In this paper,the dibenzo-14-crown-4(DB14C4,abbreviation of Dibenzo-14-crown-4) is synthesized by the ultrasonic synthesis method when use 1,3-dibromopropane and pyrocatechol as starting material,dimethyl sulfoxide(DM...In this paper,the dibenzo-14-crown-4(DB14C4,abbreviation of Dibenzo-14-crown-4) is synthesized by the ultrasonic synthesis method when use 1,3-dibromopropane and pyrocatechol as starting material,dimethyl sulfoxide(DMSO) as solvent,and lithium hydroxide as catalyst and template reagent.The experiment result shows that the new synthetic method has some properties such as simple operation(no protection of nitrogen gas),short reaction time(50min),high yield(42.2%),etc.and it is a extensive new method for synthesis of crown.展开更多
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
Eight derivatives of 1,3-dimethyl-5-methylthio-4-phenylhydrazonocarboxyl pyrazole were synthesized from 1,3-dimethyl-5-methylthio-4-hydrazinocarboxyl pyrazole. All compounds synthesized were identified by 1H NMR and e...Eight derivatives of 1,3-dimethyl-5-methylthio-4-phenylhydrazonocarboxyl pyrazole were synthesized from 1,3-dimethyl-5-methylthio-4-hydrazinocarboxyl pyrazole. All compounds synthesized were identified by 1H NMR and elemental analysis. Some of them exhibited certain growth inhibition action to Phoma asparagi, Alternaria solani, Gibberella zeae, Physalospora piricola, Colletotrichum lagenarium as tested in vitro at dosage of 50 mg/L.展开更多
4′-acetylbenzo-15-crown-5thiosemicarbazone was synthesized with high yield (94%)via the reaction of 4′-acetylbenzo-15-crown-5 and thiosemicarbazide under the microwave irradiation and hydrochloric acid as the cataly...4′-acetylbenzo-15-crown-5thiosemicarbazone was synthesized with high yield (94%)via the reaction of 4′-acetylbenzo-15-crown-5 and thiosemicarbazide under the microwave irradiation and hydrochloric acid as the catalyst.Its structure was determined by single-crystal X-ray diffraction.The crystal belongs to triclinic crystal system,P-1 space group,a=9.5470(19)?,b=13.637(3)?,c=16.029(3)?,α=75.33(3)°,β=83.62(3)°,γ=70.99(3)°,V=1097.8(7)s assembled into supramolecule structure by intermolecular hydrogen bonds.展开更多
文摘In this paper,the dibenzo-14-crown-4(DB14C4,abbreviation of Dibenzo-14-crown-4) is synthesized by the ultrasonic synthesis method when use 1,3-dibromopropane and pyrocatechol as starting material,dimethyl sulfoxide(DMSO) as solvent,and lithium hydroxide as catalyst and template reagent.The experiment result shows that the new synthetic method has some properties such as simple operation(no protection of nitrogen gas),short reaction time(50min),high yield(42.2%),etc.and it is a extensive new method for synthesis of crown.
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.
文摘Eight derivatives of 1,3-dimethyl-5-methylthio-4-phenylhydrazonocarboxyl pyrazole were synthesized from 1,3-dimethyl-5-methylthio-4-hydrazinocarboxyl pyrazole. All compounds synthesized were identified by 1H NMR and elemental analysis. Some of them exhibited certain growth inhibition action to Phoma asparagi, Alternaria solani, Gibberella zeae, Physalospora piricola, Colletotrichum lagenarium as tested in vitro at dosage of 50 mg/L.
文摘4′-acetylbenzo-15-crown-5thiosemicarbazone was synthesized with high yield (94%)via the reaction of 4′-acetylbenzo-15-crown-5 and thiosemicarbazide under the microwave irradiation and hydrochloric acid as the catalyst.Its structure was determined by single-crystal X-ray diffraction.The crystal belongs to triclinic crystal system,P-1 space group,a=9.5470(19)?,b=13.637(3)?,c=16.029(3)?,α=75.33(3)°,β=83.62(3)°,γ=70.99(3)°,V=1097.8(7)s assembled into supramolecule structure by intermolecular hydrogen bonds.
