Thermal Analysis of Thione Compounds II the Thermal Behaviour of N-Ethyl-Thiourea, N,N’ Diethyl- Thiourea and N-β-Allyl Thiourea
1Institute of Analitical Chemistry, University of Messina Salita Sperone 31, C.P. 30 98166 S. Agata di Messina Italy
2Department of Chemistry, University ''La Sapienza'', Piazzale Aldo Moro 5,00185 Roma Italy
3Department of Inorganic Chemistry and Molecular Structure, University of Messina, Salite Sperone 31, 98166 S. Agata di Messina Italy
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ABSTRACT:The thermal behaviours of the compounds of the title have been investigated in dynamic O2 and N2 atmospheres by conventional Thermal Analysis methods and IR spectra of the residue on heating. N-Ethyl-Thiourea and N- β Allyl- Thiourea undergo complete pyrolysis in two steps but in single step N,N1- Diethyl-thiourea. The presence of thiocyanate has been identified in the solid residue on heating for endothermic isomerization reaction with in temperature range 200-220°C.
KEYWORDS:N- β Allyl- Thiourea; O2 and N2
