Recognition of Dicarboxylic Acid by 6,6′-Dipivaloylamino-3,3′-bipyridine and the Supramolecular Solid State Locking of the Carboxyls in the anti Form

Abstract

A new crystal-engineering motif has been developed where a ditopic receptor 1 having anti binding hindered pyridine pivaloylamide groups instead of normally used acetylamino groups shows a novel anti–anti hydrogen bonded polymeric supramolecular complex giving rise to hydrogen bonded stair like polymeric ribbon structure between the receptor pyridine amides and the carboxyl groups of the guest substrate (1,4-phenylenediacetic acid).