Synthesis and structure of N-salicylidene-o-aminophenolato gallium(III) complexes

The reactions of Ga(acac)3 with N-salicylidene-o-aminophenol (saphH2) and its 5-methyl (5MesaphH2) and 5-bromo (5BrsaphH2) derivatives in alcohols afforded the complexes [Ga(acac)(saph)(EtOH)] (1), [Ga(acac)(5Mesaph)(MeOH)] (2) and [Ga(acac)(5Brsaph)(EtOH)] (3), respectively, in good yields. The crystal structures of 1 and 2 have been solved by single-crystal X-ray crystallography. All three complexes are mononuclear with the GaIII atoms being surrounded by a dianionic tridentate Schiff base ligand, one bidentate acac− ligand and a terminal alcohol molecule. Characteristic IR data are discussed in terms of the nature of bonding and the structures of the three complexes.

Graphical abstractReactions of Ga(acac)3 with N-salicylidene-o-aminophenol (saphH2) and its 5-methyl and 5-bromo derivatives in alcohols (ROH) resulted in three mononuclear complexes with the general formula [Ga(acac)(5Rsaph)(ROH)]. The structures of the saph2− and 5Mesaph2− were determined with single-crystal X-ray crystallography while all complexes were characterized by IR spectroscopy and elemental analysis.Figure optionsDownload full-size imageDownload as PowerPoint slide