi)3CAlH2·THF (6) has been obtained by the reaction of 2 with two equivalents of SiMe3Cl.",

keywords = "Alkylalanes, Aluminium, Lithium, Pyrazolato",

author = "Colin Eaborn and El-Hamruni, {Salima M.} and Hill, {Michael S.} and Hitchcock, {Peter B.} and Martijn Hopman and {Le Gouic}, Armelle and Smith, {J. David}",

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T1 - Syntheses of some bulky alkylalanes and alkyltrihydroaluminates

T2 - Crystal structures of [Li(THF)2AlH3C(SiMe3)2(SiMe 2NMe2)]2, Li(THF)2Al2H5(C(SiMe3) 3)2, (Me3Si)3CAlH2·THF and the pyrazolato derivative

AU - Eaborn, Colin

AU - El-Hamruni, Salima M.

AU - Hill, Michael S.

AU - Hitchcock, Peter B.

AU - Hopman, Martijn

AU - Le Gouic, Armelle

AU - Smith, J. David

PY - 2000/3/15

Y1 - 2000/3/15

N2 - The alkylaluminate [Li(THF)2AlH3C(SiMe3)2(SiMe 2NMe2)]2 (3), obtained by the reaction between [LiC(SiMe3)2(SiMe2NMe2)·2THF] and LiAlH4, has a cyclic structure like those of the compounds [Li(THF)2AlH3R]2 (R=C(SiMe3)3 (1), or C(SiMe2Ph)3 (2)). The Al and Li atoms are linked by hydride bridges and the NMe2 groups are not coordinated to metal centres. The compound 1 reacts (i) with one equivalent of SiMe3Cl to give the cyclic dialuminate Li(THF)2(μ-H)AlHR(μ-H)AlHRH (4) (characterised by an X-ray study); (ii) with two equivalents of SiMe3Cl to give the alane-THF complex (Me3Si)3CAlH2·THF (5); and (iii) with an excess of pyrazole to give [LiAlH(C3H3N2)2C(SiMe 3)3]2 (7), in which Al and Li atoms are linked by both hydride and pyrazolato bridges. The compound (Me2PhSi)3CAlH2·THF (6) has been obtained by the reaction of 2 with two equivalents of SiMe3Cl.

AB - The alkylaluminate [Li(THF)2AlH3C(SiMe3)2(SiMe 2NMe2)]2 (3), obtained by the reaction between [LiC(SiMe3)2(SiMe2NMe2)·2THF] and LiAlH4, has a cyclic structure like those of the compounds [Li(THF)2AlH3R]2 (R=C(SiMe3)3 (1), or C(SiMe2Ph)3 (2)). The Al and Li atoms are linked by hydride bridges and the NMe2 groups are not coordinated to metal centres. The compound 1 reacts (i) with one equivalent of SiMe3Cl to give the cyclic dialuminate Li(THF)2(μ-H)AlHR(μ-H)AlHRH (4) (characterised by an X-ray study); (ii) with two equivalents of SiMe3Cl to give the alane-THF complex (Me3Si)3CAlH2·THF (5); and (iii) with an excess of pyrazole to give [LiAlH(C3H3N2)2C(SiMe 3)3]2 (7), in which Al and Li atoms are linked by both hydride and pyrazolato bridges. The compound (Me2PhSi)3CAlH2·THF (6) has been obtained by the reaction of 2 with two equivalents of SiMe3Cl.

KW - Alkylalanes

KW - Aluminium

KW - Lithium

KW - Pyrazolato

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