title: Copper(II) complexes of new biomimetic polydentate amide ligands: a spectroscopic study.
abstract: Complexes of Cu(II) with N,N'-bis(3-carboxy-1-oxopropanyl)-1,2-ethylenediamine(C(10)H(16)N(2)O(6),L(1)), N,N'-bis(3-carboxy-1-oxopropanyl)-1,2-phenylenediamine(C(14)H(16)N(2)O(6),L(2)), N,N'-bis(2-carboxy-1-oxophenelenyl)-1,2-phenylenediamine(C(22)H(16)N(2)O(6),L(3)) and N,N'-bis(3-carboxy-1-oxoprop-2-enyl)-1,2-phenylenediamine(C(14)H(12)N(2)O(6),L(4)) have been prepared and characterised by elemental analyses, vibrational spectra, magnetic susceptibility measurements, ligand field spectra, EPR spectra, thermal studies and X-ray diffraction spectra. Vibrational spectra indicate coordination of amide and carboxylate oxygens of the ligands giving a MO(4) square planar chromophore. Ligand field and EPR spectra support square planar geometry around Cu(II). [Cu(L(1))] complex has the maximum activation energy and [Cu(L(3))] complex has the minimum activation energy.
authors.affiliation: Department of Chemistry, University of Delhi, Delhi 110 007, India.
authors.forename: Bhagwan S
authors.initials: BS
authors.lastname: Garg
authors.forename: Deo Nandan
authors.initials: DN
authors.lastname: Kumar
authors.forename: Meenu
authors.initials: M
authors.lastname: Sarbhai
mesh_terms: D040761:Biomimetic Materials / Q000737:chemistry*; D002413:Cations, Divalent / Q000737:chemistry; D003300:Copper / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy; D008024:Ligands; D008280:Magnetics; D015394:Molecular Structure; D010655:Phenylenediamines / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013696:Temperature; D014732:Vibration; D014961:X-Ray Diffraction
chemical_list: D002413:Cations, Divalent; D008024:Ligands; D010655:Phenylenediamines; D003300:Copper