Issue 9, 2008

Synthesis and structures of gallium alkoxides

Abstract

Homoleptic gallium tris(alkoxides) [Ga(OR)3]2 were prepared by the reaction of [Ga(NMe2)3]2 (1) and excess ROH (R = CH2CH2NMe2 (2), CH(CH3)CH2NMe2 (3), C(CH3)2CH2OMe (4), CH2CH2OMe (5)) in toluene at room temperature. Compounds 2–5 were isolated as colourless oils. The side-products, [Ga(OCH2CH2NMe2)2Cl] (6), [Ga(OCH(CH3)CH2NMe2)2Cl] (7) and [Ga(OC(CH3)2CH2OMe)Cl2]2 (8) were also isolated in low yield during the synthesis of 2, 3 and 4, respectively. However, compounds 6 and 7 were also prepared directly from the reaction of [Ga(NMe2)2Cl] and 2 equivalents of ROH (6, R = CH2CH2NMe2; 7, R = CH(CH3)CH2NMe2). Similarly, compound 8 was isolated from the reaction of [Ga(NMe2)Cl2] and 1 equivalent of HOC(CH3)2CH2OMe. Single crystal X-ray crystallography showed that the gallium bis(alkoxides) (6 and 7) are monomeric in the solid state with the gallium centre adopting a distorted trigonal bipyramidal geometry. In contrast, the gallium mono(alkoxide) 8 is dimeric.

Graphical abstract: Synthesis and structures of gallium alkoxides

Supplementary files

Article information

Article type
Paper
Submitted
29 Jan 2008
Accepted
13 Mar 2008
First published
29 Apr 2008

New J. Chem., 2008,32, 1513-1518

Synthesis and structures of gallium alkoxides

S. Basharat, C. E. Knapp, C. J. Carmalt, S. A. Barnett and D. A. Tocher, New J. Chem., 2008, 32, 1513 DOI: 10.1039/B801579A

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