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Isolation of the Triplet Ground State Aminyl Diradical
Author(s) -
Boratyński Przemysław J.,
Pink Maren,
Rajca Suchada,
Rajca Andrzej
Publication year - 2010
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.201002811
Subject(s) - diradical , singlet state , triplet state , chemistry , ground state , photochemistry , singlet fission , spin (aerodynamics) , dimer , molecule , atomic physics , excited state , physics , thermodynamics , organic chemistry
Spin cycle : A high‐spin nitrogen‐centered (aminyl) diradical with a triplet ( S =1) ground state (see picture) has a large singlet‐triplet energy gap (Δ E ST ). Effective shielding of the reactive aminyl radical centers provides stability at room temperature and maintains the planarity of the π system required for the triplet ground state and large Δ E ST value. The diradical assembles in solution to form a π‐dimer‐like structure with weak exchange coupling.