A skeleton of N‐confused porphyrin (NC‐porphine) has been synthesized for the first time, through a [3+1] coupling reaction. A completely planar inner 3H tautomeric form was found in the crystals, and the molecular packing shows a sandwich herringbone structure similar to that of normal porphine, whilst some of the spectroscopic properties demonstrate systematic substituent effects by the meso‐phenyl groups on the N‐confused porphyrin. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
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Morimoto et al. (2005) studied this question.
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