ΔHf: -29.2 kcal/mol, REF: M. D. Harmony, V. W. Laurie, R. L. Kuczkowsky, R. H. Schwendeman, D. A. Ramsay, F. J. Lovas, W. J. Lafferty, A. G. Maki, J. Phys. Chem. Ref. Data 8, 3 (1979). Dipole: 0.5 Debye, REF: A. L. McClellan, "Tables of Experimental Dipole Moments," Vol 2, Rahara Enterprises, El Cerrito, (1974).