The F + HN3 system: A chemical source for NF(a1Δ)

Article abstract of DOI:10.1021/j100286a039

The secondary reaction in the F + HN₃ reaction system under conditions of excess [F] provides a good source of NF(a¹Δ) in a flow reactor. Comparison of the NF(a) yield from the F/HN₃ system with the yield from the H/NF₂ system suggests that ?85% of the HN₃ can be converted to NF(a). The F + N₃ secondary reaction has a rate constant of (5 ± 2) × 10^-11 cm³ molecule^-1 s^-1. The primary reaction yields HF(v) with a distribution, P₁-P₄ of 36:36:22:06; the HF(v≥1) formation rate constant is (8.5 ± 0.9) × 10^-11 cm³ molecule^-1 s^-1. From the highest observed HF(v,J) level, D₀(H-N₃) and ΔH_f°₀ (N₃) were assigned as ≤93 and ≤113 kcal mol^-1, respectively. Qualitative observations suggest a bimolecular NF(a) self-removal rate constant or a HF quenching rate constant of ～5 × 10^-13 cm³ molecule^-1 s^-1.