<i>meso</i>
-Aryl [20]π Homoporphyrin: The Simplest Expanded Porphyrin with the Smallest Möbius Topology
作者:K. S. Anju、Mainak Das、B. Adinarayana、Cherumuttathu H. Suresh、A. Srinivasan
DOI:10.1002/anie.201709859
日期:2017.12.4
unstable conjugated homoporphyrin was successfully stabilized by introducing meso‐aryl substitutents. It was evident from the moderate diatropic ring current found by NMR analysis that the newly formed 20π conjugated free base and its protonated form exhibited Möbius aromatic character. Furthermore, complexation as a ligand with an RhI ion afforded a unique binding mode and retained the Möbius aromaticity
Synthesis, spectral, and single-crystal X-ray structural analysis of meso-aryl triphyrin(2.1.1) featuring three pyrrole rings and four meso-aryl rings are described. The title compound represents the first example of a ring-contracted meso-aryl beta-unsubstituted free-base triphyrin containing only pyrrole rings reported to date and generates 2-D supramolecular assembly In the solid state.