W. Xiao, Zhong-lin Lu, C. Su
Oct 10, 2000
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0
Influential Citations
24
Citations
Journal
Journal of Molecular Structure
Abstract
Abstract A new ligand 4,5-diazafluorene-9-one benzoylhydrazone (HL) and six of its transition metal complexes ML2·nH2O [ M(II) = Mn, n=2, 1; Co, 2, 2; Ni, 2, 3; Cu, 3, 4; Zn, 1.5, 5; Pb, 4, 6] have been prepared and characterized. Elemental analyses, IR, UV–Vis, 1H NMR, molar conductivity and thermal analyses measurements showed that the ligand coordinates to the metal ion with the enolic O and azomethine N atoms of the acylhydrazone group while the 4,5-diazafluorene moiety is free. Single crystal X-ray diffraction studies showed that CoL2(H2O)2, 2, has a centrosymmetric octahedral geometry of N2O4 with the two bidentate ligands in the basal plane and the two water molecules in the axial sites. The molecules of 2 are linked together by intermolecular hydrogen bonds Ndiazafluorene⋯HOH⋯N′diazafluorene and π–π stacking interactions between the diazafluorene rings to form 2D sheets.