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Chemistry inside a Porphyrin Skeleton: Platinacyclopentadiene from Tellurophene

2020; Wiley; Volume: 26; Issue: 68 Linguagem: Inglês

10.1002/chem.202002677

1521-3765

Ewa Pacholska‐Dudziak, Grzegorz Vetter, Aleksandra Góratowska, Agata Białońska, Lechosław Latos‐Grażyński,

Surface Chemistry and Catalysis

Platinum(II) binds to 21,23-ditelluraporphyrin forming a side-on complex, which can be easily transformed into an aromatic metallaporphyrin, that is, 21-platina-23-telluraporphyrin, with a platinacyclopentadiene unit built in the porphyrin skeleton in place of one pyrrole ring. The central platinum(II) ion with a CCNTe square-planar coordination sphere can be oxidized to platinum(IV) by chlorine, bromine, methyl iodide or allyl chloride to yield octahedral complexes. All platinatelluraporphyrins show dynamic behavior involving the platinum ion coordination sphere fluxionality and the porphyrin skeleton deformation, both in-plane and out-of-plane, as demonstrated by 1 H NMR spectroscopy.