Maheswaran, Sithambaresan; Dr.Prathapachandra Kurup,M R(Cochin University of Science and Technology, April , 2012)
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Abstract:
The unusual coordination modes of semicarbazones when bound to
metals, the wide applications and structural diversity of metal complexes of
semicarbazones provoked us to synthesize and characterize the tridentate ONO
and NNO-donor semicarbazones and their transition metal complexes. This
work is focused on the studies on complexes of three N4-phenylsemicarbazones
synthesized by changing the carbonyl compounds. This work is concerned with the studies of two new semicarbazones, 2- formylpyridine-N4-phenylsemicarbazone (HL1) and 3-ethoxysalicylaldehyde- N4-phenylsemicarbazone (H2L2) and a reported semicarbazone
2-benzoylpyridine-N4-phenylsemicarbazone (HL3) [29]. The compositions of
these semicarbazones were determined by the CHN analyses and IR, UV and
NMR spectral studies were used for the characterization of these compounds.
The molecular structure of 3-ethoxysalicylaldehyde-N4-phenylsemicarbazone
(H2L2) was obtained by single crystal X-ray diffraction studies. Also, we have
synthesized Cu(II), Cd(II), Zn(II) and Ni(II) complexes of these three
semicarbazones. The complexes were characterized by various spectroscopic
techniques, magnetic and conductivity studies. We could isolate single crystals
of some complexes of all metals suitable for X-ray diffraction studies. This
thesis is divided into six chapters.
Description:
Department of Applied Chemistry, Cochin University of Science and Technology