ΔHf: -60.2 kcal/mol, REF: D. D. Wagman, W. H. Evans, V. B. Parker, R. H. Schumm, I. Halow, S. M. Bailey, K. L. Churney, R. L. Nuttall, J. Phys. Chem. Ref. Data Suppl. 11, 2 (1982). Dipole: 2.5 Debye, REF: K. P. Huber, G. Herzberg, "Molecular Spectra and Molecular Structure," IV. "Constants for Diatomic Molecules," Van Nostrand, Reinhold, New York, (1979).