Molecular Design of Crown Ethers(ⅩⅩ)-- Syntheses and Cation Selectivities of Benzo-15-crown-5 Derivatives Containing Thiocycle and Selenacycle

Abstract

Abstract: Two novel benzo-15-crown-5 derivatives containing thiocycle(3) and selenacycle(4) have been synthesized in the presence of Na₂S·9H₂Oor Na₂Se₂and characterized by elemental analysis and mass, IR, UVand₁H NMRspectroscopy.The cation binding abilities and selectivities of parent benzo-15-crown5(1) and its derivatives3 and4 with alkali and heavy metal ions have been evaluated by solvent extraction of aqueous metal picrates.The results obtained indicated that novel selera₃cyclopentene[3,4 d]benzo-15-crown-5(4) showed moderate extractability and selectivity for Ag⁺over any other alkali and heavy metal ions

Key words: Benzo-15-crown-5 derivatives, Synthesis, Extractability, Cation selectivity

CLC Number:

O612

TrendMD:

ZHANG Heng-Yi, YANG Ying-Wei, LIU Yu . Molecular Design of Crown Ethers(ⅩⅩ)-- Syntheses and Cation Selectivities of Benzo-15-crown-5 Derivatives Containing Thiocycle and Selenacycle[J]. Chem. J. Chinese Universities, 2000, 21(12): 1858.

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Molecular Design of Crown Ethers(ⅩⅩ)-- Syntheses and Cation Selectivities of Benzo-15-crown-5 Derivatives Containing Thiocycle and Selenacycle

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