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Synthesis and spectral investigation of manganese(II), cadmium(II) and oxovanadium(IV) complexes with 2,6-diacetylpyridine bis(2-aminobenzoylhydrazone): Crystal structure of manganese(II) and cadmium(II) complexes |
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| Authors: | Kalagouda B Gudasi Siddappa A Patil Rashmi V Shenoy Sim Wan Annie Bligh |
| Institution: | a Department of Chemistry, Karnatak University, Pavate Nagar, Dharwad, Karnataka 580 003, India b Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560 012, India c Institute for Health Research and Policy, London Metropolitan University, London N7 8DB, UK |
| Abstract: | The chelating behavior of 2,6-diacetylpyridine bis(2-aminobenzoylhydrazone) (H2dapa) towards manganese(II), cadmium(II) and oxovanadium(IV) ions has been studied by elemental analyses, conductance measurements, magnetic properties and spectral (IR, 1H NMR, UV-Vis and EPR) studies. The IR spectral studies suggest the pentadentate nature of the ligand with pyridine nitrogen, two azomethine nitrogens and two carbonyl oxygen atoms as the ligating sites. Six coordinate structure for VO(H2dapa)]SO4 · H2O and seven coordinate structures for Mn(H2dapa)(Cl)(H2O)]Cl · 2H2O and Cd(H2dapa)Cl2] · H2O complexes have been proposed. Pentagonal bipyramidal geometry for Mn(H2dapa)(Cl)(H2O)]Cl · 2H2O and Cd(H2dapa)(Cl2)] · H2O complexes was confirmed by single crystal analysis. The X-band EPR spectra of the oxovanadium(IV) and manganese(II) complexes in the polycrystalline state at room (300 K) and also at liquid nitrogen temperature (77 K) were recorded and their salient features are reported. |
| Keywords: | 2 6-Diacetylpyridine bis(2-aminobenzoylhydrazone) Transition metal compounds Spectra X-ray structures |
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