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 TypeDr GradeEmail
صالح بن سـالــم نـافـل الجعيـــدAl-Juaid SSResearcher saljuaid@kau.edu.sa
. Avent AGResearcher  
.Eaborn CResearcher  
.Hawkes SAResearcher  
.Hill MSResearcher  
.Hopman MResearcher  
.Hitchcock PBResearcher  
.Smith JD Researcher  

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