Bonding studies of compounds of boron and the Group IV elements. Part V. Boron-11 nuclear magnetic resonance data for the boron trihalides and mixed trihalides

Abstract

The ¹¹B n.m.r. spectra for each of the boron halides BXYZ (X, Y, Z = F, Cl, Br, or I) have been examined. Chemical shifts relative to BF₃,OEt₂, and ¹¹B–¹⁹F coupling constants have been measured. The observed coupling constants were compared with calculated values, by use of various MO theories. Reasonable correlation was obtained by two independent methods.