Collisions of O(1D) with HF, F2, XeF2, NF3, and CF4: Deactivation and reaction

Abstract

The reactions of O(1D) atoms with fluorides have been investigated by time-resolved laser magnetic resonance (LMR). O(1D) atoms were produced by the dissociation of ozone with an excimer laser (KrF, 248 nm). By monitoring Cl atoms (when HCl or Cl2 is added) or FO radicals, the rate constants for total removal of O(1D) (×10−11 cm3/s) by HF(5.1±1.0), F2(0.81±0.20), XeF2(16±3.0), NF3(1.2±0.25), and CF4(<0.016) have been determined at 298 K. Reaction rate constants (×10−11 cm3/s) have been obtained for HF(1.5±0.3), F2(0.81±0.2), XeF2(14±3.0), and NF3(1.0±0.3). The deactivation of O(1D) by HX (X=F, Cl, Br) is discussed. Ab initio calculations have been performed with the aim of qualitative comparison of deactivation of O(1D) by F2 and Cl2.