The Open Inorganic Chemistry Journal

2008, 2 : 62-68
Published online 2008 June 9. DOI: 10.2174/1874098700802010062
Publisher ID: TOICJ-2-62

Manganese and Cadmium Benzoate Complexes Having 8-Aminoquinoline Ancillary Ligand

Abhilasha Mohan Baruah , Anirban Karmakar and Jubaraj Bikash Baruah
Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781 039 Assam, India.

ABSTRACT

Simple synthetic methods for synthesis of trinuclear manganese(II) benzoate complexes having 8- aminoquinoline as ancillary ligand are reported. The crystal structure of two trinuclear manganese(II) complexes, [Mn3(2- NO2C6H4COO)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(2- NO2C6H4COO)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.

Keywords:

Metal carboxylates, 8-aminoquinoline, manganese trinuclear complexes, cadmium co-ordination polymer.