Spectroscopic studies on Co(II), Ni(II), Cu(II) and Zn(II) complexes with a N4-macrocylic ligands
摘要:
Complexes of cobalt(II), nickel(II), copper(II) and zinc(II) with a new tetraaza macrocyclic ligand have been synthesized and characterized by microanalyses, molar conductance, magnetic susceptibility, mass, thermogravimetric (TGA), IR, H-1 and C-13 NMR, electronic and ESR spectral studies. All the complexes are found to have the formula [MLX2]center dot nH(2)O and are six-coordinated with distorted octahedral geometry. (C) 2007 Elsevier B.V. All rights reserved.
Non-template synthesis of ‘N4’ di- and tetra-amide macrocylic ligands with variable ring sizes
摘要:
Nine new macrocyclic ligands containing two- or four-amide groups have been prepared by the cyclization reaction of three different diamines with acid chlorides (oxalyl dichloride or malonyl dichloride), diesters (diethyl oxalate or diethyl malonate) or 1,2-dichloroethane. The macrocycles prepared are four tetraaza-14-crown-4, four tetraaza-15-crown-4 and one tetraaza-16-crown-4. All the macrocyclic ligands were characterized by elemental analysis and, IR, UV, NMR and mass spectral investigations. (C) 2003 Elsevier Ltd. All rights reserved.