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Single-crystal X-ray structures were obtained for the copper and μ-oxodiiron complexes of 2,3,7,8,12,13,17,18-octafluoro-5,10,15-triphenylcorrole, hereafter denoted as Cu[F 8 TPC] and {Fe[F 8 TPC]} 2 O. A comparison with the crystal structures of other undecasubstituted Cu corroles, including those with H, Ar, Br, I, and CF 3 as β-substituents, showed that the degree of saddling increases in the order: H ≲ F &lt; Ar ≲ Br ≲ I &lt; CF 3 . In other words, Cu[F 8 TPC] is marginally more saddled than β-unsubstituted Cu triarylcorroles, but substantially less saddled than Cu undecaarylcorroles, β-octabromo- meso -triarylcorroles, and β-octaiodo- meso -triarylcorroles, and far less saddled than Cu β-octakis(trifluoromethyl)- meso -triarylcorroles. As for {Fe[F 8 TPC]} 2 O, the moderate quality of the structure did not allow us to draw firm conclusions in regard to bond length alternations in the corrole skeleton and hence also the question of ligand noninnocence. The Fe-O bond distances, 1.712(8) and 1.724(8), however, are essentially identical to those observed for {Fe[TPFPC]} 2 O, where TPFPC 3- is the trianion of 5,10,15-tris(pentafluorophenyl)corrole, suggesting that a partially noninnocent electronic structural description may be applicable for both compounds.

Molecular Structure of Copper and μ-Oxodiiron Octafluorocorrole Derivatives: Insights into Ligand Noninnocence