Ft-ir spectroscopic study of uracil derivatives and their hydrogen-bonded complexes with model proton donors .6. proton-transfer in uracil - hcl complexes isolated in concentrated or strongly annealed argon matrices
Graindourze, M × Smets, J Zeegershuyskens, T Maes, Guido #
Elsevier science bv
Journal of Molecular Structure vol:318 pages:55-64
FT-IR spectra are reported for mixtures of uracils with relatively large amounts of hydrogen chloride in annealed Ar matrices. The observation of spectral characteristics typical for C=O+ ... Cl- ... (HCl)n species demonstrates that hydrogen bonding of one or more additional proton donor molecules to the rather strong 1:1 complex C = O ... HCl leads to partial proton transfer. Isotopic ratios obtained from HCl/DCl dilution experiments support the spectral assignments and analysis. The identity of the counter anion [Cl ... (HCl)n] is discussed.