Synthesis, characterization and antibacterial activity of cobalt(III) complexes with pyridine–amide ligands
作者:Anurag Mishra、Nagendra K. Kaushik、Akhilesh K. Verma、Rajeev Gupta
DOI:10.1016/j.ejmech.2007.08.015
日期:2008.10
have been used to synthesize kinetically stable cobalt(III) compounds [Co(L1-3)3] (1-3) and Na[Co(L4-6)2] (4-6), respectively. The Co(III) ion is in octahedral environment and is surrounded by three bidentate ligands in complexes 1-3 and two tridentate ligands in complexes 4-6. Ligands coordinate the cobalt center via amidic-N and pyridine-N centers forming a 5-membered chelate ring. Complexes 1-6 have
配体2-(N-(X-吡啶基)氨基甲酰基)吡啶(对于HL1-HL3分别为X = 2、3或4)和2,6-双(N-(Y-吡啶基)氨基甲酰基)吡啶(Y =单去质子化和双去质子化的H2L4-H2L6分别为2,3或4)已用于合成动力学稳定的钴(III)化合物[Co(L1-3)3](1-3)和Na [ Co(L4-6)2](4-6)。Co(III)离子处于八面体环境中,在配合物1-3中被三个二齿配体包围,在配合物4-6中被两个三齿配体包围。配体通过氨基-N和吡啶-N中心配位钴中心,形成5元螯合环。配合物1-6已通过各种光谱分析(1H NMR,13C NMR,UV-vis,IR,质量),元素分析和电导率测量进行了全面表征。所有复合物均已针对临床分离的假单胞菌,变形杆菌,大肠杆菌和铜绿假单胞菌的标准菌株(MTCC 1688),弗氏志贺氏菌(MTCC 1457),植物克雷伯氏菌(MTCC 2272)的体外抗菌