High-level electronic structure calculation has been performed on the noble-gas molecules OBArF, OBKrF, and OBXeF. The energetics of the two unimolecular dissociation pathways, (1) OBNgF --> OB + Ng + F, and (2) OBNgF --> OBF + Ng, were also calculated. The B-Ng bonds were calculated to be 1.8-2.2 Angstrom and were found to be covalent in nature. Highly positive charges were assigned to B and Ng atoms and highly negative charges to O and F atoms. Both unimolecular dissociation pathways were found to have high energy barriers (>15 kcal/mol), and thus suggests that OBNgF are dynamically stable species. (C) 2004 Elsevier B.V. All rights reserved.