Chengdu Branch,Chinese Science Academy,Chengdu610041)abstract:[Mn(ECZ)abstract: 3 ](NO 3 )abstract: 2 is newly prepared by the aqueous solutions of Mn(NO 3 )abstract: 2 and ethyl carbazate(ECZ)abstract:.The crystal st...Chengdu Branch,Chinese Science Academy,Chengdu610041)abstract:[Mn(ECZ)abstract: 3 ](NO 3 )abstract: 2 is newly prepared by the aqueous solutions of Mn(NO 3 )abstract: 2 and ethyl carbazate(ECZ)abstract:.The crystal structure has been determined by X-ray crystal diffraction analysis.It belongs to monoclinic with space group of P2 1 /n.The crystal parameters are:a=1.3974(2)abstract:nm,b=0.8796(2)abstract:nm,c=3.4322(7)abstract:nm,β=9 1.25(1)abstract:°,V=4.2175(1)abstract:nm 3 ,Z=8.Its molecular weight is491.30.Mn 2+ is located on the center of the molecular structure.Ethyl carbazate serves a s a bidentate ligand which coordinates to the metal cations with its carbonyl ox ygen atom and the terminal hydrazine nitrogen atom,forming five-member chelatin g rings,and three such rings are formed in each molecule.The coordination number of the metal ion is six and the coordination configuration of the cen-tral ion is octahedral.Specially,antimer configuration phenomenon is found in the molecu le.The complex is fur-ther characterized by element analysis and IR measurement s.The thermal decomposition mechanism is studied by using TG-DTG and DSC techni ques.CCDC:215675.展开更多
The thermal decomposition processes in solid state CoC2O4·2H2O have been studied in air using TG/DTA, DSC and XRD techniques. TG/DTA, DSC curves showed that the decomposition proceeded through two well-defined st...The thermal decomposition processes in solid state CoC2O4·2H2O have been studied in air using TG/DTA, DSC and XRD techniques. TG/DTA, DSC curves showed that the decomposition proceeded through two well-defined steps in air. Mass loss of the thermal decomposition of CoC2O4·2H2O was in good agreement with the theoretica1 one. XRD showed that the final product of the thermal decomposition was Co3O4. The activation energies were calculated through the ASTM E698 and Flynn-Wall-Ozawa (FWO) methods, and the possible conversion functions had been estimated through the multiple-linear regression method. The activation energies for the two steps decomposition of CoC2O4·2H2O were 140.18 kJ·mol-1 and 134.61 kJ·mol-1, respective1y.展开更多
The new complex, [K2(TNR)(H2O)]n, was prepared by reacting 2,4,6 trinitroresorcinol with potassium hyd roxide. Its crystal structure was determined by X ray single crystal diffraction analysis. The crystalline belongs...The new complex, [K2(TNR)(H2O)]n, was prepared by reacting 2,4,6 trinitroresorcinol with potassium hyd roxide. Its crystal structure was determined by X ray single crystal diffraction analysis. The crystalline belongs to triclinic with space group .Its unit cell parameters are as follows:a=0.6993(1)nm, b=0.9474(2)nm, c=0.9791(1)nm, α=115.28(1)°, β=107.86(1)°, γ=95.94(1)°, V=0.53717(15)nm3, Z=2, Dc=2.098g ·cm-3, F(000)=340. The two potassium ions have different coordination numbers of which are 8 and 9, respectively. The thermal decomposition mechanism of the complex was studied by using DSC, TG GTG and FT IR techniques. The existence of KNC in the residue is shown in FT IR. CCDC: 204441.展开更多
A heteronuclear compound, K2· 7H2O (Dipc=pyridine 2,6 dicarboxylic acid) has been synthe sized and characterized by IR, elemental analysis, and X ray diffraction. Crystal data: orthorhombic system with space grou...A heteronuclear compound, K2· 7H2O (Dipc=pyridine 2,6 dicarboxylic acid) has been synthe sized and characterized by IR, elemental analysis, and X ray diffraction. Crystal data: orthorhombic system with space group Pnna and unite cell parameters: a=2.0645(3)nm, b=1.3484(2)nm, c=0.8204(1)nm; V=2.2838(6)nm3, Z=4, Dcald=1.726 g· cm- 3, μ =1.193 mm- 1, F(000)=1212, Gof=1.045, Δ ρ =339～ - 348 e· nm- 3, the final R is 0.0295. In the molecule of the complex, Co? ion is six coordinate to form a distorted octahedron. The N atom and the carboxyl group of pyridine 2,6 dicarboxylic acid are coordinated with the central ions. One of the carboxyl groups of the pyridine 2,6 dicarboxylic acid connect K? and Co? . The com pound possesses approximate C2 symmetry. The compounds form a three dimensional network of infinite length connection with crystal waters, potassium ions and hydrogen bonds. The result of kinetics of thermal decomposition indicated that the compound decomposition takes place in two steps. CCDC: 207078.展开更多
