par Chapman, Andrew A.V.;Cook, Michael M.J.;Katritzky, Alan Roy;Aabraham, Michael M.H.;Danil De Namor, Angela A.F.;Dumont, Liliane
;Reisse, Jacques 
Référence Tetrahedron, 34, 10, page (1571-1575)
Publication Publié, 1978


Référence Tetrahedron, 34, 10, page (1571-1575)
Publication Publié, 1978
Article révisé par les pairs
Résumé : | The dehydration of various 4,5-dihydro-4- and -5-hydroxy derivatives of pyrazole and isoxazole has been investigated. Heats of dehydration of 4,5-duiydro-4-hydroxy-1,3,5-tripbenylpyrazole and 4,5-dihydro-5-hydroxy-isoxazole are evaluated and used to assess the empirical resonance energy and conjugation energy of pyrazole and isoxazole. The former possesses resonance stabilisation comparable to pyrrole but that of the latter is low. © 1978. |