THE FIRST OBSERVATION OF THERMAL TRANSFORMATION OF STRAINED PARACYCLOPHANE INTO THE DEWAR-ISOMER

Authors
OKUYAMA M OHKITA M TSUJI T
Citation
M. Okuyama et al., THE FIRST OBSERVATION OF THERMAL TRANSFORMATION OF STRAINED PARACYCLOPHANE INTO THE DEWAR-ISOMER, Chemical communications, (14), 1997, pp. 1277-1278
Citations number
14
Categorie Soggetti
Chemistry
Journal title
Chemical communications → ACNP
ISSN journal
13597345
Issue
14
Year of publication
1997
Pages
1277 - 1278
Database
ISI
SICI code
1359-7345(1997):14<1277:TFOOTT>2.0.ZU;2-Y
Abstract
The kinetic stabilization of the [4]paracyclophane structure in the 2, 5-bis(dicyanomethylene)-2-ene derivative permits the first observation of thermal isomerization of a strained paracyclophane to the Dewar va lence tautomer; the activation free energy for the process is 18.3 +/- 0.3 kcal mol(-1) at -20 degrees C.