Chandra Sulekh, Gupta Lokesh Kumar
Department of Chemistry, Zakir Husain College, University of Delhi, JLN-Marg, New Delhi 110002, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2005 Jul;61(9):2139-44. doi: 10.1016/j.saa.2004.06.060.
The complexes of Cr(III), Mn(II), Fe(III) and Cu(II) were synthesized with the macrocyclic ligand i.e. 2,3,9,10-tetraketo-1,4,8,11-tetraazacyclotetradecane. The ligand was prepared by the [2 + 2] condensation reaction of diethyloxalate and 1,3-diamino propane. These complexes were found to have the general composition M(L)X3 and M'(L)X2 [where M = Mn(II) and Cu(II), M' = Cr(III) and Fe(III), L = ligand (N4) and X = Cl-, NO3-, 1/2SO4(2-) and [CH3COO-]. The ligand and its transition metal complexes were characterized by the elemental analyses, molar conductance, magnetic susceptibility, mass, IR, electronic, and EPR spectral studies. On the basis of IR, electronic and EPR spectral studies an octahedral geometry has been assigned for Cr(III), Mn(II) and Fe(III) and a tetragonal geometry for Cu(II) complexes.
铬（III）、锰（II）、铁（III）和铜（II）的配合物是用大环配体即2,3,9,10-四酮-1,4,8,11-四氮杂环十四烷合成的。该配体是通过草酸二乙酯与1,3-二氨基丙烷的[2 + 2]缩合反应制备的。发现这些配合物具有通式M(L)X3和M'(L)X2 [其中M = 锰（II）和铜（II），M' = 铬（III）和铁（III），L = 配体（N4）且X = Cl-、NO3-、1/2SO4(2-)和[CH3COO-]。通过元素分析、摩尔电导率、磁化率、质谱、红外光谱、电子光谱和电子顺磁共振光谱研究对配体及其过渡金属配合物进行了表征。基于红外光谱、电子光谱和电子顺磁共振光谱研究，已为铬（III）、锰（II）和铁（III）配合物指定了八面体几何构型，为铜（II）配合物指定了四方几何构型。
