- 作者: 宋紀蓉,馬海霞,黃潔,胡榮祖,康冰
- 作者服務機構: Department of Chemical Engineering/Shaanxi Key Laboratory of Physico-Inorganic Chemistry, Northwest University, Xi’an 710069, P. R. China
- 中文摘要: 3-Nitro-1,2,4-triazol-5-one (NTO) europium complex of [Eu(NTO)3(H2O)5]·5H2O was synthesized by mixing the aqueous solution of lithium 3-nitro-1,2,4-triazol-5-onate and the dilute nitric acid solution of europium oxide. The title complex was characterized by elemental analysis and IR spectra. The single crystal structure was determined by a four-circle x-ray diffractometer. The title complex is monoclinic with space group P21/n and unit cell parameters of a = 1.8720(2) nm, b = 0.6548(3) nm, c = 1.9323(3) nm and b = 95.33(1)°. The coordination geometry around the europium ion is a distorted dodecahedron and there are five crystalline water molecules to form the stable structure of the crystal. From measurements of the enthalpy of solution in water at 298.15 K, the standard enthalpy of formation, lattice enthalpy and lattice energy have been determined as -(3798.6 ± 3.7), -4488.4 and -4452.4 kJ·mol-1, respectively.
- 英文摘要: --
- 中文關鍵字: 3-Nitro-1,2,4-triazol-5-one (NTO); NTO europium complex; Preparation; Crystal structure; Thermodynamic properties.
- 英文關鍵字: --