Manganese and Cadmium Benzoate Complexes Having 8-Aminoquinoline Ancillary Ligand

Abstract

Simple synthetic methods for synthesis of trinuclear manganese(II) benzoate complexes having 8aminoquinoline as ancillary ligand are reported. The crystal structure of two trinuclear manganese(II) complexes, [Mn3(2NO2C6H4COO)6(AQ)2] (I) and [Mn3(3-CH3C6H4COO)6(AQ)2].NPD (II) is reported (where AQ = 8-aminoquinoline, NPD = 1,5 dihydroxynaphthalene). In solution, the degradation of trinuclear complex I leads to a dinuclear complex [Mn2(2NO2C6H4COO)4(AQ)2 (H2O)2] (III) and structure of complex III is reported. A solution phase synthetic method for the synthesis of the dinuclear manganese(II) complex III is also reported. This complex has a Mn2O2 bridge originating from the carboxylate ligand. Synthesis of a cadmium 2-nitrobenzoate co-ordination polymer [Cd(2-NO2C6H4COO)2(AQ)]n (IV) having eight co-ordination number is reported and its structure is explained as aggregation of multiple numbers of six coordinated mononuclear cadmium complexes.