Chemistry inside a Porphyrin Skeleton: Platinacyclopentadiene from Tellurophene |
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Authors: | Dr Ewa Pacholska-Dudziak Grzegorz Vetter Aleksandra Góratowska Dr Agata Białońska Prof Lechosław Latos-Grażyński |
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Institution: | Department of Chemistry, University of Wroclaw, ul. Joliot-Curie 14, 50-383 Wroclaw, Poland |
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Abstract: | 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 1H NMR spectroscopy. |
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Keywords: | heteroporphyrin metallacycle metalloporphyrin platinacyclopentadiene tellurophene |
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