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Issue 34, 2016
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The reaction of CF2Cl2 with gas-phase hydrated electrons

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Abstract

The reaction of dichlorodifluoromethane (CF2Cl2) with hydrated electrons (H2O)n (n = 30–86) in the gas phase was studied using Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry. The hydrated electron reacts with CF2Cl2, forming (H2O)mCl with a rate constant of (8.6 ± 2.2) × 10−10 cm3 s−1, corresponding to an efficiency of 57 ± 15%. The reaction enthalpy was determined using nanocalorimetry, revealing a strongly exothermic reaction with ΔHr(CF2Cl2, 298 K) = −208 ± 41 kJ mol−1. The combination of the measured reaction enthalpy with thermochemical data from the condensed phase yields a C–Cl bond dissociation enthalpy (BDE) ΔHC–Cl(CF2Cl2, 298 K) = 355 ± 41 kJ mol−1 that agrees within error limits with the predicted values from quantum chemical calculations and published BDEs.

Graphical abstract: The reaction of CF2Cl2 with gas-phase hydrated electrons

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Supplementary files

Article information


Submitted
24 Mar 2016
Accepted
03 Aug 2016
First published
03 Aug 2016

This article is Open Access

Phys. Chem. Chem. Phys., 2016,18, 23910-23915
Article type
Paper
Author version available

The reaction of CF2Cl2 with gas-phase hydrated electrons

J. Lengyel, C. van der Linde, M. Fárník and M. K. Beyer, Phys. Chem. Chem. Phys., 2016, 18, 23910
DOI: 10.1039/C6CP01976E

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