What does this research mean for the field?

The gas-phase reaction of Cl atoms with (E)-CF3CF2CH=CHCF2CF3 (F22E) is pressure-independent between 50-300 Torr, exhibits Cl-atom regeneration at temperatures ≥253 K, and proceeds with a temperature-dependent rate coefficient well-represented by the Arrhenius expression k(243–323 K) = (2.09 ± 0.2) × 10^-12 exp[(+290 ± 40)/T]. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

This work aims to measure the reaction rate coefficients for the Cl-atom reacting with F22E under various conditions.

June 6, 2026International Journal of Chemical KineticsOpen Access

Reaction Rate Coefficients and Adduct Formation in the Cl Atom + ( E )‐CF 3 CF 2 CH=CHCF 2 CF 3 Reaction

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Authors

MSMaria-Areti I. SpanoudakiNational Oceanic and Atmospheric Administration DHDaniel Van HoomissenNational Oceanic and Atmospheric Administration VPVassileios C. PapadimitriouNational Oceanic and Atmospheric Administration

Discussion

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Implication

Experimental analysis measures reaction rates in gas-phase Cl-atom and F22E interactions, suggesting implications for atmospheric chemistry.

Key Points

This work aims to measure the reaction rate coefficients for the Cl-atom reacting with F22E under various conditions.
Utilized pulsed laser photolysis-resonance fluorescence (PLP-RF) technique to measure rate coefficients from 243-323 K and 50-300 Torr.
Analyzed Cl-atom temporal profiles to determine reaction rates and equilibrium constants for adduct formation.
Conducted quantum-mechanical calculations for thermodynamic parameters.
Rate coefficient at 296 K measured as (5.5 ± 0.7) × 10 −12 cm 3 molecule −1 s −1.
Equilibrium constant for Cl-F22E adduct formation calculated; Δ r H = −(12.2 ± 0.1) kcal mol −1 and Δ r S = −17.4 cal K −1 mol −1.
Measured rate for Cl-F22E-adduct + O 2 reaction at 296 K is ∼2.00 × 10 −15 cm 3 molecule −1 s −1.

Cite This Study

Spanoudaki et al. (2026) studied this question.

synapsesocial.com/papers/6a23bad471a5da9775e7667a https://doi.org/10.1002/kin.70096

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Implication

Experimental analysis measures reaction rates in gas-phase Cl-atom and F22E interactions, suggesting implications for atmospheric chemistry.