Gallium toluene complexes

Cocatalytic features have been reported for the conjoint action of gallium chloride and hydrogen chloride in the addition of the latter to variousolefins No detailed study of the mechanism of these reactions was however carried out and the interpretation of the results is somewhat complkated by the fact that in both studies toluene was used as solvent, and it is known that hydrc en chloride gives a complex with this aromatic hydrocarbon. 

Gallium can also be determined with Methylene Blue (formula 48.1) [30]. A very sensitive method (e =2-10 ) is based on an extractable (toluene) ion associate of the anionic pyrocatechol complex of gallium and Brilliant Green [31]. 

The first instance of an aluminum trihalide adduct with an Af-heterocyclic carbene was reported in 2004 (phosphanylsilylcarbene adducts had previously been reported [128]). The adduct and its gallium analog were prepared from the reaction of ImMe4 with aluminum trichloride or gallium trichloride in toluene the aluminum complex was crystallographically characterized [129]. Later, NHC adducts of AII3 were also structurally characterized [130]. 

A rare example of a diruthenium complex with gallium ligands is provided by compound 16, which is formed from the reaction of Ru3(CO)i2 with Ga2Cl4 in the presence of gallium metal in refluxing toluene. Crystallization from tetrahydrofuran provides the solvated species shown below. ... 

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