Synthesis and crystal structures of some cobalt halide derivatives containing alkyl or silanolato groups

Ashrafolmolouk Asadi; Colin Eaborn; Michael S. Hill; Peter B. Hitchcock; J. David Smith

doi:10.1016/j.jorganchem.2004.10.043

Synthesis and crystal structures of some cobalt halide derivatives containing alkyl or silanolato groups

Ashrafolmolouk Asadi, Colin Eaborn, Michael S. Hill, Peter B. Hitchcock, J. David Smith

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

14 Citations (SciVal)

Abstract

The alkylcobalt halide [{(2-C₅H₄N)Me ₂Si}(Me₃Si)₂CCoCl]₂ (2) and the lithium silanolatocobaltates Li(THF)₂(μ-Br)₂Co(μ- OSiMe₃)₂Co(μ-Br)₂Li(THF)₂ (4) and [LiBr{Li(THF)}₂{CoBr(OSiMe₃)₃}]₂ (5) form centrosymmetrical halogen-bridged dimers in the crystalline state. Compound 4 shows bromide bridges between lithium and cobalt, and silanolato bridges between the cobalt atoms. Below 200 K there are significant antiferromagnetic interactions between the cobalt centres. Compound 5 crystallises in a novel structure in which two cubane-like fragments containing silanolato bridges are linked together through a Li₂Br₂ ring.

Original language	English
Pages (from-to)	944-951
Number of pages	8
Journal	Journal of Organometallic Chemistry
Volume	690
Issue number	4
DOIs	https://doi.org/10.1016/j.jorganchem.2004.10.043
Publication status	Published - 14 Feb 2005

Keywords

Clusters
Cobalt halides
Magnetic measurements
Organosilicon
Silanolato derivatives

ASJC Scopus subject areas

Biochemistry
Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1016/j.jorganchem.2004.10.043

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title = "Synthesis and crystal structures of some cobalt halide derivatives containing alkyl or silanolato groups",

abstract = "The alkylcobalt halide [{(2-C5H4N)Me 2Si}(Me3Si)2CCoCl]2 (2) and the lithium silanolatocobaltates Li(THF)2(μ-Br)2Co(μ- OSiMe3)2Co(μ-Br)2Li(THF)2 (4) and [LiBr{Li(THF)}2{CoBr(OSiMe3)3}]2 (5) form centrosymmetrical halogen-bridged dimers in the crystalline state. Compound 4 shows bromide bridges between lithium and cobalt, and silanolato bridges between the cobalt atoms. Below 200 K there are significant antiferromagnetic interactions between the cobalt centres. Compound 5 crystallises in a novel structure in which two cubane-like fragments containing silanolato bridges are linked together through a Li2Br2 ring.",

keywords = "Clusters, Cobalt halides, Magnetic measurements, Organosilicon, Silanolato derivatives",

author = "Ashrafolmolouk Asadi and Colin Eaborn and Hill, {Michael S.} and Hitchcock, {Peter B.} and Smith, {J. David}",

year = "2005",

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doi = "10.1016/j.jorganchem.2004.10.043",

language = "English",

volume = "690",

pages = "944--951",

journal = "Journal of Organometallic Chemistry",

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TY - JOUR

T1 - Synthesis and crystal structures of some cobalt halide derivatives containing alkyl or silanolato groups

AU - Asadi, Ashrafolmolouk

AU - Eaborn, Colin

AU - Hill, Michael S.

AU - Hitchcock, Peter B.

AU - Smith, J. David

PY - 2005/2/14

Y1 - 2005/2/14

N2 - The alkylcobalt halide [{(2-C5H4N)Me 2Si}(Me3Si)2CCoCl]2 (2) and the lithium silanolatocobaltates Li(THF)2(μ-Br)2Co(μ- OSiMe3)2Co(μ-Br)2Li(THF)2 (4) and [LiBr{Li(THF)}2{CoBr(OSiMe3)3}]2 (5) form centrosymmetrical halogen-bridged dimers in the crystalline state. Compound 4 shows bromide bridges between lithium and cobalt, and silanolato bridges between the cobalt atoms. Below 200 K there are significant antiferromagnetic interactions between the cobalt centres. Compound 5 crystallises in a novel structure in which two cubane-like fragments containing silanolato bridges are linked together through a Li2Br2 ring.

AB - The alkylcobalt halide [{(2-C5H4N)Me 2Si}(Me3Si)2CCoCl]2 (2) and the lithium silanolatocobaltates Li(THF)2(μ-Br)2Co(μ- OSiMe3)2Co(μ-Br)2Li(THF)2 (4) and [LiBr{Li(THF)}2{CoBr(OSiMe3)3}]2 (5) form centrosymmetrical halogen-bridged dimers in the crystalline state. Compound 4 shows bromide bridges between lithium and cobalt, and silanolato bridges between the cobalt atoms. Below 200 K there are significant antiferromagnetic interactions between the cobalt centres. Compound 5 crystallises in a novel structure in which two cubane-like fragments containing silanolato bridges are linked together through a Li2Br2 ring.

KW - Clusters

KW - Cobalt halides

KW - Magnetic measurements

KW - Organosilicon

KW - Silanolato derivatives

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U2 - 10.1016/j.jorganchem.2004.10.043

DO - 10.1016/j.jorganchem.2004.10.043

M3 - Article

AN - SCOPUS:13444301198

SN - 0022-328X

VL - 690

SP - 944

EP - 951

JO - Journal of Organometallic Chemistry

JF - Journal of Organometallic Chemistry

IS - 4

ER -

Synthesis and crystal structures of some cobalt halide derivatives containing alkyl or silanolato groups

Abstract

Keywords

ASJC Scopus subject areas

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