Synthesis and Reductive Complexation Properties of a Cone-Configurated Tetra[p-(tert-butyl)]calix[4]arene incorporating bipyridyl and pyridine subunits. NMR characterization and crystal structure of its chiral copper(I) complex

✍ Scribed by Jean-Bernard Regnouf De Vains; Roger Lamartine; Bernard Fenet; Claude Bavoux; Alain Thozet; Monique Perrin

• Publisher: John Wiley and Sons
• Year: 1995
• Tongue: German
• Weight: 758 KB
• Volume: 78
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.19950780615

✦ Synopsis

The hetero-armedp-(tert -butyl)calix[4]arene 1 was synthesized by a stepwise procedure. This ligand presented a very strong complexing behavior towards Cu', giving the chiral complex 2 and parent species when reacted with Cu" salts. High-resolution NMR techniques were employed for the characterization of 2, demonstrating notably exchange processes between its two enantiomeric forms. The racemic nature of 2 was confirmed by X-ray crystal-structure analysis. I)