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syn ‐ and anti ‐[2.2]Orthometacyclophane
Author(s) -
Bodwell Graham,
Ernst Ludger,
Haenel Matthias W.,
Hopf Henning
Publication year - 1989
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.198904551
Subject(s) - cyclophane , chemistry , stereochemistry , crystallography , crystal structure
The fifth [2.2]cyclophane to be isolated—after o,o ‐, m,m ‐, p,p ‐, and m,p ‐cyclophane—is the o,m isomer 1 . Only the o,p compound is absent in this series of strained arenes. The barrier for the transformation of syn ‐ 1 to anti ‐ 1 (see below) presumably lies between 20 and 24 kcal mol −1 .
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