science-softCon uv/vis+ photochemistry database;	www.photochemistry.org; (C) science-softCon 2020

Substance: chlorine anion				Other Names: dichloride anion

Formula: Cl2(-)						CAS-No.: 	PubChem: CID 

Study: UV extinction coefficients


Authors: G.G. Jayson, B.J. Parsons, A.J. Swallow

Title: Some simple, highly reactive, inorganic chlorine derivatives in aqueous solution. Their formation using pulses of radiation and their role in the mechanism of the Fricke dosimeter

Journal/Source: J. Chem. Soc., Faraday Trans. 1, 69, 1597-1607, (1973); https://doi.org/10.1039/F19736901597


Data: table, diagram

Energy/Wavelength range: 230 - 450 nm

Resolution: 

Temperature: 298 K

Temperature dependence: no

Pressure/Concentration: 

Phase: aqueous solution of 10^-2 M L-1 Cl-, Ar saturated, 10^-1 mol L-1 perchloric acid

pH: 1


Comments: The absorption spectra of ClOH– and Cl2(-) have been measured in the range 230–450 nm. Cl2(-) absorption has a maximum at 340 nm where the extinction coefficient is 8.8 ± 0.5 × 1000 l. mol–1 cm–1, 
whereas ClOH– has a maximum at 350 nm with an extinction coefficient of 3.7 ± 0.4 × 103 l. mol–1 cm–1.

see R.L. Hug, Nat. Stand. Ref. Data Ser., Nat. Bur. Stand. (U.S.), 69, 1-167, (1981).