The molar dissolution enthalpy of the reactants and the products of the coordination reaction of Samarium Chloride with Glycine have been measured by isoperibol solution calorimetry, the calorimetric solvent is 2mol. L-l HCI solution. The standard molar reaction enthalpy (298. 2K) is -7. 3381kJ· mol - 1. From the results and other auxiliary quantities, the standard molar enthalpy of formation of the new coordination compound has been calculated to be (Sm(Cly)3C13. 3H2O, s, 298. ZK) = - 3631. 74kJ · mol- 1.
The reaction enthalpy of solid-solid coordination reaction of L-Leucine with copper acetate is determined by solution calorimetry in an isoperibel reaction calorimeter. The calorimetric solvent is the solution of hydrochloric acid（4 mol/L）, a new thermochemical cycle is designed. The values of ΔfHθm=15.64 kJ/mol, ΔfHθm（trans-Cu（L-Leu）2,s）=-1194.7 kJ/mol are evalcated.
The molar dissolution enthalpy of the reactants and the products of the coordination reaction of erbium nitrate with alanine hava been measured by classical solution calorimetry,the calorimetric solvent is 2mol· L－ 1 HCl solution.The standard molar reaction enthalpy of this coordination has been determined by a new chemical circle ,and =17.800kJ· mol－ 1.From the results and other auxiliary quantities ,the standard molar enthalpy of formation of the new complex Er(Ala)4(NO3)3· H2O has been calculated to be [Er(Ala)4(NO3)3· H2O,s, 298.2K]= － 3818.2kJ· mol－ 1.
