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First Structure Analysis and Photoelectron Spectroscopic Investigation of an Azete and an Azete‐Cobalt Complex
Author(s) -
Ledermann Martin,
Regitz Manfred,
Angermund Klaus,
Binger Paul,
Krüger Carl,
Mynott Richard,
Gleiter Rolf,
HylaKryspin Isabella
Publication year - 1988
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.198815591
Subject(s) - antiaromaticity , valence (chemistry) , delocalized electron , crystallography , chemistry , electron delocalization , cobalt , ring (chemistry) , crystal structure , aromaticity , stereochemistry , computational chemistry , molecule , inorganic chemistry , organic chemistry
The antiaromatic 2,3‐di tert ‐butyl‐4‐mesityl axete 1 exists in the crystal only as the valence isomer 1A . The four‐membered ring has the structure of a distorted rectangle, and the interplanar angle between the aromatic and antiaromatic rings is 70°. The valence isomer 1B participates to at most 5% in an equilibrium ( 13 C NMR). In contrast, the bond lengths in the four‐membered ring are almost equal in the azete‐cobalt complex 2 because of electron delocalization.
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