氯化镝与甘氨酸配位反应的热化学研究

Thermochemical Study of the Reaction of Dysprosium Chloride Coordinated with Glycine

用新型的具恒温环境的反应热量计 ,以 2 mol/L HCl为量热溶剂 ,分别测定了 Dy Cl3·6H2 O (s) +3Gly(s) (Gly代表甘氨酸 )和配合物 Dy(Gly) 3Cl3· 3H2 O(s)在 2 mol/L HCl溶液中的溶解焓变。根据盖斯定律设计了一个热化学循环 ,计算得到六水氯化镝与甘氨酸配位反应的反应焓Δr Hθm(2 98.2 K) =- 2 6.2 89k J/mol,并估算出配合物 Dy(Gly) 3Cl3· 3H2 O的标准生成焓 Δr Hθm(2 98.2 K) =- 3650 .5k J/mol。

The reaction enthalpy of corrdination reaction of dysprosium chloride with glycine was determined by solution calorimetry in an isoperibel reaction calorimeter. The calormaetric solvent was a solution of hydrochloric acid (2mol/L), a new thermochemical cycle was designed. According to the results, the following resultsΔ_rH θ_m(298.2 K)=-26.289 kJ/mol;Δ_fH θ_m[Dy(Gly)_3Cl_3·3H_2O(s),298.2 K]=-3650.5 kJ/molwere obtained.