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σ, π‐Isomerisierungen von Monohetero‐σ‐bishomobenzol‐Derivaten. Vorläufige Mitteilung
Author(s) -
Stusche D.,
Breuninger M.,
Prinzbach H.
Publication year - 1972
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19720550710
Subject(s) - chemistry , stereochemistry , kinetic energy , computational chemistry , quantum mechanics , physics
The cis ‐oxa‐ ( 13a‐d ) and ‐aza‐σ‐bishomobenzene ( 13 e ) derivatives have been synthesized; they are sufficiently stable to be isolated in pure form. On heating, 13a‐e are easily isomerized into the π‐bishomobenzene analogues 14a‐e , the processes 13 a ⇄ 14 a , 13 b ⇄ 14b and 13d ⇄ 14d being reversible. Some kinetic and thermodynamic data for these σ, π,bishomobenzene transformations are presented.