1H and 13C NMR of Some α-Halo Derivatives of o-Xylene

Abstract

13C and 1H NMR data for a series of α-halo derivatives of o-xylene are presented. A dynamic 1H NMR investigation of α,α,α′,α′-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. © 1997 Elsevier Science Ltd.