Jörg Breitenbach

An unusual copper(I) complex of a new macrocyclic ligand

The new 18-membered macrocyclic ligand 1,5(2,6)dipyridina-3,7(1,4)dipiperazinaoctacyclophane, † shows an allosteric effect upon complexation with copper(I) chloride in aqueous ethanol resulting in an extraordinary copper complex, the structure of which has been established by X-ray diffraction analysis.

The first [2.2]pyridonophane: preparation, structure and hydrogen bond pattern with water

The dimethoxydiselena[3.3]pyridinophane 3 was prepared and transformed into 7,15-dihydroxy[2.2](2,6)pyridinophane 5a in 35% yield; the X-ray analysis of 5 proved the tautomeric structure 5b, in which [2.2]pyridonophane units are linked by water molecules to form infinite, hydrogen bonded layers.