Diorgano-gallium and -indium complexes with salen ligands: Synthesis, characterization, crystal structure and C-C coupling reactions |
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Authors: | Nisha P Kushwah |
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Institution: | Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India |
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Abstract: | 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 (1H and 13C{1H}) 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. |
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Keywords: | Gallium Indium Phenolate Schiff base X-ray structures |
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