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Stable Five‐Membered‐Ring Allenes with Second‐Row Elements Only: Not Allenes, But Zwitterions
Author(s) -
Christl Manfred,
Engels Bernd
Publication year - 2009
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.200803476
Subject(s) - allene , zwitterion , ring (chemistry) , derivative (finance) , chemistry , computational chemistry , molecule , organic chemistry , catalysis , financial economics , economics
A pyrazole derivative , considered as the stable five‐membered cyclic allene 1 a by Dyker, Bertrand, et al., is reinterpreted to be a zwitterion 1 b . It is shown that the bonding characteristics typical for an allene are not possible for structure 1 a . Ar=2,6‐dimethylphenyl.
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