Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.


The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

High Accuracy Measurements of OH Reaction Rate Constants and IR Absorption Spectra: Substituted 2-Propanols



Vladimir L. Orkin, Victor Khamaganov, Michael J. Kurylo III


Rate constants for the gas phase reactions of OH radicals with 2-propanol and three fluorine substituted 2-Propanols, (CH3)2CHOH (k0), CF3)2COH (k1), (CF3)2C(OH)CH3 (k2), and (CF3)3COH (k3) were measured using a flash photolysis resonance-fluorescence technique over the temperature range 220 K to 370 K. The Arrhenius plots were found to exhibit noticeable curvature for all four reactions. The temperature dependences of the rate constants can be represented by the following expressions: k0(T) = 1.4610-11exp(-883/T) + 1.3010-12exp(+371/T) cm3 molecule-1 s-1, k1(T) = 1.1910-12exp(-1207/T) + 7.8510-16exp(+502/T) cm3 molecule-1 s-1, k2(T) = 1.6810-12exp(-1718/T) + 7.3210-16exp(+371/T) cm3 molecule-1 s-1, k3(T) = 3.0010-20(T/298)11.3exp(+3058/T) cm3 molecule-1 s-1, The atmospheric lifetimes due to reactions with tropospheric OH were estimated to be 2.4 days and 1.9, 6.3, and 46 years, respectively. UV absorption cross-sections were measured between 160 nm and 200 nm. The IR absorption cross-sections of the three fluorinated compounds were measured between 450 cm 1 and 1900 cm-1 and their global warming potentials were estimated.
Journal of Physical Chemistry A


iso-propanol, 1, 1, 1, 3, 3, 3-hexafluoro-2-propanol, 1, 1, 1, 3, 3, 3-hexafluoro-2-methyl-2-propanol, 1, 1, 1, 3, 3, 3-hexafluoro-2-(trifluoromethyl)-2-propanol, perfluoro-tert-butanol, atmospheric lifetime, global warming potential
Created February 28, 2012, Updated March 17, 2017