Coordination Behavior Of New Bis

1613 Words Sep 16th, 2016 7 Pages
Coordination behaviour of new bis(tridentate ONO, ONS and ONN) donor hydrazones towards some transition metal ions: Synthesis, spectral, thermal, antimicrobial and antitumor studies

Magdy Shebl *
Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, Cairo, Egypt

* e-mail address:
Tel: +20 233120546.

Three new hydrazone ligands, H2L1, H2L2 and H4L3, were prepared by condensation of 4,6-bis(1-hydrazonoethyl)benzene-1,3-diol with furan-2-carboxaldehyde, thiophene-2-carboxaldehyde and 1H-pyrrole-2-carboxaldehyde, respectively. The ligands reacted with copper(II), nickel(II), cobalt(II), zinc(II), cadmium(II) and dioxouranium(VI) ions, to yield binuclear complexes formulated as [(L)M2(OAc)2(H2O)n(EtOH)m]•xH2O•yEtOH where L = L1 or L2; M = Cu, Ni, Co, Zn or Cd; n = nil, 1 or 4; m, x and y = nil or 1, [(H2L2)Cd2(OAc)4(H2O)2]•EtOH, [(L)(UO2)2(OAc)2(H2O)2Y2]•nH2O where L = L1 or L2; Y = nil or H2O; n = 2.5 or 7, [(L3)M2(H2O)6]•nH2O where M = Cu or Zn; n = 1 or 6, [(L3)(UO2)2(H2O)4]•2.5H2O and dimeric complexes; [(L1)2Ni2]•3H2O and [(H2L3)2M2]•nH2O where M = Ni or Co; n = 1.5 or 3. The ligands and their metal complexes were characterized by elemental analyses, IR, 1H and 13C NMR, electronic, ESR and mass spectra, conductivity, magnetic susceptibility measurements and powder XRD as well as thermal analyses. The coordinating sites are phenolic oxygens, azomethine nitrogens and the hetero O/N/S atoms. Octahedral, tetrahedral and…
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