Calorimetric study of organic compounds of antimony and bismuth Ph3Sb(O2CCH=CHCH3)2 and Ph3Bi(O2CCH=CHCH3)2

Abstract

In the present research, the temperature dependences of heat capacity of triphenylantimony dicrotonate Ph 3 Sb(O 2 CCH=CHCH 3 ) 2 and triphenylbismuth dicrotonate Ph 3 Bi(O 2 CCH=CHCH 3 ) 2 were studied by means of precision adiabatic vacuum calorimetry and differential scanning calorimetry over the temperature range from 6.5 to 490 K. The thermal stability of the samples was investigated by thermogravimetric analysis. The experimental data were used to calculate the standard thermodynamic functions: heat capacity, enthalpy, entropy, and Gibbs energy over the range from T ? 0 to 400-420 K. For the compounds under study, the standard entropy of formation was calculated at T = 298.15 K.

Tert-butyl-diphenylmethylnitroxyl radical formation with the reaction of triphenylbismuth dicrotonate and C-phenyl-N-tert-butylnitrone in benzene

“…Термостабильность этого соединения исследовалась с помощью термогравиметрического анализа. Экс-периментальные данные были исполь-зованы для расчета стандартных термо-динамических функций: теплоемкости, энтальпии, энтропии и энергии Гиббса в диапазоне от T = 0 до 400-420 K. Для изучаемых соединений стандартная эн-тропия образования рассчитывалась при T = 298,15 K [9].…”

“…The thermal stability of this compound was investigated by thermogravimetric analysis. The experimental data were used to calculate the standard thermodynamic functions: heat capacity, enthalpy, entropy and Gibbs energy over the range from T = 0 to 400-420 K. For the compounds under study the standard entropy of formation was calculated at T = 298.15 K [9].…”