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以五水硫酸铜、甘氨酰甘氨酸(Gly-Gly)、咪唑(Im)为原料,制备了甘氨酰甘氨酸咪唑铜配合物,通过X射线单晶衍射测定了配合物的结构。该晶体属单斜晶系,P21/n空间群,a=1.0213(6)nm,b=0.7023(4)nm,c=1.5911(9)nm,β=102.393(9)°,V=1.1147(11)nm3,Z=4。用溶解量热法分别测定了CuSO4·5H2O(s)+Gly-Gly(s)+Na2SO4(s)、Im(s)和[Cu(Gly-Gly)(Im)]·2H2O(s)、NaHSO4·H2O(s)在2mol/LHCl中的溶解焓。根据Hess定律设计了一个热化学循环,计算得到CuSO4·5H2O(s)+Gly-Gly(s)+Im(s)+Na2SO4(s)=[Cu(Gly-Gly)(Im)]·2H2O(s)+2NaHSO4·H2O(s)+H2O(l)的反应焓△rHθm(298.15K)=(36.7634±1.1325)kJ/mol,进而求出[Cu(Gly-Gly)(Im)]·2H2O(s)的标准生成焓△fHθm{[Cu(Gly-Gly)(Im)]·2H2O(s),298.15K}=(-1770.3±1.4)kJ/mol。
The glycidyl glycinate imidazole copper complex was prepared from copper sulfate pentahydrate, glycylglycine (Gly-Gly) and imidazole (Im). The structure of the complex was determined by X-ray single crystal diffraction. The crystal belongs to the monoclinic space group P21 / n with a = 1.0213 (6) nm, b = 0.7023 (4) nm, c = 1.5911 (9) nm, β = 102.393 11) nm3, Z = 4. The solubility of CuSO4 · 5H2O (s) + Gly-Gly (s) + Na2SO4 (s), Im (s) and [Cu (Gly-Gly) H2O (s) Dissolved enthalpy in 2 mol / LHCl. According to Hess’s law, a thermochemical cycle was designed and calculated as CuSO4 · 5H2O (s) + Gly-Gly (s) + Im (s) + Na2SO4 (s) = [Cu (Gly-Gly) (Im) The reaction enthalpy Δ rHθm (298.15K) = (36.7634 ± 1.1325) kJ / mol + s of the reaction product of 2NaHSO4 · H2O (s) + H2O standard enthalpy of formation ΔfHθm {[Cu (Gly-Gly) (Im)] · 2H2O (s), 298.15K} = (- 1770.3 ± 1.4) kJ / mol.