Abstract
Using a 5s3p contracted gaussian basis set with polarization functions, potential curves for twelve low-lying valence states of BN+, and for three states of BN-, were obtained by the MRD-CI method. The ground state of BN+ is 4-. Spectroscopic constants for all but one excited state are given, and are compared with those of BC and C+ 2. The ground state of BN- is 2+. From the obtained energies, ionization potentials and electron affinities for BN are predicted.