Reference Label	Details
LeRoy 1971	R. J. LeRoy and R. B. Bernstein, J. Mol. Spectr. 37, 109-130 (1971) Dissociation Energies and Long-Range Potentials of Diatomic Molecules from Vibrational Spacings: The Halogens Note: The anal. yields improved D0 values for the ground X 1Sigmag+ states of 35.35Cl2, 79.79Br2, 81.81Br2, and 127.127I2, resp., as follows: 19 997.25 (±0.3), 15 894.5 (±0.4), 15 896.6 (±0.5), and 12 440.9 (±1.2) cm-1
note Cl2	D0(Cl2) = 19997.25 +- 0.3 cm-1 of LeRoy 1971 was corrected from 35Cl to average Cl atomic weight of 35.4527 by adding 1.84 cm-1. The correction has been obtained by comparing ZPEs (including the Y00 term), which were estimated for the natural isotopic composition by applying standard isotopic relationships to the spectroscopic constants given by Herzberg 1950. This approach neglects possible electronic isoptopic shifts.
LeRoy 1970d	R. J. LeRoy and R. B. Bernstein, Chem. Phys. Lett. 5, 42-44 (1970) Dissociation Energies of Diatomic Molecules from Vibrational Spacings of Higher Levels: Applications to the Halogens
LeRoy 1970b	R. J. LeRoy and R. B. Bernstein, J. Chem. Phys. 52, 3869-3879 (1970) Dissociation Energy and Long-Range Potential of Diatomic Molecules from Vibrational Spacings of Higher Levels Note: D0(35Cl2) = 20879.75 +- 0.15 cm-1; ex [3361]