10546-01-7Relevant articles and documents
Spectrum and Mutual Kinetics of HOCH2CH2O2 Radicals
Anastasi, C.,Muir, D. J.,Simpson V. J.
, p. 5791 - 5797 (1991)
β-Hydroxyethyl peroxy radicals have been studied by using pulse radiolysis to generate the radicals and kinetic absorption to monitor their formation and decay.The ultraviolet absorption spectrum assigned to HOCH2CH2O2 is broadband in nature with a maximum absorption cross section of 3.5 (+/-0.6) * 10-18 cm2 molecule-1 at 230 nm.An overall rate constant for the self-reaction 2 HOCH2CH2O2 -> HOCH2CH2OH + HOCH2CHO + O2 (3a), 2 HOCH2CH2O2 -> 2 HOCH2CH2O + O2 (3b) of k3 = 7.7 (+/-1.2) * 10-12 cm3 molecule-1 s-1 was measured at room temperature together with an estimation of the branching ratio, k3a/k3 = 0.75 (+/-0.1).
Kinetics of the reaction Al + SF6 in the temperature range 499-813 K
Parker, James K.,Garland, Nancy L.,Nelson
, p. 307 - 311 (2002)
Rate constants as a function of temperature for the reaction Al + SF6 have been measured under pseudo-first-order conditions. Laser-induced fluorescence was used to monitor the relative concentrations of either the reactant Al or the primary pr
Neutron and β/γ radiolysis of water up to supercritical conditions. 2. SF6 as a scavenger for hydrated electron
Haygarth, Kyle,Bartels, David M.
, p. 7479 - 7484 (2010)
SF6 has been used as a specific scavenger to investigate the β/γ radiolysis yield of hydrated electrons in pressurized high temperature sub- and supercritical water. SF6 is thermally stable in supercritical water, and each scavenging reaction is known to produce six fluoride ions, which can be readily measured using a fluoride-selective electrode. Problems in the application of this method are described, including buildup of acid product and chain reduction of SF6 in the presence of organic ·H and ·OH radical scavengers. Ultimately we find that the combination of SF6 and phenol in neutral solution gives reliable results in supercritical water, because the protons and fluoride ions remain associated as HF molecules. The β/γ yields in supercritical water are similar to previous measurements using N2O scavenger.
Rate constants and vibrational energy disposal for reaction of H atoms with Br2, SF5Br, PBr3, SF5, and SF4
Malins, R. J.,Setser, D. W.
, p. 5666 - 5680 (2007/10/02)
Rate constants and initial HBr and HF product distributions for the title reactions were measured in a fastflow apparatus using infrared chemiluminescence techniques.The spectra were interpreted using a new set of Einstein coefficients for HBr, which are listed in the Appendix.The rate constants for HBr(υ>/=1) and HF(υ>/=1) formation, relative to the H+Cl2 reaction, are 3.3, 0.39, 0.50, 3.4, and 0.003, for Br2, SF5Br, PBr3, SF5, and SF4, respectively.This directly measured Br2 rate constant supports the smaller values that heve been estimeted in the literature.The initial HBr vibrational distribution (υ1:υ2:υ3:υ5=0.03:0.20:0.40:0.31:0.06) from H+Br2 corresponds to V>=0.49.The observed HBr vibrational distributions (υ1:υ2:υ3:υ4) are 0.28:0.43:0.23:0.06 and 0.63:0.24:0.13 for SF5Br and PBr3, respectively.The SF5Br results are close to the initial distribution and give V>=0.36.The low vapor pressure of PBr3 limited the and high was required to observe HBr emission; correcting the observed distribution for vibrational relaxation gives V ca. 0.47.These V > values include estimates for HBr(υ=0).Based upon the highest HBr level observed from SF5Br and PBr3, D0(Br-SF5)0(Br-PBr2)-1.The HF vibrational distributions from SF5 and SF4 decline with increasing υ, which suggests that these reactions proceed via a long-lived complex.For these cases the formation of HF(υ=0) is important, and significant corrwections must be made to the HF(υ>/=1) formation constants to obtain the total HF formation rate constants.The rate constants and energy disposal data are used to discuss models and compare the H+Br2 reaction to H+Cl2 and F2.
