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Organoboron Complexes in Edge‐Sharing Macrocycles: The Triphyrin(2.1.1)–Tetraphyrin(1.1.1.1) Hybrid
Author(s) -
Stawski Wojciech,
Hurej Karolina,
Skonieczny Janusz,
Pawlicki Miłosz
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201904819
Subject(s) - boron , chromophore , chemistry , stereochemistry , crystallography , combinatorial chemistry , photochemistry , organic chemistry
The formation of a precisely designed environment predefined for stabilizing electron‐deficient atoms, such as boron(III), is an important approach for optimizing the properties of a chromophore. A triphyrin(2.1.1) motif built on the extended π‐system of a tetraphyrin(1.1.1.1) skeleton creates a new coordination environment, with a CNN set of donors confined in a limited space predefined for binding small cations. The entrapment of boron(III) in the triphyrin(2.1.1) sector, with formation of a direct B−C bond, significantly changes the optical response and the global aromatic character of the compound, leading to an extension of the π‐delocalisation.