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腙型双冠醚对碱金属的配位性能
引用本文:陆国元,王德粉,匙晓林,胡宏纹.腙型双冠醚对碱金属的配位性能[J].无机化学学报,1989,5(4):72-78.
作者姓名:陆国元  王德粉  匙晓林  胡宏纹
作者单位:南京大学化学系 南京 (陆国元,王德粉,匙晓林),南京大学化学系 南京(胡宏纹)
基金项目:中国科学院科学基金资助课题
摘    要:本文报道了五个腙型双冠醚的合成。电导测定结果表明含苯并-15-冠-5单元的双冠醚与四苯基硼酸钾、铷、铯,含苯并-18-冠-6单元的双冠醚与四苯基硼酸铯生成2:1夹心型配合物(冠醚单元:金属离子)。并用这些双冠醚的氯仿溶液萃取苦味酸碱金属盐水溶液,测定了萃取百分率和计算了萃取平衡常数,结果表明腙型双冠醚的萃取能力及选择性优于相应的单冠醚。

关 键 词:双冠醚  电导法  苦味酸盐  萃取
收稿时间:1988/2/25 0:00:00

COMPLEXATION PROPERTY FOR ALKALI METAL SALTS OF HYDRAZONE TYPE BIS-CROWN ETHERS
Lu Guoyuan,Wang Defeng,Shi Xiaolin and Hu Hongwen.COMPLEXATION PROPERTY FOR ALKALI METAL SALTS OF HYDRAZONE TYPE BIS-CROWN ETHERS[J].Chinese Journal of Inorganic Chemistry,1989,5(4):72-78.
Authors:Lu Guoyuan  Wang Defeng  Shi Xiaolin and Hu Hongwen
Institution:Department of Chemistry, Nanjing University, Nanjing,Department of Chemistry, Nanjing University, Nanjing,Department of Chemistry, Nanjing University, Nanjing and Department of Chemistry, Nanjing University, Nanjing
Abstract:Five hydrazones containing two benzocrown units were prepared by the reaction of bishydrazines containing pyrimidine, triazine, pyridinc rings and the 4'-formyl bcnzo-15-crown-5, benzo-18-crown-6 ethers with good yields. All these new bis-crown ethers were characterized by elemental analysis, IR, 'HNMR, and MS. The stoichiometry of the complexes formed by the bis-crown ethers with alkali metal cation was determined by elcctroconductivity titration of the ligand with alkali metal tetraphenylborate solutions. The result show that the bis-crown ethers containing benzo-15-crown-5 units formed 2 : 1 (crown ether unitsrmetal ion) sandwich type complexes with potassium, rubidium and cesium ions. But the bis-crown ethers containing benzo-18-crown-6 units only formed 2 : 1 complexes with cesium ion. In addition, extraction were carried out from aqueous alkali metal picrates solution with bis-crown ethers solution in chloroform and extraction equilibrium constants were also evaluated. The results indicate that their extractability and cation-selectivity are more effectively than the corresponding monocyc'ic crown ethers.
Keywords:bis-crown ether conductometry picrate extraction
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