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Kinetic measurements on methylidyne radical reactions with several hydrocarbons at low temperatures
The temperature dependences of the methylidyne radical reactions with methane, allene, methylacetylene and propene were studied. This work was carried out in a supersonic flow reactor coupled with pulsed laser photolysis (PLP) and laser-induced fluorescence (LIF) techniques. Three Laval nozzles were...
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Published in: | Physical chemistry chemical physics : PCCP 2005-01, Vol.7 (15), p.2921-2927 |
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description | The temperature dependences of the methylidyne radical reactions with methane, allene, methylacetylene and propene were studied. This work was carried out in a supersonic flow reactor coupled with pulsed laser photolysis (PLP) and laser-induced fluorescence (LIF) techniques. Three Laval nozzles were designed to provide uniform supersonic expansions of nitrogen at Mach 2 and of argon at Mach 2 and 3 to reach low temperatures, e.g. 170, 128 and 77 K, respectively. CH radicals were produced by PLP of CHBr3 at 266 nm and probed by LIF. The exponential decays of the CH fluorescence were acquired, hydrocarbons being introduced in excess. The rate constants for the CH+CH4 reaction are in good agreement with the temperature dependence proposed by Canosa et al. (A. Canosa, I. R. Sims, D. Travers, I. W. M. Smith and B. R. Rowe, Astron. Astrophys., 1997, 323, 644-651, ) i.e. 3.96x10(-8)(T/K)(-1.04) exp(-36.1 K/T) in the range 23-298 K. The rate constants of the CH+C3H4(allene), CH+C3H4(methylacetylene) and CH+C3H6(propene) reactions exhibit a small temperature dependence between 77 and 170 K, with a maximum rate around 100 K close to (4.3-4.6)x10(-10) cm3 molecule-1 s-1. |
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The rate constants of the CH+C3H4(allene), CH+C3H4(methylacetylene) and CH+C3H6(propene) reactions exhibit a small temperature dependence between 77 and 170 K, with a maximum rate around 100 K close to (4.3-4.6)x10(-10) cm3 molecule-1 s-1.</description><identifier>ISSN: 1463-9076</identifier><identifier>EISSN: 1463-9084</identifier><identifier>DOI: 10.1039/b506096f</identifier><identifier>PMID: 16189612</identifier><language>eng</language><publisher>Cambridge: Royal Society of Chemistry</publisher><subject>Alkadienes - chemistry ; Alkenes - chemistry ; Alkynes - chemistry ; Argon - chemistry ; Chemical Sciences ; Chemistry ; Cold Temperature ; Exact sciences and technology ; Free Radicals - chemistry ; General and physical chemistry ; Hydrocarbons - chemistry ; Hydrocarbons, Brominated - chemistry ; Kinetics ; Lasers ; Methane - chemistry ; Nitrogen - chemistry ; or physical chemistry ; Photochemistry ; Photolysis ; Physical chemistry of induced reactions (with radiations, particles and ultrasonics) ; Spectrometry, Fluorescence ; Temperature ; Theoretical and</subject><ispartof>Physical chemistry chemical physics : PCCP, 2005-01, Vol.7 (15), p.2921-2927</ispartof><rights>2005 INIST-CNRS</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c365t-5391c74ee19990114dbda68613df31cdbf636838fc0701ede28488f9376a86943</citedby><cites>FETCH-LOGICAL-c365t-5391c74ee19990114dbda68613df31cdbf636838fc0701ede28488f9376a86943</cites><orcidid>0000-0002-6455-9458 ; 0000-0002-3961-5710</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,780,784,885,27923,27924</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=17020910$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/16189612$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink><backlink>$$Uhttps://hal.science/hal-00108712$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>DAUGEY, Nicolas</creatorcontrib><creatorcontrib>CAUBET, Philippe</creatorcontrib><creatorcontrib>RETAIL, Bertrand</creatorcontrib><creatorcontrib>COSTES, Michel</creatorcontrib><creatorcontrib>BERGEAT, Astrid</creatorcontrib><creatorcontrib>DORTHE, Gérard</creatorcontrib><title>Kinetic