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Cover Picture: Highly Strained 2,3‐Bridged 2 H ‐Azirines at the Borderline of Closed‐Shell Molecules (Chem. Eur. J. 4/2011)
Author(s) -
Banert Klaus,
Meier Barbara,
Penk Enrico,
Saha Biswajit,
Würthwein ErnstUlrich,
Grimme Stefan,
Rüffer Tobias,
Schaarschmidt Dieter,
Lang Heinrich
Publication year - 2011
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201190011
Subject(s) - nitrene , singlet state , chemistry , ring (chemistry) , shell (structure) , molecule , open shell , cover (algebra) , substitution (logic) , cycloaddition , crystallography , photochemistry , materials science , physics , excited state , organic chemistry , catalysis , atomic physics , mechanical engineering , engineering , composite material , programming language , computer science
Triplet nitrenes and highly strained, closed‐shell 2,3‐bridged 2H‐azirines undergo quite different dimerization reactions to give unsymmetrical monocyclic or symmetrical tricyclic products. The picture schematically illustrates these pathways on singlet and triplet hypersurfaces. In their Full Paper on page 1128 ff. , K. Banert, E.‐U. Würthwein, S. Grimme, et al. investigated, both experimentally and by quantum chemical methods, the intermediates that resulted from the irradiation of cyclic vinyl azides as a function of ring size, substitution pattern, and reaction conditions.