Group 3 complexes incorporating (furyl)-substituted disilazide ligands

Evans, Lloyd T J, Coles, Martyn P, Cloke, F Geoffrey N and Hitchcock, Peter B (2010) Group 3 complexes incorporating (furyl)-substituted disilazide ligands. Inorganica Chimica Acta, 363 (6). pp. 1114-1125. ISSN 0020-1693

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A series of mono- and bis-amide scandium and yttrium compounds incorporating the furyl-substituted disilazide ligand, [N{SiMe2R}2] {i} (where R = 2-methylfuryl) have been synthesized. The compounds Sc{i}Cl2 (1), Sc{i}(CH2SiMe3)2 (2) and Sc{i}(OAr)2 (3) were made from suitable scandium starting materials employing either a salt metathesis protocol with Li{i} or via protonolysis of ScC bonds by the neutral amine H{i}. The thermally unstable bis-alkyl yttrium compound, Y{i}(CH2SiMe3)2 was isolated as the bis-adduct (4) and the bis-aryloxide Y{i}(OAr)2 (5) was synthesized by elimination of LiOAr from Y(OAr)3. The bis-amide complex Y{i}2Cl (6) and conversion to a rare example of an yttrium benzyl compound Y{i}2(CH2Ph) (7) are described. The yttrium cation, [Y{i}2]+, was synthesized by benzyl abstraction from 7 using B(C6F5)3. Structural characterization of representative examples show variation in the coordination modes for amide ligand {i}, differing primarily in the number of furyl groups that coordinate to the metal, with examples in which zero, one or two MOfuryl bonds are present. Preliminary investigation in two areas of catalysis are presented.

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
Depositing User: Lloyd Trevor John Evans
Date Deposited: 06 Feb 2012 21:11
Last Modified: 29 Mar 2012 09:18
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