title: EPR, IR and electronic spectral studies on Ni(II) and Cu(II) complexes with N-donor tetradentate [N4] macrocyclic ligand.
abstract: Nickel(II) and copper(II) complexes are synthesized with a novel tetradentate macrocyclic ligand, i.e. 2,6,12,16,21,22-hexaaza;3,5,13,15-tetraphenyltricyclo[15,3,1,1(7-11)] docosa;1(21),2,5,7,9,11(22),12,15,17,19-decaene (L) and characterized by the elemental analysis, magnetic susceptibility measurements, mass, 1H NMR, IR, electronic and EPR spectral studies. All the complexes are non-electrolytic in nature. Thus, these may be formulated as [M(L)X2] [M=Ni(II), Cu(II) and X=Cl(-), NO3(-) and (1/2)SO4(2-)]. Ni(II) and Cu(II) complexes show magnetic moments corresponding to two and one unpaired electron, respectively. On the basis of IR, electronic and EPR spectral studies an octahedral geometry has been assigned for Ni(II) and tetragonal geometry for Cu(II) complexes.
authors.affiliation: Department of Chemistry, Zakir Husain College, University of Delhi, JLN-Marg, New Delhi 110002, India. schandra_00@yahoo.com
authors.forename: Sulekh
authors.initials: S
authors.lastname: Chandra
authors.forename: Archana
authors.initials: A
authors.lastname: Gautam
mesh_terms: D003300:Copper / Q000737:chemistry*; D004581:Electronics; D008024:Ligands; D047028:Macrocyclic Compounds / Q000737:chemistry*; D015394:Molecular Structure; D009532:Nickel / Q000737:chemistry*; D017672:Nitrogen Compounds / Q000737:chemistry*; D013057:Spectrum Analysis
chemical_list: D008024:Ligands; D047028:Macrocyclic Compounds; D017672:Nitrogen Compounds; D003300:Copper; D009532:Nickel