Thermodynamics of tetraphenylantimony acetophenoneoxymate |
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| Authors: | I. A. Letyanina N. N. Smirnova A. V. Markin V. A. Ruchenin V. N. Larina V. V. Sharutin O. V. Molokova |
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| Affiliation: | (1) Research Institute of Chemistry of Nizhny Novgorod State University, Russian Federation, Prospekt Gagarina, 23/5, Nizhny Novgorod, Russia, 603950;(2) Blagoveschensk State Pedagogical University, Russian Federation, ulitsa Lenina, 104, Blagoveschensk, Russia, 675000;(3) Far Eastern Military Institute, Russian Federation, ulitsa Lenina, 158, Blagoveschensk, Russia, 675021; |
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| Abstract: | In the present research for the first time, the heat capacity Ctextp ° C_{text{p}}^{ circ } of crystalline tetraphenylantimony acetophenoneoxymate Ph4SbONCPhMe has been measured using the methods of precision adiabatic vacuum calorimetry over the range from 6 to 350 K, the standard thermodynamic functions: heat capacity Ctextp ° (T ) C_{text{p}}^{ circ } (T ) , enthalpy H°(T) − H°(0), entropy S°(T), and Gibbs function G°(T) − H°(0) have been calculated over the range from T → 0 K to 350 K. Low-temperature (20 K ≤ T ≤ 50 K) heat capacity data have shown a chain-layered structure topology of the compound under study. The energy of combustion of the compound has been determined in the isothermal combustion calorimeter with a stationary bomb. The standard thermodynamic functions of formation of crystalline Ph4SbONCPhMe at 298.15 K have been calculated. The differential scanning calorimetry and thermogravimetric analysis studies have shown the compound melts with decomposition and its melting temperature has been estimated. Thermodynamic properties of Ph4SbONCPhMe, Ph5Sb and Ph4SbONCPh2 have been compared. |
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