Extraction of cesium from nitric acid solutions by bis-[4(5),4′(5′)-alkanoylbenzo]-21-crown-7 in nitrobenzene or nitromethane was investigated.The results show that under the conditions of higher acidity and higher ...Extraction of cesium from nitric acid solutions by bis-[4(5),4′(5′)-alkanoylbenzo]-21-crown-7 in nitrobenzene or nitromethane was investigated.The results show that under the conditions of higher acidity and higher sodium concentration,the extraction efficiency of bis-[4(5),4′(5′)-alkanoylbenzo]-21-crown-7 was superior to that of DB21C7.The composition of the complexes was determined indirectly by measuring the conductance of cesium nitrate-crown ether in nitromethane solution.It indicated that these crown ethers probably formed 1∶1∶1 Cs^+∶crown∶nitrae complex ion pair in the organic phase.The extraction equilibrium was also discussed.展开更多
The complex dimethylgallium- [4-nitro-2- (N-benzo- 15-crown-5 ) - 1 -phenoxide ] (C23H31 N2O7Ga) has been synthesized by the method reported. The crystal X-ray diffraction analysis shows that the crystal belongs to th...The complex dimethylgallium- [4-nitro-2- (N-benzo- 15-crown-5 ) - 1 -phenoxide ] (C23H31 N2O7Ga) has been synthesized by the method reported. The crystal X-ray diffraction analysis shows that the crystal belongs to the triclinic with space group P1, M = 517. 23 and the unit cell parameters: a = 1. 4501 (2), b = 1. 5090(2), c = 1. 3865 (6)nm, a = 105. 58(1 ), β = 117. 26(2), γ = 66. 812(8)°, V= 2. 464546nm3, Z =4, Dc = 1. 39g· cm-3, u = 11. 6cm-1, F(000) = 1080, R = 0. 051, Rw = 0. 064. The coordination number of Ga is four and the gallium atom is located in a distorted tetrahedron structure.展开更多
文摘Extraction of cesium from nitric acid solutions by bis-[4(5),4′(5′)-alkanoylbenzo]-21-crown-7 in nitrobenzene or nitromethane was investigated.The results show that under the conditions of higher acidity and higher sodium concentration,the extraction efficiency of bis-[4(5),4′(5′)-alkanoylbenzo]-21-crown-7 was superior to that of DB21C7.The composition of the complexes was determined indirectly by measuring the conductance of cesium nitrate-crown ether in nitromethane solution.It indicated that these crown ethers probably formed 1∶1∶1 Cs^+∶crown∶nitrae complex ion pair in the organic phase.The extraction equilibrium was also discussed.
文摘The complex dimethylgallium- [4-nitro-2- (N-benzo- 15-crown-5 ) - 1 -phenoxide ] (C23H31 N2O7Ga) has been synthesized by the method reported. The crystal X-ray diffraction analysis shows that the crystal belongs to the triclinic with space group P1, M = 517. 23 and the unit cell parameters: a = 1. 4501 (2), b = 1. 5090(2), c = 1. 3865 (6)nm, a = 105. 58(1 ), β = 117. 26(2), γ = 66. 812(8)°, V= 2. 464546nm3, Z =4, Dc = 1. 39g· cm-3, u = 11. 6cm-1, F(000) = 1080, R = 0. 051, Rw = 0. 064. The coordination number of Ga is four and the gallium atom is located in a distorted tetrahedron structure.
