Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Thermodynamic study on complex of neodymium with glycine

Zhang, D.-S.[Da-Shun], Tan, Z.-C.[Zhi-Cheng], Liu, B.-P.[Bei-Ping], Huang, X.-B.[Xiao-Bing]
J. Chem. Thermodyn. 2015, 83, 27-32
ABSTRACT
Neodymium complex with glycine, Nd(Gly)2Cl3 3H2O, was synthesized and characterized by IR spectra. The thermal stability of the complex was tested through TG and DTG and a possible mechanism of thermal decomposition was proposed. The heat capacities of the complex were measured by using an automated adiabatic calorimeter over the temperature range from T = (80 to 380) K, the thermodynamic functions, [HT H298.15] and [ST S298.15], were calculated based on the heat capacity measurements. Two (solid + solid) phase transitions in the ranges of T = (170 to 247) K were observed with the peak temperatures of 184.896 K and 231.217, respectively. The standard molar enthalpy of formation of [Nd(Gly)2Cl3 3H2O] was determined to be ( 3081.3 +- 1.1) kJ mol 1 in terms of an isoperibol solutionreaction calorimeter.
Compounds
# Formula Name
1 C2H5NO2 2-aminoacetic acid
2 Cl3H12NdO6 neodymium trichloride hexahydrate
3 H2O water
4 Nd neodymium
5 Cl2 chlorine
6 H2 hydrogen
7 N2 nitrogen
8 C graphite
9 O2 oxygen
10 C4H16Cl3N2NdO7 triaquadiglycinatoneodymium trichloride (Nd(Gly)2Cl3.3H2O)
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
  • Triple point temperature, K ; Crystal 3
  • Crystal 3
  • Crystal 2
  • Gas
  • Adiabatic calorimetry
  • 1
  • POMD
  • 10
  • Triple point temperature, K ; Crystal 2
  • Crystal 2
  • Crystal 1
  • Gas
  • Adiabatic calorimetry
  • 1
  • POMD
  • 10
  • Molar enthalpy of transition or fusion, kJ/mol ; Crystal 3
  • Crystal 3
  • Crystal 2
  • Gas
  • Adiabatic calorimetry
  • 1
  • POMD
  • 10
  • Molar enthalpy of transition or fusion, kJ/mol ; Crystal 2
  • Crystal 2
  • Crystal 1
  • Gas
  • Adiabatic calorimetry
  • 1
  • POMD
  • 10
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal 3
  • Temperature, K; Crystal 3
  • Pressure, kPa; Crystal 3
  • Crystal 3
  • Vacuum adiabatic calorimetry
  • 33
  • POMD
  • 10
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal 2
  • Temperature, K; Crystal 2
  • Pressure, kPa; Crystal 2
  • Crystal 2
  • Vacuum adiabatic calorimetry
  • 15
  • POMD
  • 10
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal 1
  • Temperature, K; Crystal 1
  • Pressure, kPa; Crystal 1
  • Crystal 1
  • Vacuum adiabatic calorimetry
  • 33
  • POMD
  • 10
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal 3
  • Temperature, K; Crystal 3
  • Pressure, kPa; Crystal 3
  • Crystal 3
  • Vacuum adiabatic calorimetry
  • 12
  • POMD
  • 10
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal 2
  • Temperature, K; Crystal 2
  • Pressure, kPa; Crystal 2
  • Crystal 2
  • Vacuum adiabatic calorimetry
  • 7
  • POMD
  • 10
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal 1
  • Temperature, K; Crystal 1
  • Pressure, kPa; Crystal 1
  • Crystal 1
  • Vacuum adiabatic calorimetry
  • 11
  • RXND
  • 1
  • 2
  • 10
  • 3
  • Molar enthalpy of reaction, kJ/mol
  • Solution calorimetry
  • 1
  • RXND
  • 4
  • 5
  • 10
  • 6
  • 7
  • 8
  • 9
  • Molar enthalpy of reaction, kJ/mol
  • Solution calorimetry
  • 1