13536-59-9Relevant articles and documents
Herman, M.,Johns, J. W. C.,McKellar, A. R. W.
, p. 405 - 412 (1982)
Low-temperature Kinetics of the Charge- and Atom-Transfer Reactions (Br+, HBr+ [2∏i, ν+, DBr+ [2∏i, ν+]) + (HBr, DBr) → (HBr+, DBr+, H2Br +, D2Br+, HDBr+)
Belikov, Andrey E.,Smith, Mark A.
, p. 3447 - 3456 (2007/10/03)
The charge- and atom-transfer reactions between Br+, HBr +, and DBr+ ions and HBr and DBr molecules have been studied in a HBr + DBr + He free jet. The ionic reactants in specific internal states were prepared by resonance multiphoton ionization of either HBr or DBr, and the ionic products were analyzed by mass spectrometry. A set of eight energetically possible reactions was considered in each case, including ions born in near-resonant ionization and photodissociation processes. Kinetic equations were integrated numerically over the appropriate reaction time and an optimization problem was solved to determine rate coefficients fit to final fractions of all ions measured in an experiment. Analytical expressions for the final fractions also were obtained and were used to derive the rate coefficients more accurately. The work is an example of a multireaction study without direct observation of all the reaction products.
Kinetic study of the reactions of Br with HO2 and DO2
Bedjanian, Yuri,Riffault, Véronique,Bras, Georges Le,Poulet, Gilles
, p. 573 - 578 (2007/10/03)
The kinetics of the reactions of Br atoms with HO2 and DO2 radicals, Br + HO2 → HBr + O2 (1), and Br + DO2 → DBr + O2 (3), have been studied by the mass spectrometric discharge-flow method at temperatures between 230 and 355 K and at a total pressure of 1 Torr of helium. The rate coefficients measured under pseudo-first-order conditions in excess Br yield the following Arrhenius expressions: k1 = (4.9 ± 0.7) × 10-12 exp[-(310 ± 40)/T] and k3 = (1.9 ± 0.4) × 10-12 exp[-(540 ± 60)/T] cm3 molecule-1 s-1 (uncertainties are 2σ). The k3 value is measured for the first time and that of k1 is compared with those from previous studies.
Photolysis of argon matrices containing tribromoboron and dihydrogen: Synthesis of hydroboranes via dibromoboron
Moroz, Antoni,Sweany, Ray L.
, p. 5236 - 5242 (2008/10/08)
Ultraviolet irradiation (λ = 254 nm) of argon matrices containing BBr3 and high concentrations of H2 produces an intermediate, BBr2, which reacts with H2 to form HBBr2, H2BBr, and HBr. The intermediate is completely destroyed by irradiation at 680 nm, the position of a broad absorption band, producing the same hydrogenation products that form by using ultraviolet radiation. The reaction of BBr2 with HD gives HBr and DBBr2 1.6 times more readily than DBr and HBBr2. The spectrum of BBr2 has been reported earlier; herein we reassign the totally symmetric B-Br stretching mode to a weak band at 551.0 cm-1. There is no evidence that either BBr2 or BBr3 forms a ground-state complex with hydrogen in spite of the fact that BBr2 forms more readily in the presence of H2 and that it is readily converted into HBBr2 and H2BBr by H2. However, a complex of hydrogen and BBr2 in its first excited state may lead to the hydrogenation products. The yield of H2BBr is greatest when the concentration of hydrogen in the matrix is greater than about 10 mol %. Both hydrogen atoms that make up the H2BBr come from the same molecule of hydrogen. Mixtures of H2 and D2 give H2BBr and D2BBr with only a trace of HDBBr whereas matrices containing HD produce only HDBBr.
