title: Crystal structure of nonadentate tricompartmental ligand derived from pyridine-2,6-dicarboxylic acid: Spectroscopic, electrochemical and thermal investigations of its transition metal(II) complexes.
abstract: The coordinating behavior of a new dihydrazone ligand, 2,6-bis[(3-methoxysalicylidene)hydrazinocarbonyl]pyridine towards manganese(II), cobalt(II), nickel(II), copper(II), zinc(II) and cadmium(II) has been described. The metal complexes were characterized by magnetic moments, conductivity measurements, spectral (IR, NMR, UV-Vis, FAB-Mass and EPR) and thermal studies. The ligand crystallizes in triclinic system, space group P-1, with α=98.491(10)°, β=110.820(10)° and γ=92.228(10)°. The cell dimensions are a=10.196(7)Å, b=10.814(7)Å, c=10.017(7)Å, Z=2 and V=1117.4(12). IR spectral studies reveal the nonadentate behavior of the ligand. All the complexes are neutral in nature and possess six-coordinate geometry around each metal center. The X-band EPR spectra of copper(II) complex at both room temperature and liquid nitrogen temperature showed unresolved broad signals with g(iso)=2.106. Cyclic voltametric studies of copper(II) complex at different scan rates reveal that all the reaction occurring are irreversible.
authors.affiliation: Department of Chemistry, Karnatak University, Dharwad 580 003, India.
authors.forename: Ramesh S
authors.initials: RS
authors.lastname: Vadavi
authors.forename: Rashmi V
authors.initials: RV
authors.lastname: Shenoy
authors.forename: Dayananda S
authors.initials: DS
authors.lastname: Badiger
authors.forename: Kalagouda B
authors.initials: KB
authors.lastname: Gudasi
authors.forename: L Gomathi
authors.initials: LG
authors.lastname: Devi
authors.forename: Munirathinam
authors.initials: M
authors.lastname: Nethaji
mesh_terms: D056831:Coordination Complexes / Q000737:chemistry*; D018360:Crystallography, X-Ray; D004563:Electrochemistry; D006834:Hydrazines / Q000737:chemistry*; D008024:Ligands; D008958:Models, Molecular; D010848:Picolinic Acids / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry*; D013057:Spectrum Analysis; D013696:Temperature; D028561:Transition Elements / Q000737:chemistry*
chemical_list: D056831:Coordination Complexes; D006834:Hydrazines; D008024:Ligands; D010848:Picolinic Acids; D011725:Pyridines; D028561:Transition Elements; C004860:dipicolinic acid