186. An investigation of some aryl-aluminium and -gallium compounds

Abstract

The preparation of the new compounds Ph,GaX, (X = C1, Br; n = 1,2) is reported. Both these and the corresponding aluminium chlorides are shown to be dimeric in benzene, and halogen-bridged structures are suggested. Confirmatory evidence is presented for the association of triphenylaluminium in solution as previously observed. The electrical conductances of triphenylgallium, diphenylgallium chloride, and phenylgallium dichloride have been determined over ranges of temperature; the results indicate that these compounds are mainly covalent.

Synthesis and Thermolysis of Alkyl- and Phenylamido Diphenylgallium, [Ph2GaN(H)R]2. Isolation and Structural Characterization of (PhGaNMe)7 and (PhGaNPh)4

“…Synthesis and Characterization of [Ph 2 GaN(H)R] 2 (1 − 5). Triphenylgallium, Ph 3 Ga, was first synthesized by Gilman and Jones 22 in 1940 from the reaction of gallium metal and diphenyl mercury at 130 °C for 50−75 h. These reaction conditions were generally used in later studies. , We prepared Ph 3 Ga in 85% yield from the same reaction within a much shorter time (5 h) at 170 °C.…”

Aryl(dimethyl)gallium Compounds and Methyl(diphenyl)gallium: Synthesis, Structure, and Redistribution Reactions

“…Many homoleptic and heteroleptic compounds have already been synthesized and structurally characterized during the last century . The interest in such molecules is based on their Lewis acid properties and on their potential use as precursors in CVD processes. − The synthesis as well as structural studies of simple homoleptic organogallium(III) compounds such as triphenylgallium − and trimethylgallium − have been reported. In the context of our investigations of substituent redistribution reactions in dialkylgallyl-substituted ferrocene derivatives, we became interested in the properties of the corresponding benzene derivatives.…”

Bis(dimethylamido) Complexes of Alkyl- and Phenylgallium. Useful Precursors to the RGa2+ Synthon

“…Lithium dimethylamide was prepared as a white powder from the reaction of n-butyllithium (Aldrich) and anhydrous dimethylamine (Aldrich). Methylgallium dichloride (MeGaCl2), 10 ethylgallium dichloride (EtGaCl2), 11 n-butylgallium dichloride ( n BuGaCl2), 4 and phenylgallium dichloride (PhGaCl2) 5 were obtained from the ligand exchange reactions reported in the literature.…”

“…A method was needed to differentiate the reactivity of the alkyl from the two other ligands. The known alkyl and aryl dihalides, [RGaX 2 ] 2 , − suffer from the acidity of [NH 4 ]X, which would form as a byproduct in ammonia and which could lead to protonolysis of the desired alkyl ligand. In addition, should the desired oligo- or polymeric organogallium imide be insoluble, separation from [NH 4 ]X might prove difficult.…”