Effect of methyl substituent in pyridine on the spectral and thermal properties of pyridyl adducts of Zn(II) and Cd(II) dithiocarbamate
Date
2013Author
Onwudiwe, Damian C.
Strydom, Christien A.
Hosten, Eric C.
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Show full item recordAbstract
Four novel pyridine and 2-methyl pyridine adducts of Zn(II) and Cd(II) N-methyl-N-phenyl dithiocarbamates,
[Zn(mpdtc)2py], [Zn(mpdtc)2mpy], [Cd(mpdtc)2py2], and [Cd(mpdtc)2mpy] (mpdtc = N-methyl-Nphenyl
dithiocarbamates, py = pyridine, mpy = 2-methyl pyridine) have been synthesized. The compounds
were characterized by elemental analysis, NMR (1H and 13C) and FTIR spectral techniques. The
cadmium compounds were further analyzed by the single crystal X-ray technique. Single-crystal X-ray
structural analysis of [Cd(mpdtc)2mpy] showed that cadmium is five-coordinate with four sulphurs from
dithiocarbamate and one nitrogen from pyridine, while [Cd(mpdtc)2py2] displayed a six-coordinate
geometry with two molecules of nitrogen. The thermal decomposition characteristics (TG/DTG/DSC) of
the complexes in the interval 20 to 650 C were also studied. The spectral and thermal analyses show
the influence of the positive inductive effect of the methyl group on the dithiocarbamate. The morphology
and composition of the thermal residues were studied using powder XRD and SEM/EDX analyses.
URI
http://hdl.handle.net/10394/13997https://doi.org/10.1016/j.ica.2013.03.010
https://www.sciencedirect.com/science/article/pii/S0020169313001436