Effect of guest molecules, metal ions and linker length on the assembly of chiral [2+2] metallomacrocycles: solutions studies and crystal structures

Abstract

Eight new 2,2′-bipyridines, containing functionalised acetylenes at the 6 position, have been prepared. The azido derivatives were used to prepare three compounds L1, L2 and L3, which contain pyromellitimide spacers connected to 6,6′-disubstituted 2,2