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Spectroscopic and Thermal Studies of Palladium (II) Complex of N-(5-methylpyridin-2-ylcarbamothiol) Cinnamamide Ligand

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Author Affiliations

  • 1 Department of Chemical Sciences, Faculty of Science and Technology, Universiti Malaysia Terengganu, 21030, Kuala Terengganu, MALAYSIA
  • 2 Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, 81310, JohorBahru, Johor, MALAYSIA

Res. J. Recent Sci., Volume 2, Issue (11), Pages 12-19, November,2 (2013)

Abstract

N-(5-methylpyridin-2-ylcarbamothiol) cinnamamide ligand (L1) and dichloro (N-(5-methylpyridine-2-yl-carbamothiol) cinnamamide – K2 O,S) palladium (II) (ML1) were successfully synthesised and characterized by several typical spectroscopic and analytical techniques namely Infra-Red (IR) Spectroscopy, 1H and 13C Nuclear Magnetic Resonance and Thermogravimetric Analysis (TGA). The Infrared spectrum for L1 shows four bands of interest namely v(N-H), v(C=O), v(C-N), v(C=N) and v(C=S) which can be observed at 3247cm-1, 1682cm-1, 1473cm-1, 1541cm-1 and 764cm-1 respectively while for the designated metal complex, ML1 the values fall at 3227cm-1, 1689cm-1, 1492cm-1, 1542cm-1 and 774cm-1 respectively. In 1H NMR spectra for the compound L1 and ML1 show protons for N-H which can be observed at δH 10.11ppm, 13.02ppm and δH 8.71ppm, 8.99ppm while the 13C NMR spectra for these compounds, the signal of C=O and C=S can be observed at δC 177ppm, 164ppm and δC 173ppm,166ppm. Whilst, in thermogravimetric analysis, compounds L1 and ML1 started to degrade at temperature 162.14°C (80% weight of sample) and 186.15°C (74 % weight of sample) respectively.

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