Binuclear alkylmetallane dioldiates tBu 4M 2(diol–(H)) 2 (M=Al, Ga) and their reactions with aluminium- and gallium trialkyls

Abstract

Reactions of 1,2-di(hydroxymethyl)benzene with t Bu 3M (M=Al, Ga) yield binuclear compounds [ t Bu 4M 2(OCH 2C 6H 4CH 2OH) 2], M=Al ( 1) and M=Ga ( 2) respectively. Compounds 1 and 2 as bifunctional (two OH groups), tetradentate (4O) ligands react with aluminium- and gallium trialkyls with formation of trinuclear products [ t Bu 4XM 3(OCH 2C 6H 4CH 2O) 2] [M=Al, X= t Bu ( 3); M=Ga, X= t Bu ( 4); M=Ga, X=Me ( 6)]. The transmetalation reaction of the compound 6 with one equivalent of Me 3Ga causes the exchange of t Bu 2Ga unit and formation of the new mixed-ligand compound t Bu 2Me 3Ga 3(OCH 2C 6H 4CH 2O) 2 ( 7). The transmetalation reaction is considered as a method of synthesis of mixed-ligand and mixed-metal complexes of Group 13 alkyls with multidentate ligands. The molecular structures of Me 5Al 3(OCH 2C 6H 4CH 2O) 2 ( 5), 6 and 7 have been determined by X-ray crystallography.