Cationic nickel( ii) complexes of two ring-contracted porphyrinoid ligands distantly related to the corrins were prepared by metal templated macrocyclisation. The compounds show reversible electron transfer processes and were found to be the first porphyrinoid-based catalysts for C–C cross-coupling.
†Electronic supplementary information (ESI) available: Preparation and analytical data of 7 and 8; details of DFT calculations and catalytic investigations. CCDC 1057061. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c5sc03663a
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