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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 international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201607237
Subject(s) - dimer , homolysis , dissociation (chemistry) , dehydrogenation , photochemistry , chemistry , singlet state , spectroscopy , bond dissociation energy , radical , organic chemistry , atomic physics , excited state , catalysis , physics , quantum mechanics
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).