A short intramolecular hydrogen bond is a key factor in the self-assembly of a dimeric complex with a 22-membered metallamacrocyclic cavity
Abstract
The reaction of copper(II) perchlorate with the new open chain oxime–amide ligand, N,N′-bis(2-hydroxyiminopropionyl)butane-1,4-diamine (H2pab) in aqueous solution produced the dimeric complex [Cu(Hpab)]2[ClO4]2·4H2O containing a 22-membered macrocyclic cavity incorporating two copper(II) ions as a part of the ring framework.