Synthesis and characterization of Fe(III), Co(II), Ni(II), Cu(II) and Zn(II) complexes with N-salicydene-o-hydroxymethyleneaniline
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2019, Journal of Molecular StructureCitation Excerpt :The ESR spectra of Cu(II) complex 1 exhibited one broad band with geff = 2.09, proposing square planar geometry around Cu(II) ion in the complex such as concluded from its UV/Vis spectra [29]. Whereas, oxovanadium(IV) complex 4, displayed one band at geff = 2.09 indicating an octahedral geometry around VO(IV) ion corroborative with the results obtained from its IR and UV/Vis spectra [66]. The mass spectra of complexes 2, 3 and 4 as representative complexes (Figs. 5–7), Complexes 2, 3 and 4 provide good evidence for the molecular formulas from their highest mass peak at m/z 611, 461 and 664 respectively, which agree well with the proposed formula weights for the non-hydrated or non-solvated complexes: [Ni(L)2].2H2O (F. Wt = 647.33), [CoL(H2O)3]NO3.1.5CH3OH (F. Wt = 499.34), [VO(L)2].3H2O (F. Wt = 673.5).
Synthesis, characterization and anti-bacterial activity of divalent transition metal complexes of hydrazine and trimesic acid
2018, Journal of Saudi Chemical SocietySynthesis, spectroscopic characterization, antimicrobial and antitumor studies of mono-, bi- and tri-nuclear metal complexes of a new Schiff base ligand derived from o-acetoacetylphenol
2017, Journal of Molecular StructureCitation Excerpt :Inspection of the data in Table 5 advocate, the following remarks: The negative values of ΔS* indicate that the activated complex is more ordered than the reactants and/or the reactions are slow [58]. This interpretation emphasized by the negative slope of the linear relationship of Egap versus ΔS*, Egap/eV = −6.43–0.058 ΔS*, r = 0.97, n = 5 all TGA points included.
Syntheses, structures, and magnetic properties of cubane-based cobalt and nickel complexes with ONO-tridentate ligands
2017, PolyhedronCitation Excerpt :Acetonitrile was dehydrated with P2O5 and distilled before using. The ligand H2L1-H [7], H2L1-Bz [8], and H2L2-H [13] were obtained by the literature methods. Elemental analyses for C, H and N were obtained at the Elemental Analysis Service Center, Kyushu University.