Thermodynamics Research Center / ThermoML | Thermochimica Acta

Adducts of antimony tri-iodide and aromatic amines: A calorimetric study

Nobrega, A. S.[Antonio S.], Espinola, J. G. P.[Jose G. P.], Fonseca, M. G.[Maria G.], Arakaki, L. N. H.[Luiza N. H.], de Oliveira, S. F.[Severino F.]
Thermochim. Acta 2007, 456, 2, 102-105
ABSTRACT
Solid adducts of formula SbI3.L (L = pyridine and 2-, 3-, 4-methylpyridine abbreviated as Py, 2MPy, 3MPy and 4MPy) were synthesized and characterized by elemental analysis, IR spectroscopy and thermal analysis. The results obtained from infrared spectroscopy suggest that the coordination of ligands with antimony through nitrogen of the aromatic ring. Thermal degradation of adducts starts at 431, 423, 413, 411 K for SbI3.L (L = pyridine and 2-, 3-, 4- methylpyridine). Reaction-solution calorimetry was used to evaluate the thermochemical parameters. The values for enthalpy of reaction: SbI3(cr) + L(l) = SbI3*L(cr) ArHm e(solid) were 61.13 +- 1.75 82.60 +- 1.55, 67.50 +- 0.97 and 74.10 +- 1.19kJmol-1, respectively, The standard enthalpies value of the decomposition of adducts, as well as the lattice standard enthalpies and the standard enthalpies of the Lewis acid-base reaction in the gaseous phase were calculated through adequate thermo-chemical cycles. The standard mean Sb-N bond enthalpies were estimated as 134.18 +- 3.40; 154.68 +- 3.54; 140.57 +- 3.15 and 147.61 +- 4.26 kJ mol-1, for pyridine, 2-, 3-, and 4-methylpyridine adducts, respectively.
Compounds
# Formula Name
1 C5H5N pyridine
2 I3Sb antimony iodide (SbI3)
3 C6H7N 2-methylpyridine
4 C6H7N 3-methylpyridine
5 C6H7N 4-methylpyridine
6 C5H5I3NSb triiodoantimony pyridine compound
7 C6H7I3NSb triiodoantimony 2-methylpyridine compound
8 C6H7I3NSb triiodoantimony 3-methylpyridine compound
9 C6H7I3NSb triiodo(4-methylpyridine)antimony
10 C4H10O2 2-ethoxyethan-1-ol
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 10
  • 2
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Mole fraction - 2; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • ISOPERIBOL
  • 1
  • POMD
  • 10
  • 1
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Mole fraction - 1; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • ISOPERIBOL
  • 1
  • POMD
  • 3
  • 10
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Mole fraction - 3; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • ISOPERIBOL
  • 1
  • POMD
  • 4
  • 10
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Mole fraction - 4; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • ISOPERIBOL
  • 1
  • POMD
  • 5
  • 10
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Mole fraction - 5; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • ISOPERIBOL
  • 1
  • RXND
  • 1
  • 2
  • 6
  • Molar enthalpy of reaction, kJ/mol
  • Solution calorimetry
  • 1
  • RXND
  • 3
  • 2
  • 7
  • Molar enthalpy of reaction, kJ/mol
  • Solution calorimetry
  • 1
  • RXND
  • 4
  • 2
  • 8
  • Molar enthalpy of reaction, kJ/mol
  • Solution calorimetry
  • 1
  • RXND
  • 5
  • 2
  • 9
  • Molar enthalpy of reaction, kJ/mol
  • Solution calorimetry
  • 1