Many Faces of Dipyrrins: from Hydrogen-Bonded Networks to Homo- and Heteronuclear Metallamacrocycles

The amphoteric 5-(4-cyanophenyl)dipyrrin ligand, offering three
distinct states, i.e., cationic, neutral, and anionic, has been exploited
for the formation of a 1-D hydrogen-bonded network in its
protonated form and both homo- and heterobinuclear metallamacrocycles, in its neutral and deprotonated states, respectively, with
a variety of coordination modes.