名称:
Diorgano-gallium and -indium complexes with salen ligands: Synthesis, characterization, crystal structure and C–C coupling reactions
摘要:
The reactions of triorgano-gallium and -indium etherate with salen ligands in benzene afforded complexes of the type [R2MOC6H4CR'=NCH2-](2), (R/M/R' = Me/Ga/H (1), Et/Ga/H (2), Me/In/H (3), Et/Ga/Me (4)) in nearly quantitative yields. These complexes have been characterized by elemental analysis, IR, UV-Vis, NMR (H-1 and C-13{H-1}) and mass spectral data. The organogallium complexes showed photoluminescence in blue-green region. The complex, [(Me2Ga)(2)(O-(C6H4)CH=N-CH2-)(2)] on recrystallization from benzene-hexane and dichloromethane gave orthorhombic and monoclinic forms, respectively. Both the forms are dimeric with gallium atoms acquiring a distorted tetrahedral configuration defined by two methyl groups, phenolate oxygen and azomethene nitrogen. The complexes [(Me2Ga)(2)(O-(C6H4)CH=N-CH2-)(2)] and [(Me2In)(2)(O-(C6H4)CH=N-CH2-)(2)] have been employed as alkylating agent for C-C coupling reaction of 1-bromonaphthalene in presence of PdCl2(PPh3)(2). (C) 2009 Elsevier B.V. All rights reserved.