ΔHf: -35.0 kcal/mol, REF: D. R. Stull, H. Prophet, Natl. Stand., Ref. Data Ser. (U.S., Natl. Bur. Stand.) NSRDS-NBS 37, 1971. Dipole: 1.2 Debye, REF: "CRC Handbook of Chemistry and Physics," 60th Edition, R. C. Weast, (Ed.), CRC Press, Boca Raton, FL, 1980. I.P.: 11.4 eV, REF: J. H. D. Elan, Int. J. Mass Spect. Ion Phys. 4, 37 (1970).