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Synthesis, crystal structure and antibacterial activity of a group of mononuclear manganese(II) Schiff base complexes |
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| Authors: | Santanu MandalTapan Kumar Karmakar Anupam GhoshMichel Fleck Debasis Bandyopadhyay |
| Institution: | a Department of Chemistry, Bankura Christian College, Bankura, West Bengal, India b Department of Chemistry, D.N. College, Aurangabad, Murshidabad, West Bengal, India c Department of Zoology, Bankura Christian College, Bankura, West Bengal, India d Institute of Mineralogy and Crystallography Geozentrum, University of Vienna, Althanstrasse 14 A-1090 Vienna, Austria |
| Abstract: | Five mononuclear complexes of manganese(II) of a group of the general formula, MnL(NCS)2] where the Schiff base L = N,N′-bis(pyridin-2-yl)ethylidene]ethane-1,2-diamine (L1), (1); N,N′-bis(pyridin-2-yl)benzylidene]ethane-1,2-diamine (L2), (2); N,N′-bis(pyridin-2-yl)methylidene]propane-1,2-diamine (L3), (3); N,N′-bis(pyridin-2-yl)ethylidene]propane-1,2-diamine (L4), (4) and N,N′-bis(pyridin-2-yl)benzylidene]propane-1,2-diamine (L5), (5) have been prepared. The syntheses have been achieved by reacting manganese chloride with the corresponding tetradentate Schiff bases in presence of thiocyanate in the molar ratio of 1:1:2. The complexes have been characterized by IR spectroscopy, elemental analysis and other physicochemical studies, including crystal structure determination of 1, 2 and 4. Structural studies reveal that the complexes 1, 2 and 4 adopt highly distorted octahedral geometry. The antibacterial activity of all the complexes and their respective Schiff bases has been tested against Gram(+) and Gram(−) bacteria. |
| Keywords: | Manganese(II) Schiff base Crystal structure Antibacterial activity |
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