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Cover Picture: The Fluorenyl Cation (Angew. Chem. Int. Ed. 9/2015)
Author(s) -
Costa Paolo,
Trosien Iris,
FernandezOliva Miguel,
SanchezGarcia Elsa,
Sander Wolfram
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201500658
Subject(s) - chemistry , synthon , stereochemistry
The fluorenyl cation is a highly reactive, antiaromatically destabilized carbenium ion. In their Communication on page 2656 ff., W. Sander, E. Sanchez‐Garcia et al. report how this cation can be synthesized and spectroscopically characterized in amorphous water ice at cryogenic temperatures. In protic solvents at room temperature, the lifetime is only a few picoseconds, whereas in ice below 30 K, even after several hours, no reaction is observed.