ΔHf: -63.5 kcal/mol, REF: M. W. Chase, C. A. Davies, J. R. Downey, D. R. Frurip, R. A. McDonald, A. N. Syverud, JANAF Thermochemical Tables, Third Edition, J. Phys. Chem. Ref. Data 14, Suppl. 1 (1985). Dipole: 1.5 Debye, REF: F. J. Lovas, E. Tiemann, J. Phys. Chem. Ref. Data 3, 609 (1974).