Spectral,magnetic and thermal studies on homometallic and heterometallic complexes of piperanol thiosemicarbazone |
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| Authors: | Ahmed A El-Asmy Sherif A Mandour |
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| Institution: | 1.Chemistry Department, Faculty of Science,Mansoura University,Mansoura,Egypt |
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| Abstract: | Piperanol thiosemicarbazone (HL) has been interacted with Ag+, Co(II), Ni(II) or Cu(II) binary to produce Ag(HL)]EtOH · NO3, Ag2(L)(H2O)2]NO3, Co(L)3], Cu(L)(H2O)3(OAc)]H2O or Ni(L)2] and template with Ag+ to form Cu2Ag2(L)2(OH)2(H2O)4]NO3 and NiAg(L)2(H2O)2]NO3. The prepared complexes are characterized by microanalysis, thermal, magnetic and spectral (IR, 1H NMR, ESR and electronic) studies. Ag+ plays an important role in the complex formation. The variation in coordination may be due to the presence of two different
metal ions and the preparation conditions. The outside nitrate is investigated by IR spectra. The outer sphere solvents are
detected by IR and thermal analysis. Ni(II) complexes are found diamagnetic having a square-planar geometry. Cu(II) is reduced
by the ligand to Cu(I). The cobalt complex is found diamagnetic confirming an air oxidation of Co(II) to Co(III) having a
low spin octahedral geometry. The ligand and its metal complexes are found reducing agents which decolorized KMnO4 solution in 2N H2SO4. CoNS and NiNS are the residual parts in the thermal decomposition of Co(L)3] and Ni(L)2]. |
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