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The macrocyclic amine, 1,5,9,18,22,26-hexaaza [11.11]- p -cyclophane ( 1 ) contains two dipropylenetriamine units which make the molecule highly basic. Owing to this basicity,  1  can be highly protonated in acidic media and can form supramolecular assemblies with different anions. Two new supramolecular structures arise from self-assembly of the salt of  1  with fumaric acid and of the N-methyl derivative of  1 .

Molecular recognition. 1. Crystal structures of hexaazamacrocyclic amines containing p-xylylene spacers and their adducts with acids