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Synthesis, complexation properties and crystal structure of 4′,5‐dibromo‐ o ‐xylyl‐17‐crown‐5 ether
Author(s) -
GuoXiang Xiong,
QingFu Zhou,
HuiJun Xu
Publication year - 1996
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.19960140510
Subject(s) - chemistry , crown ether , anhydrous , alkali metal , ether , solvent , lithium (medication) , benzene , crystal structure , extraction (chemistry) , proton nmr , ion , crystallography , medicinal chemistry , organic chemistry , medicine , endocrinology
4′, 5′‐Dibromc‐ o ‐xylyl‐17‐crown‐5 ether (2BrB17C5) was synthesized, starting from 1,2‐dibromo‐4,5‐bis(bromomethyl)‐benzene and tetraethylene glycol, and was characterized by 1 H NMR, MS and elemental analysis. Pale yellow prismatic single crystal obtained from anhydrous ethanol was investigated by X‐ray structural analysis. The complexation properties toward alkali metal ions were examined using the solvent extraction method and UV absorption spectroscopy. The crown ether was found to be conformationally deformed and oblate‐like and is highly selective for lithium ion.