Infrared spectra of ClF, Cl2, and Cl complexes with HCl in solid argon

Abstract

Argon mixtures of ClF, Cl2, and Cl atoms have been codeposited with Ar/HCl at 5 and 12 K. Infrared spectra in the HCl stretching region give evidence for the FCl--HCl, Cl2--HCl, and Cl--HCl hydrogen-bonded complexes. The molecular complexes are more stable in the hydrogen-bonded than antihydrogren-bonded forms as no evidence for the latter were observed. The Cl--HCl radical hydrogen-bonded complex is considerably different from the centrosymmetric (Cl–H–Cl)− anion.