The donor-functionalised alkoxides [Et2Ga(OR)]2
(R = CH2CH2NMe2
(1), CH(CH2NMe2)2
(2), CH2CH2OMe (3), CH(CH3)CH2NMe2
(4), C(CH3)2CH2OMe (5)) were synthesised by the 1∶1 reaction of Et3Ga with ROH in hexane or dichloromethane at room temperature. Reaction of Et3Ga with excess ROH in refluxing toluene resulted in the isolation of a 1∶1 mixture of [Et2Ga(OR)]2 and the ethylgallium bisalkoxide [EtGa(OR)2]
(R = CH2CH2NMe2
(6) or CH(CH3)CH2NMe2
(7)). X-ray crystallography showed that compound 6 is monomeric and this complex represents the first structurally characterised monomeric gallium bisalkoxide. Homoleptic gallium trisalkoxides [Ga(OR)3]2 were prepared by the 1∶6 reaction of [Ga(NMe2)3]2 with ROH (R = CH2CH2NMe2
(8), CH(CH3)CH2NMe2
(9), C(CH3)2CH2OMe (10)). The decomposition of compounds 1, 4, 5 and 8 were studied by thermal gravimetric analysis. Low pressure CVD of 1 and 5 resulted in the formation of thin films of crystalline Ga2O3.
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