Viscosities and densities for 1-butyl-3-methylimidazolium hexafluorophosphate （[C4mim][PF6]） and N, N-dimethylformamide （DMF） binary mixtures have been measured at the temperature range from 293.15 K to 318.15 K. ...Viscosities and densities for 1-butyl-3-methylimidazolium hexafluorophosphate （[C4mim][PF6]） and N, N-dimethylformamide （DMF） binary mixtures have been measured at the temperature range from 293.15 K to 318.15 K. It is shown that the viscosities and densities decrease monotonously with temperature and the content of DMF. Various correlation methods including Arrhenius-like equation, Sedclon et al.＇s equation, Redlich-Kister equation with four parameters, and other empirical equations were applied to evaluate these experimental data. A model based on an equation of state Ior estimating the viscosity of mixtures containing ionic liquids were proposed by coupling with the excess Gibbs free energy model of viscosity, which can synchronously calculate the viscosity and the molar volume. The results show that the model gives a deviation of 8.29% for the viscosity, and a deviation of 1.05% for the molar volume when only one temperature-independent adjustable parameter is adopted. The correlation accuracy is further improved when two parameters or one temperature-dependent parameter is used.展开更多
The title complex Cu[C5H3N(CCH3=N-C6H5)2]2(PF6)2 has been synthesized by r eaction of Schiff base C5H3N(CCH3=N-C6H5)2 and cupric sulfate in toluene solut ion. The crystal structure was determined by X-ray diffraction ...The title complex Cu[C5H3N(CCH3=N-C6H5)2]2(PF6)2 has been synthesized by r eaction of Schiff base C5H3N(CCH3=N-C6H5)2 and cupric sulfate in toluene solut ion. The crystal structure was determined by X-ray diffraction method and the chemical formula weight of the complex is 1041.85. The crystal structure belongs to triclinic system with spacegroup and cell parameters: a=12.6470(10) , b=14. 123(2) , c=15.613(2);á=66.150(10)a=79.470(10)?=78.290(10)穖-3 and F(000)=1064. The final R:R1=0.0668, wR 2=0.1927; R(all data): R1=0.1133, wR2=0.2357. The Cu was coordinated by six nitrogen, at the same time the Cu formed a distorted octahedron, besides the angles and pl anes of this compound were discussed . The result of kinetics of the thermal dec omposition indicated that the first step of it is 2 series chemical reactions, t he function of machanism is f(a)=(1-a)2, and the activation energy is 144.64E/ kJ. CCDC: 180872.展开更多
基金Supported by the National Natural Science Foundation of China （20476025, 20776040）, Shanghai Municipal Science and Technology Commission of China （05DJ14002） and Hubei Key Laboratory of Novel Chemical Reactor and Green Chemical Technology of China （XLHX2007002）.
文摘Viscosities and densities for 1-butyl-3-methylimidazolium hexafluorophosphate （[C4mim][PF6]） and N, N-dimethylformamide （DMF） binary mixtures have been measured at the temperature range from 293.15 K to 318.15 K. It is shown that the viscosities and densities decrease monotonously with temperature and the content of DMF. Various correlation methods including Arrhenius-like equation, Sedclon et al.＇s equation, Redlich-Kister equation with four parameters, and other empirical equations were applied to evaluate these experimental data. A model based on an equation of state Ior estimating the viscosity of mixtures containing ionic liquids were proposed by coupling with the excess Gibbs free energy model of viscosity, which can synchronously calculate the viscosity and the molar volume. The results show that the model gives a deviation of 8.29% for the viscosity, and a deviation of 1.05% for the molar volume when only one temperature-independent adjustable parameter is adopted. The correlation accuracy is further improved when two parameters or one temperature-dependent parameter is used.
文摘The title complex Cu[C5H3N(CCH3=N-C6H5)2]2(PF6)2 has been synthesized by r eaction of Schiff base C5H3N(CCH3=N-C6H5)2 and cupric sulfate in toluene solut ion. The crystal structure was determined by X-ray diffraction method and the chemical formula weight of the complex is 1041.85. The crystal structure belongs to triclinic system with spacegroup and cell parameters: a=12.6470(10) , b=14. 123(2) , c=15.613(2);á=66.150(10)a=79.470(10)?=78.290(10)穖-3 and F(000)=1064. The final R:R1=0.0668, wR 2=0.1927; R(all data): R1=0.1133, wR2=0.2357. The Cu was coordinated by six nitrogen, at the same time the Cu formed a distorted octahedron, besides the angles and pl anes of this compound were discussed . The result of kinetics of the thermal dec omposition indicated that the first step of it is 2 series chemical reactions, t he function of machanism is f(a)=(1-a)2, and the activation energy is 144.64E/ kJ. CCDC: 180872.
