The fullerene complex, η 2 C 60 [Ru(NO)(PPh 3)] 2, has been prepared by the reaction of C 60 with Ru(NO) 2(PPh 3) 2 under a nitrogen atmosphere and refluxing. The new complex was characterized by means of elemental a...The fullerene complex, η 2 C 60 [Ru(NO)(PPh 3)] 2, has been prepared by the reaction of C 60 with Ru(NO) 2(PPh 3) 2 under a nitrogen atmosphere and refluxing. The new complex was characterized by means of elemental analysis, IR, XPS, electronic spectra and 31 P NMR. The results show that the complex of η 2 form can be formed by C 60 bonding to Ru(NO) 2(PPh 3) 2 in the σ π way and there is hyperconjugation effect in the molecule. So electrons will flow easier and photoelectric effect for this new compound is expected. In addition, the structure of the complex has been supposed. The ruthenium is 4 coordinate in the complex, bonding to two carbon atoms, to one PPh 3 and to one NO.展开更多
采用PAN为显色剂,通过分光光度法测定反应体系中催化剂Pd(PPh3)2Cl2的浓度,以探讨氯苄单羰基化合成苯乙酸反应中Pd(PPh3)2Cl2水解失活的动力学方程.结果表明,Pd2+与PAN显色的较佳条件为:在10 mL 1～20×10-6Pd2+含量的溶液中,加入0....采用PAN为显色剂,通过分光光度法测定反应体系中催化剂Pd(PPh3)2Cl2的浓度,以探讨氯苄单羰基化合成苯乙酸反应中Pd(PPh3)2Cl2水解失活的动力学方程.结果表明,Pd2+与PAN显色的较佳条件为:在10 mL 1～20×10-6Pd2+含量的溶液中,加入0.5 mL0.04%的PAN,在pH=3.0、40℃的水浴中加热30 min;其摩尔吸光系数e=1.384×104 L·mol-1·cm-1;Pd(PPh3)2Cl2水解反应对三苯基膦氯化钯浓度呈0.5级;对三苯基膦浓度呈-0.8级;对苯乙酸浓度呈2级;对碱中和剂NaOH的浓度呈1.2级.Pd(PPh.)2C12水解反应的活化能E=75.59 kJ·mol-1,指前因子为1.68×1012.展开更多
FTIR spectrum at liquid nitrogen temperature and IH NMR of air-sensitive polyhydride Ru(H)_2(H_2)(PPh_3)_3 have been measured for the first time. It is found that a fluxional process happens at room temperature, but t...FTIR spectrum at liquid nitrogen temperature and IH NMR of air-sensitive polyhydride Ru(H)_2(H_2)(PPh_3)_3 have been measured for the first time. It is found that a fluxional process happens at room temperature, but the structure of Ru(H)_2(H_2)(PPh_3)_3 with non-equivalent hydrogens is discernible at low temperature.展开更多
Spectrophotometric method was used to evaluate the kinetic of the complex formation from the reaction between H[Ru(III)Cl2(H2EDTA)] and the modifier agent [3-(2-aminoethyl)aminopropyl] trimethoxysilane (AEATS) (μ = 0...Spectrophotometric method was used to evaluate the kinetic of the complex formation from the reaction between H[Ru(III)Cl2(H2EDTA)] and the modifier agent [3-(2-aminoethyl)aminopropyl] trimethoxysilane (AEATS) (μ = 0.50 mol.dm-3 with NaCF3COO, 298.15 K), in pseudo-first order conditions. These studies showed that the reactions are successives producing several species influenced by the concentrations ratio. The electronics spectrum of all solutions showed a band in 457 nm with variable molar absorptivity (ε).展开更多
A ruthenium based catalytic system([Ru(p-cymene)Cl2]2/XantPhos with substoichiometric Cs2CO3)has been established to effectively achieve the first direct amination cyclization of 1,2,4-butanetriol with primary aromati...A ruthenium based catalytic system([Ru(p-cymene)Cl2]2/XantPhos with substoichiometric Cs2CO3)has been established to effectively achieve the first direct amination cyclization of 1,2,4-butanetriol with primary aromatic amines.The product of this sustainable hydrogen autotransfer process is valuable Naryl-3-pyrrolidinol.展开更多
文摘The fullerene complex, η 2 C 60 [Ru(NO)(PPh 3)] 2, has been prepared by the reaction of C 60 with Ru(NO) 2(PPh 3) 2 under a nitrogen atmosphere and refluxing. The new complex was characterized by means of elemental analysis, IR, XPS, electronic spectra and 31 P NMR. The results show that the complex of η 2 form can be formed by C 60 bonding to Ru(NO) 2(PPh 3) 2 in the σ π way and there is hyperconjugation effect in the molecule. So electrons will flow easier and photoelectric effect for this new compound is expected. In addition, the structure of the complex has been supposed. The ruthenium is 4 coordinate in the complex, bonding to two carbon atoms, to one PPh 3 and to one NO.
基金financially supported by the National Science Foundation of China (Grants Nos.21727810 and 21475035)Foundation for Innovative Research Groups of NSFC (21521063)
文摘FTIR spectrum at liquid nitrogen temperature and IH NMR of air-sensitive polyhydride Ru(H)_2(H_2)(PPh_3)_3 have been measured for the first time. It is found that a fluxional process happens at room temperature, but the structure of Ru(H)_2(H_2)(PPh_3)_3 with non-equivalent hydrogens is discernible at low temperature.
文摘Spectrophotometric method was used to evaluate the kinetic of the complex formation from the reaction between H[Ru(III)Cl2(H2EDTA)] and the modifier agent [3-(2-aminoethyl)aminopropyl] trimethoxysilane (AEATS) (μ = 0.50 mol.dm-3 with NaCF3COO, 298.15 K), in pseudo-first order conditions. These studies showed that the reactions are successives producing several species influenced by the concentrations ratio. The electronics spectrum of all solutions showed a band in 457 nm with variable molar absorptivity (ε).
基金the National Natural Science Foundation of China (No. 21672027)QingLan Project of Jiangsu Province (2016)+1 种基金SixTalent-Peaks Program of Jiangsu (2016) for financial supportsupported by High-Level Entrepreneurial Talent Team of Jiangsu Province (No.2017-37)
文摘A ruthenium based catalytic system([Ru(p-cymene)Cl2]2/XantPhos with substoichiometric Cs2CO3)has been established to effectively achieve the first direct amination cyclization of 1,2,4-butanetriol with primary aromatic amines.The product of this sustainable hydrogen autotransfer process is valuable Naryl-3-pyrrolidinol.
