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A flexible expanded heterocorrole: tellura[22]porphyrin(6.1.1.0).
Autorzy
Rok wydania
2019
Czasopismo
Journal of Porphyrins and Phthalocyanines
Numer woluminu
23
Strony
1470-1477
DOI
10.1142/s1088424619501621
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
An expanded heterocorrole, meso-tetraaryl-tellura[22]porphyrin(6.1.1.0), containing a bipyrrole moiety and a six-carbon long link, has been synthesized. The reaction path proceeds through a controlled acid-promoted extrusion of one tellurium atom from meso-aryl-26,28-ditellurasapphyrin, leading to a structure where one tellurophene ring of the substrate is replaced by a bridging acyclic four-carbon unit. This aromatic porphyrin-annulene hybrid is conformationally flexible in solution, on account of the C4 unit adopting two different configurations: trans–cis–trans or all-trans. Studies of the dynamic behavior of tellura[22]porphyrin(6.1.1.0) in solution were performed by means of 1H and 125Te NMR spectroscopy. The X-ray structure of the all-trans form with trapezoid macrocyclic skeleton is also presented.
Słowa kluczowe
sapphyrin, annulene, tellurium, conformational flexibility
Adres publiczny
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