Abstract
The 1,4-alternate tetrahomodioxacalix[4]arene tetraamide 4 with four p-phenyl groups on its upper rim was synthesized. In two-phase metal picrate extraction, 4 exhibited Pb2+ selectivity with formation of a 1:1 complex in chloroform. In the solid-state structure of the 4·Pb(Pic)2 complex, Pb2+ is bound by the carbonyl oxygens of two adjacent amide groups and an aryl-alkyl ether oxygen atom of one of these amide-containing substituents. The crystal structure and 1H NMR spectrum of the 4·Pb2+ complex reveals π-metal ion complexation of one aromatic ring in the ligand with Pb2+.
Original language | English |
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Pages (from-to) | 5976-5980 |
Number of pages | 5 |
Journal | Journal of Organic Chemistry |
Volume | 66 |
Issue number | 18 |
DOIs | |
Publication status | Published - 2001 Sep 7 |
Externally published | Yes |
ASJC Scopus subject areas
- Organic Chemistry