The molecule Bcl was generated by chlorination of B(s) with both MgCl2 and SrCl2 in a heated effusive beam source, and identified by mass spectrometry. Gaseous equilibria in the B–Mg–Cl and B–Sr–Cl systems were studied in the regions 1350–1600 K and 1760–1830 K, respectively, and the dissociation energy D0°(Bcl)=121.3±1.1 kcal mol−1 (5.26±0.05 eV) was derived from thermochemical analysis. When compared with a dissociation limit derived from a short upper state extrapolation, this result indicates a potential hump of about 6 kcal mol−1 in the A 1Π state of Bcl. Electron impact measurements yielded an ionization potential of 10.03±0.10 eV for Bcl, which can be used to evaluate D0°(Bcl+)=81.4±2.6 kcal mol−1 (3.53±0.11 eV). Other values in the literature, some of which differ considerably from the new results, are discussed.
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Research Article| December 15 1996
Dissociation energies of the molecules Bcl and Bcl+
D. L. Hildenbrand; Dissociation energies of the molecules Bcl and Bcl+. J. Chem. Phys. 15 December 1996; 105 (23): 10507–10510. https://doi.org/10.1063/1.472770
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