Spectroscopic and thermal studies of palladium (II) Complex of N-(5-methylpyridin-2-ylcarbamothiol) cinnamamide ligand

Abstract

N-(5-methylpyridin-2-ylcarbamothiol) cinnamamide ligand (L1) and dichloro (N-(5-methylpyridine-2-yl-carbamothiol)cinnamamide –к2O,S) palladium (II) (ML1) were successfully synthesised and characterized by several typicalspectroscopic and analytical techniques namely Infra-Red (IR) Spectroscopy,1H and13C Nuclear Magnetic Resonance andThermogravimetric Analysis (TGA). The Infrared spectrum for L1 shows four bands of interest namelyν(N-H),ν(C=O),ν(C-N),ν(C=N) andν(C=S) which can be observed at 3247cm-1, 1682cm-1, 1473cm-1, 1541cm-1and 764cm-1respectivelywhile for the designated metal complex, ML1 the values fall at 3227cm-1, 1689cm-1, 1492cm-1, 1542cm-1and 774cm-1respectively. In1H NMR spectra for the compound L1 and ML1 show protons for N-H which can be observed atδH10.11ppm, 13.02ppm andδH8.71ppm, 8.99ppm while the13C NMR spectra for these compounds, the signal of C=O and C=Scan be observed atδC177ppm, 164ppm andδC173ppm,166ppm. Whilst, in thermogravimetric analysis, compounds L1 andML1 started to degrade at temperature 162.14°C (80%weight of sample) and 186.15°C (74 % weight of sample)respectively.