40423-14-1Relevant articles and documents
Infrared band intensities of bromine nitrate, BrONO2
Orphal, Johannes,Morillon-Chapey, Mireille,Guelachvili, Guy
, p. 44 - 47 (2008)
The integrated band intensities at 296 K of gaseous bromine nitrate (BrONO2) in the spectral range 500-2000 cm-1 have been measured using Fourier-transform absorption spectroscopy. The absorption spectra were calibrated to absolute a
Gas-Phase Structures of Chlorine Nitrate and Bromine Nitrate (ClONO2 and BrONO2)
Casper, Bernd,Lambotte, Peter,Minkwitz, Rolf,Oberhammer, Heinz
, p. 9992 - 9995 (1993)
The gas-phase structure of chlorine nitrate was determined by joint analysis of electron diffraction intensities and rotational constants.The structure of bromine nitrate was derived from electron diffraction data alone.Both nitrates have planar structures, and the following geometric parameters were obtained (ra distances in angstroms and angles in degrees; error limits are 2? values and include a possible scale error of 0.1percent for BrONO2): for ClONO2, ra(N=O) = 1.196(1), ra(N-O) = 1.499(3), ra(O-Cl) = 1.673(2), (O=N=O) = 132.6(5), (O-N=Oc) =118.6(3), (O-N=Ot) = 108.8(3), (N-O-Cl) = 113.0(3); for BrONO2, ra-((N=O) = 1.205(3), ra(N-O) = 1.456(5), ra(O-Br) = 1.829(4), (O=N=O) = 133.9(8), (O-N=Oc) = 119.5(6), (O-N=Ot) = 106.6(5), (N-O-Br) = 113.9(8).The gas-phase structure for ClONO2 is compared to the crystal structure and to ab initio predictions.The results for both compounds are discussed together with those of other covelent nitrates XONO2 with X = H, Me, Et, and O2N.
Heterogeneous hydrolysis and reaction of BrONO2 and Br2O on pure ice and ice doped with HBr
Aguzzi, Arnaud,Rossi, Michel J.
, p. 5891 - 5901 (2007/10/03)
The rate of uptake of bromine nitrate (BrONO2) and dibromine monoxide (Br2O) on different types of ice, such as condensed (C), bulk (B), and single-crystal ice (SC) have been investigated in a Teflon-coated Knudsen flow reactor in the temperature range 180-210 K using mass spectrometric detection. For the whole temperature range the Br2O uptake kinetics is first order in [Br2O] with a mean initial uptake coefficient of γ0 = 0.24 ± 0.10, which leads to the exclusive formation of HOBr. The BrONO2 hydrolysis has been measured on B-,C-, and SC-type ice and leads to HOBr and Br2O on all types of ice. At a fixed temperature the rate law is first order in [BrONO2] with γ ≈ 0.3 at 180 K. The observed negative temperature dependence for the heterogeneous hydrolysis of BrONO2 on pure ice leads to Ea of -2.0 ± 0.2, -2.1 ± 0.2, and -6.6 ± 0.3 kcal/mol on C-, B- and SC-type ice, respectively. Despite the high reactivity of BrONO2 on ice substrates, the kinetics of interaction of BrONO2 on ice nevertheless depends on the type of ice used. No saturation of the uptake coefficient has been observed during the BrONO2 hydrolysis on ice in contrast to the ClONO2/ice system. On ice samples doped with approximately 5 × 1016 molecules HBr per cm3 the kinetics of the interaction of BrONO2 with HBr leads to an uptake coefficient similar to that for BrONO2 hydrolysis. The interaction of BrONO2 with HBr occurs via the hydrolysis of BrONO2 to HNO3 and HOBr where the latter reacts with HBr in a fast secondary reaction to produce Br2 with Ea = -1.2 ± 0.2 kcal/mol.
