H-1 and C-13 NMR of some alpha-halo derivatives of o-xylene
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Data
1997-07-21
Autores
Rezende, D. D.
Alcantara, M. R.
Campos, IPD
Toscano, V. G.
Ebeling, G.
Lopes, JCD
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Elsevier B.V.
Resumo
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.
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Tetrahedron. Oxford: Pergamon-elsevier Science Ltd, v. 53, n. 29, p. 10113-10122, 1997.