Nuclear magnetic resonance studies of π-bonding in aminoboranes. Part 2.—Barrier to internal rotation about the boron-nitrogen bond

Abstract

60 MHz ¹H nuclear magnetic resonance spectra of several aminoboranes are investigated over a range of temperature, and kinetic characteristics for internal rotation about the boron-nitrogen bond are derived. The effects of varying boron and nitrogen substituents and, in one case, the concentration of the compound in a solvent are considered in terms of (p→p)π-bonding between nitrogen and boron.