Abstract

Abstract The interaction between water (H2O, HDO, D2O) or hydrogen chloride and iodine or bromine, (I−, I2, Br−, Br2) in argon matrices has been studied with IR spectroscopy. The spectra show that water forms a hydrogen bond to atomic iodine. Molecular iodine, atomic and molecular bromine are bound to the water oxygen. Hydrogen chloride forms hydrogen-bonded complexes with I−, I2, Br− and Br2. HDO forms preferentially deuterium bonds with atomic iodine but hydrogen-bonded HDO is present in equilibrium with the deuterium-bonded form. Temperature-dependency studies make it possible to estimate that the H-bonded form is 26 cm−1 less stable than the D-bonded form.

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