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Reversible Carbon–Carbon Bond Breaking and Spin Equilibria in Bis(pyrimidinenorcorrole)
Author(s) -
Liu Bin,
Yoshida Takuya,
Li Xiaofang,
Stępień Marcin,
Shinokubo Hiroshi,
Chmielewski Piotr J.
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201607237
Subject(s) - dimer , chemistry , dissociation (chemistry) , photochemistry , homolysis , dehydrogenation , singlet state , spectroscopy , mass spectrometry , bond dissociation energy , radical , organic chemistry , catalysis , excited state , atomic physics , physics , quantum mechanics , chromatography
Reversible homolytic dissociation of the bis(pyrimidinenorcorrole) σ‐dimer was elucidated by means of variable temperature ESR and 1 H NMR spectroscopy, mass spectrometry, and optical spectrocopy. Dehydrogenation of the σ‐dimer yielded another dimer displaying a singlet–triplet equilibrium in solution, strong NIR absorption (1570 nm), and a narrow electrochemical HOMO–LUMO gap (0.74 V).