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Abstract:
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Thiosemicarbazones have recently attracted considerable attention due to
their ability to form tridentate chelates with transition metal ions through either
two nitrogen and sulfur atoms, N–N–S or oxygen, nitrogen and sulfur atoms,
O–N–S. Considerable interest in thiosemicarbazones and their transition metal
complexes has also grown in the areas of biology and chemistry due to
biological activities such as antitumoral, fungicidal, bactericidal, antiviral and
nonlinear optical properties. They have been used for metal analyses, for
device applications related to telecommunications, optical computing, storage
and information processing.The versatile applications of metal complexes of thiosemicarbazones in various fields prompted us to synthesize the tridentate NNS-donor
thiosemicarbazones and their metal complexes. As a part of our studies on
transition metal complexes with these ligands, the researcher undertook the current work
with the following objectives.
1. To synthesize and physico-chemically characterize the following
thiosemicarbazone ligands:
a. Di-2-pyridyl ketone-N(4)-methyl thiosemicarbazone (HDpyMeTsc)
b. Di-2-pyridyl ketone-N(4)-ethyl thiosemicarbazone (HDpyETsc)
2. To synthesize oxovanadium(IV), manganese(II), nickel(II), copper(II),
zinc(II) and cadmium(II) complexes using the synthesized
thiosemicarbazones as principal ligands and some anionic coligands.
3. To study the coordination modes of the ligands in metal complexes by
using different physicochemical methods like partial elemental analysis,
thermogravimetry and by different spectroscopic techniques.
4. To establish the structure of compounds by single crystal XRD studies |