Two molecules containing two 2,5-diamido,3,4-dichloropyrrole units linked via 1,3- or 1,4-substituted benzene rings have been synthesized. The pyrrole groups in these compounds deprotonate in the presence of tetrabutylammonium fluoride and form pyrrole anion dimers via NH...N- hydrogen bonds. This dimerization process results in the formation of polyanionic chains linked via an unusual "orthogonal" hydrogen-bonding array.

This study synthesized a new class of anionic supramolecular polymers containing 3,4-dichloro-2,5-diamido-substituted pyrrole anion dimers, resulting in polyanionic chains linked via an unusual "orthogonal" hydrogen-

Paper

Anion-anion assembly: a new class of anionic supramolecular polymer containing 3,4-dichloro-2,5-diamido-substituted pyrrole anion dimers.

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