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Twist with Twin Porphyrin
L. K. Frensch, K. Pröpper, M. John, S. Demeshko, C. Brückner*, F. Meyer*
Georg-August-Universität Göttingen, Germany and University of Connecticut, Storrs, USA
18 March 2011 (online)
The expanded porphyrin 3, incorporating two pyrazole and four pyrrole units, was obtained from the key building block 1. Interestingly, this molecule involves nonaromatic π-systems due to the replacement of pyrroles by pyrazoles, whereas general porphyrins show aromatic conjugations.