Diorgano-gallium and -indium complexes with N-heterocyclic carboxylic acids: Synthesis, characterization and structures of [Me2M(O2C–C5H4N)]2, M=Ga or In
摘要:
The reaction of triorgano-gallium and -indium etherate with heterocyclic carboxylic acids in benzene at room temperature yields complexes of the type [R2M(L)](n)(M = Ga or In; R = Me or Et; L = 2-(C5H4N)CO2, 2-(C4H3N2)CO2 or 2-(C9H6N)CO2). These complexes have been characterized by elemental analysis, IR, UV-vis, NMR (H-1 and C-13{H-1}) and mass spectral data. Complexes with L = (C5H4N)CO2- and (C9H6N)CO2- showed photoluminescence on excitation with similar to 250 or similar to 310 nm radiation, respectively. Single crystal X-ray structural analysis of [Me2M(O2C-C5H4N-2)](2) (M = Ga or In), revealed a dimeric structure with five-coordinate metal atoms arising from the presence of two tridentate bridging picolinate ligands. (c) 2007 Elsevier B.V. All rights reserved.