Synthesis, crystal structures and complexing ability of difunctionalized copillar[5]arene Schiff bases

A series of difunctionalized copillar[5]arene Schiff bases from the condensation of salicylaldehyde and its 5-chloro, 5-bromo, 3,5-di(t-butyl) substituted derivatives with corresponding di-amino-functionalized pillar[5]arenes were successfully prepared. The single crystal structures and coordination properties to some transition metal ions were investigated.