ŠIBOR, Jiří a Pavel PAZDERA. Thermal Behaviour of Esters and Nitriles 2-(3-Acylselenoureido)benzoic and 2-(3-Acylselenoureido)thiophene-3-carboxylic Acids. Chem. Papers. Bratislava, Slovak Republic: Slovak Academy of Science, 2000, roč. 54, č. 1, s. 28-35. ISSN 0366-6352. |
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@article{248072, author = {Šibor, Jiří and Pazdera, Pavel}, article_location = {Bratislava, Slovak Republic}, article_number = {1}, keywords = {thermal behaviour of esters and nitriles;}, language = {eng}, issn = {0366-6352}, journal = {Chem. Papers}, title = {Thermal Behaviour of Esters and Nitriles 2-(3-Acylselenoureido)benzoic and 2-(3-Acylselenoureido)thiophene-3-carboxylic Acids}, volume = {54}, year = {2000} }
TY - JOUR ID - 248072 AU - Šibor, Jiří - Pazdera, Pavel PY - 2000 TI - Thermal Behaviour of Esters and Nitriles 2-(3-Acylselenoureido)benzoic and 2-(3-Acylselenoureido)thiophene-3-carboxylic Acids JF - Chem. Papers VL - 54 IS - 1 SP - 28 EP - 28 PB - Slovak Academy of Science SN - 03666352 KW - thermal behaviour of esters and nitriles; N2 - The thermally initiated transformation of esters and nitriles of 2-(3-acylselenoureido)benzoic and 2-(3-acylselenoureido)thiophene-3-carboxylic acids under heating without solvent to the temperature ca. 300 degrees C was studied. The thermal behaviour was studied by methods of the thermal analysis. It was found that selenoureas in ester series afford isoselenoureas at the temperature lower than their melting points. This change occurs in the solid state as an exothermic process. The next exothermic change starts by the following increase in temperature. Two molecules of isoselenoureas eliminate one hydrogen molecule by air oxygen action. The oxidation is connected with Se-Se bond formation and diselenides are formed. Nitriles undergo a transformation to di(2-pyrimidyl)diselenides in the course of several steps in melt in the presence of air oxygen. ER -
ŠIBOR, Jiří a Pavel PAZDERA. Thermal Behaviour of Esters and Nitriles 2-(3-Acylselenoureido)benzoic and 2-(3-Acylselenoureido)thiophene-3-carboxylic Acids. \textit{Chem. Papers}. Bratislava, Slovak Republic: Slovak Academy of Science, 2000, roč.~54, č.~1, s.~28-35. ISSN~0366-6352.
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