The single crystal of lead salt of 3-nitro- 1, 2, 4-triazol-5-one (NTO), [Pb(NTO)2.H20] was prepared and its structure was determined by a four-circle X-ray diffractometer. The crystal is monoclinic, its space group is P21/n with crystal parameters of a=0.7262(1) rim, b=1.2129(2)nm, c=1.2268(3)nm, [3=90.38(2)o, V=1.0806(2)nm3, Z=4, Dc=2.97gcm-3, p.=157.83cm-1, F(000)=888. The final R is 0.027. By using SCF-PM3-MO method we obtained optimized geometry for [Pb(NTO)2.H20] and particularly positions for hydrogen atoms. Through the analyses of MO levels and bond orders it is found that Pb atom bond to ligands mainly with its 6p, and 6py AOs. The thermal decomposition experiments are elucidated when [Pb(NTO)z.H20] is heated, ligand water is dissociated first and NO2 group has priority of leaving. Based on the thermal analysis, the thermal decomposition mechanism of [Pb(NTO)2.H20] has been derived. The lattice enthalpy and its lattice energy were also estimated.

对苹果深加工进行系统研究。提出了以苹果汁为原料生产苹果酒和苹果乳酸饮品；提出了可利用榨汁后的苹果废渣生产柠檬酸、膳食纤维和果胶，同时，阐述了利用碰果、落果等不宜作为鲜果食用的苹果生产食用酒精和苹果白酒。

The single crystal of cobalt compound of 3-nitro-1,2,4-triazol-5-one (NTO) ([Co(H2O)6](NTO)2•2H2O) was prepared and the crystal structure has been determined by a four-circle X-ray diffractometer. The compound is monoclinic with space group Cc and unit cell parameters of a=2.3163 (2)nm, b=0.6451 (1) nm, c=1.4123 (1)nm, β=123.96 (1)◦, V=1.7504 (3)nm3 and Z=4. Based on the thermal analysis, the thermal decomposition mechanism of [Co(H2O)6](NTO)2•2H2O has been derived. 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 −(2594.7±4.5), −2753.19, and −2718.19 kJ mol−1, respectively.

H[Pr(NTO)4(H2O)4]-2H2O was prepared by mixing the aqueous solution of lithium 3-nitro-1,2,4-triazol-5-onate and the dilute nitric acid solution of Pr6O11. The single crystal structure has been determined by a four-circle X-ray diffractometer. The crystal is triclinic, space group P1 with crystal parameters of a=1.0463(10)nm, b=1.0484(10)nm, c=1.1474(10)nm,α=99.10(10)0, β=96. 96(10)0, r=97.65(10)0, V=1.2186(2)nm3, Z-2, Dc-2.088g-cmÿ3, u=21.17 cmÿ1, F(0 0 0)540. The final R is 0.0206. Based on the thermal analysis, the thermal decomposition mechanism of H[Pr(NTO)4(H2O)4]-2H2O has been derived. From measurements of the enthalpy of solution in water of H[Pr(NTO)4(H2O)4]-2H2O at 298.15 K, the standard enthalpy of formation, lattice energy and lattice enthalpy have been determined as ÿ(2884.1 8.9), ÿ5443.25 and ÿ5473.25 kJ molÿ1, respectively.