文摘Chengdu Branch,Chinese Science Academy,Chengdu610041)abstract:[Mn(ECZ)abstract: 3 ](NO 3 )abstract: 2 is newly prepared by the aqueous solutions of Mn(NO 3 )abstract: 2 and ethyl carbazate(ECZ)abstract:.The crystal structure has been determined by X-ray crystal diffraction analysis.It belongs to monoclinic with space group of P2 1 /n.The crystal parameters are:a=1.3974(2)abstract:nm,b=0.8796(2)abstract:nm,c=3.4322(7)abstract:nm,β=9 1.25(1)abstract:°,V=4.2175(1)abstract:nm 3 ,Z=8.Its molecular weight is491.30.Mn 2+ is located on the center of the molecular structure.Ethyl carbazate serves a s a bidentate ligand which coordinates to the metal cations with its carbonyl ox ygen atom and the terminal hydrazine nitrogen atom,forming five-member chelatin g rings,and three such rings are formed in each molecule.The coordination number of the metal ion is six and the coordination configuration of the cen-tral ion is octahedral.Specially,antimer configuration phenomenon is found in the molecu le.The complex is fur-ther characterized by element analysis and IR measurement s.The thermal decomposition mechanism is studied by using TG-DTG and DSC techni ques.CCDC:215675.
文摘The thermal decomposition processes in solid state CoC2O4·2H2O have been studied in air using TG/DTA, DSC and XRD techniques. TG/DTA, DSC curves showed that the decomposition proceeded through two well-defined steps in air. Mass loss of the thermal decomposition of CoC2O4·2H2O was in good agreement with the theoretica1 one. XRD showed that the final product of the thermal decomposition was Co3O4. The activation energies were calculated through the ASTM E698 and Flynn-Wall-Ozawa (FWO) methods, and the possible conversion functions had been estimated through the multiple-linear regression method. The activation energies for the two steps decomposition of CoC2O4·2H2O were 140.18 kJ·mol-1 and 134.61 kJ·mol-1, respective1y.
文摘The new complex, [K2(TNR)(H2O)]n, was prepared by reacting 2,4,6 trinitroresorcinol with potassium hyd roxide. Its crystal structure was determined by X ray single crystal diffraction analysis. The crystalline belongs to triclinic with space group .Its unit cell parameters are as follows:a=0.6993(1)nm, b=0.9474(2)nm, c=0.9791(1)nm, α=115.28(1)°, β=107.86(1)°, γ=95.94(1)°, V=0.53717(15)nm3, Z=2, Dc=2.098g ·cm-3, F(000)=340. The two potassium ions have different coordination numbers of which are 8 and 9, respectively. The thermal decomposition mechanism of the complex was studied by using DSC, TG GTG and FT IR techniques. The existence of KNC in the residue is shown in FT IR. CCDC: 204441.
文摘A heteronuclear compound, K2· 7H2O (Dipc=pyridine 2,6 dicarboxylic acid) has been synthe sized and characterized by IR, elemental analysis, and X ray diffraction. Crystal data: orthorhombic system with space group Pnna and unite cell parameters: a=2.0645(3)nm, b=1.3484(2)nm, c=0.8204(1)nm; V=2.2838(6)nm3, Z=4, Dcald=1.726 g· cm- 3, μ =1.193 mm- 1, F(000)=1212, Gof=1.045, Δ ρ =339～ - 348 e· nm- 3, the final R is 0.0295. In the molecule of the complex, Co? ion is six coordinate to form a distorted octahedron. The N atom and the carboxyl group of pyridine 2,6 dicarboxylic acid are coordinated with the central ions. One of the carboxyl groups of the pyridine 2,6 dicarboxylic acid connect K? and Co? . The com pound possesses approximate C2 symmetry. The compounds form a three dimensional network of infinite length connection with crystal waters, potassium ions and hydrogen bonds. The result of kinetics of thermal decomposition indicated that the compound decomposition takes place in two steps. CCDC: 207078.
