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Document Details
Document Type
:
Article In Journal
Document Title
:
Crystal structures of organometallic compounds of lithium and magnesium containing the bulky ligands C(SiMe3)(2)(SiMe2X) X = Me, Ph, NMe2, or C5H4N-2
Crystal structures of organometallic compounds of lithium and magnesium containing the bulky ligands C(SiMe3)(2)(SiMe2X) X = Me, Ph, NMe2, or C5H4N-2
Document Language
:
Arabic
Abstract
:
The complex [Li(TMEDA) {C(SiMe3)(2)SiMe(2)NMe2}] (1) (TMEDA = N,N,N,N-tetramethylethane-1,2,-diamine) was found to crystallise with an internally coordinated structure like that of [Li(THF)(2){C(SiMe3)(2)SiMe2Me2}] (THF = tetrahydrfuran). In contrast, the compound with Ph in place of NMe2 crystallised as a dialkyllithate [Li(TMEDA)(2)][Li{C(SiME3)(2)(SiMe2Ph)}(2)] (4). The reaction of 4 with MgBr2 gave the doubly bromide-bridged lithium-magnesium complex [Li(TMEDA)(mu -Br)(2)Mg{C(SiMe3)(2)(SiMe2Ph)} (THF)] (6), and that of [Li(THF){C(SiMe3)(2)(SiMe2C5H4N-2)}] gave the singly bridged compound [Li(THF)(3)(mu -Br)MgBr{C(SiMe3)(2)(SiMe2C5H4N-2)] (8). The Grignard reagents [Mg{C(SiMe3)(3)}I(OEt2)](2) (10) and [Mg{C(SiMe3)(2) (SiMe2Ph)} I(OEt2)](2) (11) were obtained from the reactions between (Me3Si)(3)CI and (Me2Ph)(Me3Si)CI, respectively, with magnesium metal and shown to have halide-bridged structures. The unsymmetrical dialkylmagnesium [MgBu{C(SiMe3)(2)(SiMe2NMe2)}(THF)] (13), was prepared from a mixture of LiBu, 1 and [MgBr2(OEt2)(2)]. (C) 2001 Elsevier Science B.V. All rights reserved.
Journal Name
:
JOURNAL OF ORGANOMETALLIC CHEMISTRY
Volume
:
631
Issue Number
:
1
Publishing Year
:
2001 AH
Added Date
:
Saturday, June 14, 2008
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
صالح بن سـالــم نـافـل الجعيـــد
Al-Juaid SS
Researcher
saljuaid@kau.edu.sa
.
Avent AG
Researcher
.
Eaborn C
Researcher
.
Hawkes SA
Researcher
.
Hill MS
Researcher
.
Hopman M
Researcher
.
Hitchcock PB
Researcher
.
Smith JD
Researcher
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