Otro
H-1 and C-13 NMR of some alpha-halo derivatives of o-xylene
Registro en:
Tetrahedron. Oxford: Pergamon-elsevier Science Ltd, v. 53, n. 29, p. 10113-10122, 1997.
0040-4020
10.1016/S0040-4020(97)00352-9
WOS:A1997XM15000025
Autor
Rezende, D. D.
Alcantara, M. R.
Campos, IPD
Toscano, V. G.
Ebeling, G.
Lopes, JCD
Resumen
C-13 and H-1 NMR data for a series of alpha-halo derivatives of o-xylene are presented. A dynamic H-1 NMR investigation of alpha,alpha,alpha',alpha'-tetrabromo-o-xylene (5) was performed and the spectrum of the most stable conformer at 213 K is presented. The free energy of activation for the rotation of the CHBr2 groups in 5 are determined for the first time. (C) 1997 Elsevier Science Ltd.