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Group 3 complexes incorporating (furyl)-substituted disilazide ligands

journal contribution
posted on 2023-06-08, 09:08 authored by Lloyd T J Evans, Martyn P Coles, Geoff Cloke, Peter B Hitchcock
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.

History

Publication status

  • Published

Journal

Inorganica Chimica Acta

ISSN

0020-1693

Publisher

Elsevier

Issue

6

Volume

363

Page range

1114-1125

Department affiliated with

  • Chemistry Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

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