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Syntheses, X-ray structures and CVD of titanium(IV) arsine complexes

Thomas, T; Pugh, D; Parkin, IP; Carmalt, CJ; (2010) Syntheses, X-ray structures and CVD of titanium(IV) arsine complexes. DALTON T , 39 (22) 5325 - 5331. 10.1039/c001359e.

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Abstract

Five titanium arsine compounds have been synthesised via the reaction of TiCl4 with AsPh3 (1 : 1 and 1 : 2 equivalents), or one equivalent of Ph2AsCH2AsPh2, (BuAsH2)-Bu-t and As(NMe2)(3). In general, 1 : 1 and 1 : 2 adducts of the type [TiCl4(L)(n)] (n = 1, L = AsPh3, Ph2AsCH2AsPh2, and (BuAsH2)-Bu-t; n = 2, L = AsPh3), were isolated and characterised. However, the reaction of TiCl4 with As(NMe2)(3) resulted in a novel exchange between a Cl and an NMe2 group, yielding the product [TiCl3(NMe2)(mu-NMe2)(2)AsCl]. The crystal structure of [TiCl3(NMe2)(mu-NMe2)(2)AsCl] has been determined and showed that the titanium and arsenic atoms are linked via two bridging NMe2 groups. Additionally, crystal structures for the 1 : 1 and 1 : 2 adducts, [TiCl4(AsPh3)] and [TiCl4(AsPh3)(2)] have been obtained, with Ti-As bond lengths of 2.7465(13) and 2.7238(7) angstrom observed respectively. The decomposition of the compounds has been investigated using thermogravimetric analysis, aerosol-assisted and low pressure chemical vapour deposition.

Type:Article
Title:Syntheses, X-ray structures and CVD of titanium(IV) arsine complexes
DOI:10.1039/c001359e
Keywords:CHEMICAL-VAPOR-DEPOSITION, THIN-FILMS, IMIDO COMPLEXES, PRECURSOR, PHOSPHIDE, ARSENIDE, HALIDES, TRISDIMETHYLAMINOARSINE, COMPOUND, NITRIDE
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry

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