fragmentation of ethyl bromide

Gardiner SH(1), Karsili TN, Lipciuc ML, Wilman E, Ashfold MN, Vallance C. Author information: (1)Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Rd, Oxford OX1 3TA, UK. Find NCBI SARS-CoV-2 literature, sequence, and clinical content: https://www.ncbi.nlm.nih.gov/sars-cov-2/. Clipboard, Search History, and several other advanced features are temporarily unavailable. 2016 Jun 28;144(24):244312. doi: 10.1063/1.4954373. 2017 Jul 7;147(1):013941. doi: 10.1063/1.4983704. 14 publications. Ethyl halide cations were formed through vacuum ultraviolet (VUV) photoionization of the respective neutral parent molecules at 118.2 nm, and were photolysed at a number of ultraviolet (UV) photolysis wavelengths, including 355 nm and wavelengths in the range from 236 to 266 nm. Please reconnect. On the other hand, the KERDs for the ethyl bromide ion dissociation were statistical only in the region of the ground electronic state. The experimental studies are complemented by spin-orbit resolved ab initio calculations of cuts through the potential energy surfaces (along the RC-Br/I stretch coordinate) for the ground and first few excited states of the respective cations. HX (X = Br, I) elimination from the highly internally excited C2H5X+ cation is deemed the most probable route to forming the C2H4 (+) fragment ions observed from both cations.  |  Article Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. COVID-19 is an emerging, rapidly evolving situation. Time-offlight mass spectra and velocity-map images have been acquired for all fragment ions and for ground (Br) and spin-orbit excited (Br*) bromine atom products, allowing multiple fragmentation pathways to be investigated. The photodissociation dynamics of ethyl bromide and ethyl iodide cations (C2H5Br+ and C2H5I+) have been studied. HX (X = Br, I) elimination from the highly internally excited C2H5X+ cation is deemed the most probable route to forming the C2H4 (+) fragment ions observed from both cations. Analysis of the velocity-map images indicates that photoexcited C2H5Br+ cations undergo prompt C-Br bond fission to form predominantly C2H5+ + Br* products with a near-limiting ` parallel' recoil velocity distribution. HX (X = Br, I) elimination from the highly internally excited C2H5X+ cation is deemed the most probable route to forming the C2H4+ fragment ions observed from both cations. article provided that the correct acknowledgement is given with the reproduced material. If you are not the author of this article and you wish to reproduce material from The photodissociation dynamics of ethyl bromide and ethyl iodide cations (C2H5Br(+) and C2H5I(+)) have been studied. Epub 2007 May 29.  |  Time-of-flight mass spectra and velocity-map images have been acquired for all fragment ions and for ground (Br) and spin–orbit excited (Br*) bromine atom products, allowing multiple fragmentation pathways to be investigated. Tae Geol Lee, Wei Liu, John C. Polanyi. nσ* and πσ* excited states in aryl halide photochemistry: a comprehensive study of the UV photodissociation dynamics of iodobenzene. HX (X = Br, I) elimination from the highly internally excited C2H5X+ cation is deemed the most probable route to forming the C2H4 (+) fragment ions observed from both cations. it in a third party non-RSC publication you must JO - Physical Chemistry Chemical Physics, JF - Physical Chemistry Chemical Physics. * By SH Gardiner, TN Karsili, ML Lipciuc, E Wilman, MN Ashfold and C Vallance. The experimental studies are complemented by spin-orbit resolved ab initio calculations of cuts through the potential energy surfaces (along the RC-Br/I stretch coordinate) for the ground and first few excited states of the respective cations. Time-of-flight mass spectra and velocity-map images have been acquired for all fragment ions and for ground (Br) and spin-orbit excited (Br*) bromine atom products, allowing multiple fragmentation pathways to be investigated. This is a nucleophilic substitution mechanism of a cyanide (CN –) ion.This mechanism occurs when potassium cyanide (KCN) is added to a warmed haloalkane (in this case ethyl bromide, though any haloalkane can be used). Photoreaction dynamics of CH3I multilayers on GaAs(110): REMPI probing of the CH3 umbrella mode. This article is cited by USA.gov. Find more information about Crossref citation counts. Copyright © 2020 Elsevier B.V. or its licensors or contributors. Please enable it to take advantage of the complete set of features! Sara H. Gardiner, Tolga N. V. Karsili, M. Laura Lipciuc, Edward Wilman, Michael N. R. Ashfold, Claire Vallance*, Research output: Contribution to journal › Article (Academic Journal). Phys. The observed C2H3+ + H-2 + Br product channel is thought to arise via unimolecular decay of highly internally excited C2H5+ products formed following radiationless transfer from the initial excited state populated by photon absorption. HX (X = Br, I) elimination from the highly internally excited C2H5X(+) cation is deemed the most probable route to forming the C2H4(+) fragment ions observed from both cations. The Journal of Physical Chemistry A 2010 , 114 (20) , … Ethyl halide cations were formed through vacuum ultraviolet (VUV) photoionization of the respective neutral parent molecules at 118.2 nm, and were photolysed at a number of ultraviolet (UV) photolysis wavelengths, including 355 nm and wavelengths in the range from 236 to 266 nm. After photoinduced C−Br bond cleavage two channels for ethyl fragments ejected are observed in the TOF:  one resulting from direct ejection along the C−Br bond with a kinetic energy that varies from 0.6 to 1.1 eV, depending upon incident excitation wavelength, and the other, resulting from transient scattering from the surface potential energy well with a kinetic energy of 0.4 eV. to reproduce figures, diagrams etc. Finally, both ethyl halide cations also show evidence of a minor C-C bond fission process to form CH2X+ + CH3 products. N2 - The photodissociation dynamics of ethyl bromide and ethyl iodide cations (C2H5Br+ and C2H5I+) have been studied. Near-UV photolysis of substituted phenols, I: 4-fluoro-, 4-chloro- and 4-bromophenol. the whole article in a third party publication with the exception of reproduction Yarmoff, R.M. and Jisc. Modification of the surface termination of GaAs(001) using photon-activated electron-transfer reactions. Corresponding authors, a Cite . The TOF measurements also indicate that, at coverages of <1 ML, the C2H5Br is oriented with the C−Br bond at an angle near 30° from the surface normal in the [01̄] direction. Fragmentation dynamics of the ethyl bromide and ethyl iodide cations: a velocity-map imaging study Sara H. Gardinera, Tolga N.V. Karsilib, M. Laura Lipciuc a, Edward Wilman , Michael N.R. Finally, both ethyl halide cations also show evidence of a minor C-C bond fission process to form CH2X+ + CH3 products. J Chem Phys. Time-offlight mass spectra and velocity-map images have been acquired for all fragment ions and for ground (Br) and spin-orbit excited (Br*) bromine atom products, allowing multiple fragmentation pathways to be investigated. Ethyl halide cations were formed through vacuum ultraviolet (VUV) photoionization of the respective neutral parent molecules at 118.2 nm, and were photolysed at a number of ultraviolet (UV) photolysis wavelengths, including 355 nm and wavelengths in the range from 236 to 266 nm.

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