Characterization, kinetics of thermal decomposition and molecular modeling studies on mercury (II) complexes of biologically active glutathione

Cobalt(II) complexes of new biomimetic polydentate amide: spectroscopic, kinetics of thermal decomposition and XRPD studies

Complexes of Co(II) with new ligands N',N''-bis(3-carboxy-1-oxoprop-2-enyl) 2-amino-N-arylbenzamidine (C(21)H(17)N(3)O(6)), N',N''-bis(3-carboxy-1-oxopropanyl) 2-amino-N-arylbenzamidine (C(21)H(21)N(3)O(6)) and N',N''-bis(3-carboxy-1-oxophenelenyl) 2-amino-N-arylbenzamidine (C(29)H(21)N(3)O(6)) have been synthesized and characterized by elemental analyses, vibrational spectra, electronic spectra, TOF-mass spectra, magnetic susceptibility measurements, thermal studies and X-ray powder diffraction studies. Vibrational spectra indicate coordination of amide and carboxylate oxygen of the ligands along with two water molecules giving a MO(6) weak field octahedral chromophore. Electronic spectra and magnetic susceptibility measurements reveal octahedral geometry for Co(II) complexes. The elemental analyses and mass spectral data have justified the ML complexes. Kinetic and thermodynamic parameters were computed from the thermal data using Coats and Redfern method, which confirm first-order kinetics. Powder diffraction determines the cell parameters of the complexes.

Synthesis and spectrothermal studies on group 12 metals coordination with novel carboxyamide ligands

Complexes of group 12 metals with new ligands N',N''-bis(3-carboxy-1-oxopropanyl) 2-amino-N-arylbenzamidine (H2L) and N',N''-bis(3-carboxy-1-oxophenelenyl) 2-amino-N-arylbenzamidine (H(2)L) have been synthesized and characterized by elemental analyses, vibrational spectra, electronic spectra, (1)H NMR spectra, TOF-mass spectra, thermal studies and molecular modeling studies. The infrared and (1)H NMR spectral data are in agreement with coordination of amide and carboxylate oxygen of the ligands giving a MO(4) tetrahedral chromophore. The elemental analyses and mass spectral data have justified the ML complexes. The thermal behaviour of complexes shows that water molecule is removed in first step--followed by decomposition of the rest of the molecule in the next steps. Kinetic and thermodynamic parameters were computed from the thermal data using Coats and Redfern method, which confirm first order kinetics. Molecular structures of the complexes have been optimized by MM2 calculations and supported tetrahedral geometry around metal(II) ions.