science-softCon uv/vis+ photochemistry database;	www.photochemistry.org; (C) science-softCon 2019

Substance: dichloromethyl radical			Other Names: 

Formula: CHCl2						CAS-No.: 3474-12-2

Study: uv absorption spectra; kinetics

                
Authors: P.B. Roussel, P.D. Lightfoot, F. Caralp, V. Catoire, R. Lesclaux, W. Forst

Title: Ultraviolet absorption spectra of the CH2Cl and CHCl2 radicals and the kinetics of their self-recombination reactions from 273 to 686 K

Journal/Source: J. Chem. Soc. Faraday Trans., 87, 2367-2377, (1991); DOI: 10.1039/FT9918702367


Data: table, diagram

energy/Wavelength range: 198 - 215 nm

Resolution: 2 nm

Temperature: 298 K

Temperature dependence: 

Pressure/Concentration: 29 - 760 Torr (N2 total pressure)

Phase: gas

pH:


Comments: At a resolution of 2 nm, no vibrational structure was detected in either spectrum which both appear as strong broad 
electronic bands with maxima around 200 nm (CH2Cl) and 215 nm (CHCl2). At these wavelengths the absolute absorption 
cross-sections were measured as (1.45 ± 0.16)× 10-17 and (1.37 ± 0.24)× 10-17 cm2 molecule-1, respectively, relative to that 
of CH3O2 at 240 nm (4.55 × 10-18 cm2 molecule-1).

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