Heat Capacity and Standard Thermodynamic Functions of Triphenylantimony Dimethacrylate over the Temperature Range from (0 to 400) K

Abstract

Heat capacities of triphenylantimony dimethacrylate Ph3Sb(O2CCMeCH2)2 were measured by precision adiabatic vacuum calorimetry over the temperature range from T = (6 to 335) K and by differential scanning calorimetry over the temperature range from T = (300 to 470) K. The melting of the sample was observed within the above temperature range. The melting was accompanied by a compound decomposition. On the obtained data, the standard thermodynamic functions of molar heat capacity C p,m o, enthalpy H o(T) – H o(0), entropy S o(T), and Gibbs energy G o(T) – H o(0) of Ph3Sb(O2CCMeCH2)2 were calculated over the range from T = (0 to 400) K. The low-temperature (T < 50 K) heat capacity dependence was analyzed on the basis of Debye's heat capacity theory of solids and its multifractal model, so the characteristic temperatures and the fractal dimension were determined, and some conclusions about the structure topology were made. The standard entropy of formation at T = 298.15 K of Ph3Sb(O2CCMeCH2)2(cr) was calculated.

Thermodynamic characteristics of triphenylantimony diacrylate

“…According to the thermogravimet ric analysis data, the thermal destruction of the com pound starts at 430 K, which can explain the behavior of the dependence of on Т (D'E region). This behavior is also characteristic for the organic deriva tives of pentavalent antimony that we studied earlier Ph 5 Sb [5], Ph 4 SbONCPh 2 [6], Ph 4 SbONCPhMe [7], and Ph 3 Sb(O 2 CCMe=CH 2 ) 2 [9].…”

“…Figure 3 shows a fragment of a one dimensional chain of Ph 3 Sb(O 2 CCH=CH 2 ) 2 molecules observed in crys tals. The organic derivatives of pentavalent antimony studied earlier [5][6][7][8][9] also have a chain layered struc ture topology.…”

“…The thermodynamic charac teristics of the organic derivatives of pentavalent anti mony were not sufficiently studied [4]. We examined the standard thermodynamic properties of pentaphe nylantimony Ph 5 Sb [5], tetraphenylantimony ben zophenone oximate Ph 4 SbONCPh 2 [6], tetrapheny lantimony acetophenone oximate Ph 4 SbONCPhMe [7], triphenylantimony bis(acetophenone oximate) Ph 3 Sb(ONCPhMe) 2 [8], and triphenylantimony dimethacrylate Ph 3 Sb(O 2 CCMe=CH 2 ) 2 [9], at tem peratures from 0 to 350-450 K.…”

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

“…Previously, we reported the thermodynamic properties of pentaphenylantimony Ph 5 Sb [11], tetraphenylantimony benzophenoneoxymate Ph 4 SbONCPh 2 [12], tetraphenylantimony acetophenoneoxymate Ph 4 SbONCPhMe [13], triphenylantimony diacrylate Ph 3 Sb(O 2 CCH=CH 2 ) 2 [14], triphenylantimony dimethacrylate Ph 3 Sb(O 2 CCMe=CH 2 ) 2 [15], triphenylantimony bis(acetophenoneoxymate) Ph 3 Sb(ONCPhMe) 2 [16,17], and triphenylantimony bis(1-adamantanecarboxylate) Ph 3 Sb[OC(O)C 10 H 15 ] 2 [18]. The present article continues our studies in the same line and reports the calorimetric study of the temperature dependence of the heat capacity of triphenylantimony and triphenylbismuth dicrotonates from 6.5 to 490 K including the detection of possible physical transitions, the calculation of the standard thermodynamic functions, namely C o p , H°(T)-H°(0), S°(T), and G°(T)-H°(0) from T ?…”

Synthesis and structure of triphenylbismuth bis(3-phenylprop-2-enoate)

“…Data on the use of bismuth compounds in the design of radiation-damage-resistant polymer glasses required for scintillator-based detectors for highenergy particles were published in the literature [5,6]. It was shown that crystals of monomeric triphenylantimony dimethacrylate can undergo a secondorder phase transition in the low-temperature region 150−170 K [7]. Earlier, a derivative of triphenylantimony with 3-phenylprop-2-enoic acid Ph 3 Sb(O 2 CCН=CHPh) 2 has been synthesized by the reaction of triphenylantimony dihalide with sodium cinnamate.…”