%0 Journal Article %T Ring-strain release in neutral and dicationic 7,8,17,18-tetra-bromo-5,10,15,20-tetra-phenyl-porphyrin: crystal structures of C44H26Br4N4 and C44H28Br4N4 2+¡¤2ClO4 £¿¡¤3CH2Cl2 %A Allen G. Oliver %A Hugues F. Duval %A W. Robert Scheidt %J Archive of "Acta Crystallographica Section E: Crystallographic Communications". %D 2016 %R 10.1107/S2056989016007349 %K crystal structure %K prophyrin %K hydrogen bonding %K ring puckering %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4908563/