Synthesis and extraction studies of 1,2- and 1,3-disubstituted butylcalix[4]arene amides with oxyions; geometric and conformational effects

Abstract

26,28-(Dibutylcarbamoyl)methoxy-5,11,17,23-tert-butylcalix[4]arene and two geometric isomers of 27,28-(dibutylcarbamoyl)methoxy-5,11,17,23-tert-butylcalix[4]arene have been used to extract U^VI, Mo^VI, Cr^VI and Se^VI from aqueous solution into toluene or isooctane.

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