Air stable Ni(II) Schiff base complexes viz. [Ni(L1)(PPh3)] and [Ni(L2)(PPh3)] [where L1 and L2 are dianions of Schiff base ligands, respectively] have been synthesized and characterized by analytical and spectral (electronic, FT-IR, 1H, 13C and 31P NMR) methods. The assignment of all the aromatic carbon-hydrogen resonances is made on the basis of 1H-13C HSQC spectrum of the complexes. The Schiff base ligands behave as a bibasic tridentate ligands and bonded through ONO and ONS mode. A square planar structure has been proposed on the basis of spectral data. Novel Ni(II) Schiff base complexes exhibited good antimicrobial activity towards the strains Staphylococcus epidermidis and Escherichia coli. Thermal and air stability of the complexes offer the advantage of oxidation of alcohols.
空气稳定的Ni(II)席夫碱配合物,即[Ni(L1)(PPh3)]和[Ni(
L2)(PPh3)](其中L1和
L2分别为席夫碱
配体的二阴离子),已通过分析和光谱(电子、FT-IR、1H、13C和31P NMR)方法合成并表征。所有芳香碳-氢共振的分配是基于配合物的1H-13C HSQC谱进行的。席夫碱
配体表现为双基三齿
配体,并通过ONO和ONS模式结合。根据光谱数据提出平面正方形结构。新型的Ni(II)席夫碱配合物对表皮葡萄球菌和Escherichia coli菌株显示出良好的抗菌活性。配合物的热稳定性和空气稳定性使其在醇的氧化反应中具有优势。