New Porphycene Ligands: Octaethyl‐ and Etioporphycene (OEPc and EtioPc)—Tetra‐ and Pentacoordinated Zinc Complexes of OEPc

Abstract

Steric interactions of the substituents weaken the strong NH … N hydrogen bonds (typical for porphycenes) in 1 (R = Me, Et) by increasing the N … N distance. As a consequence the coordination of metal ions, in particular of Zn2+ ions, is facilitated. These findings can be expected to give impetus to the research into metalloporphycenes.