measurements on methylidyne radical reactions with several hydrocarbons at low temperatures</title><title>Physical chemistry chemical physics : PCCP</title><addtitle>Phys Chem Chem Phys</addtitle><description>The temperature dependences of the methylidyne radical reactions with methane, allene, methylacetylene and propene were studied. This work was carried out in a supersonic flow reactor coupled with pulsed laser photolysis (PLP) and laser-induced fluorescence (LIF) techniques. Three Laval nozzles were designed to provide uniform supersonic expansions of nitrogen at Mach 2 and of argon at Mach 2 and 3 to reach low temperatures, e.g. 170, 128 and 77 K, respectively. CH radicals were produced by PLP of CHBr3 at 266 nm and probed by LIF. The exponential decays of the CH fluorescence were acquired, hydrocarbons being introduced in excess. The rate constants for the CH+CH4 reaction are in good agreement with the temperature dependence proposed by Canosa et al. (A. Canosa, I. R. Sims, D. Travers, I. W. M. Smith and B. R. Rowe, Astron. Astrophys., 1997, 323, 644-651, ) i.e. 3.96x10(-8)(T/K)(-1.04) exp(-36.1 K/T) in the range 23-298 K. The rate constants of the CH+C3H4(allene), CH+C3H4(methylacetylene) and CH+C3H6(propene) reactions exhibit a small temperature dependence between 77 and 170 K, with a maximum rate around 100 K close to (4.3-4.6)x10(-10) cm3 molecule-1 s-1.</description><subject>Alkadienes - chemistry</subject><subject>Alkenes - chemistry</subject><subject>Alkynes - chemistry</subject><subject>Argon - chemistry</subject><subject>Chemical Sciences</subject><subject>Chemistry</subject><subject>Cold Temperature</subject><subject>Exact sciences and technology</subject><subject>Free Radicals - chemistry</subject><subject>General and physical chemistry</subject><subject>Hydrocarbons - chemistry</subject><subject>Hydrocarbons, Brominated - chemistry</subject><subject>Kinetics</subject><subject>Lasers</subject><subject>Methane - chemistry</subject><subject>Nitrogen - chemistry</subject><subject>or physical chemistry</subject><subject>Photochemistry</subject><subject>Photolysis</subject><subject>Physical chemistry of induced reactions (with radiations, particles and ultrasonics)</subject><subject>Spectrometry, Fluorescence</subject><subject>Temperature</subject><subject>Theoretical and</subject><issn>1463-9076</issn><issn>1463-9084</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><recordid>eNpFkE1LAzEQhoMotlbBXyB7UfRQzWx2s8mxFLViwYuel2wySyP7UZO0pf_elNZ6mszMwzPkJeQa6CNQJp-qnHIqeX1ChpBxNpZUZKfHd8EH5ML7b0op5MDOyQA4CMkhHRL9bjsMVictKr9y2GIXfNJ3sQ-LbWPNtsPEKWO1ahKHSgfbdz7Z2LBIPK7RxfFia1yvlat2GxWSpt8kAdtlXIao9JfkrFaNx6tDHZGvl-fP6Ww8_3h9m07mY814HsY5k6CLDBGklBQgM5VRXHBgpmagTVVzxgUTtaYFBTSYikyIWrKCK8FlxkbkYe9dqKZcOtsqty17ZcvZZF7uZvH_VBSQriGyd3t26fqfFfpQttZrbBrVYb_yZbybFmmeRvB-D2rXe--wPpqBlrvwy7_wI3pzcK6qFs0_eEg7ArcHQPmYZ-1Up63_5wqaUhmdv5bHjB8</recordid><startdate>20050101</startdate><enddate>20050101</enddate><creator>DAUGEY, Nicolas</creator><creator>CAUBET, Philippe</creator><creator>RETAIL, Bertrand</creator><creator>COSTES, Michel</creator><creator>BERGEAT, Astrid</creator><creator>DORTHE, Gérard</creator><general>Royal Society of Chemistry</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>1XC</scope><orcidid>https://orcid.org/0000-0002-6455-9458</orcidid><orcidid>https://orcid.org/0000-0002-3961-5710</orcidid></search><sort><creationdate>20050101</creationdate><title>Kinetic measurements on methylidyne radical reactions with several hydrocarbons at low temperatures</title><author>DAUGEY, Nicolas ; 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This work was carried out in a supersonic flow reactor coupled with pulsed laser photolysis (PLP) and laser-induced fluorescence (LIF) techniques. Three Laval nozzles were designed to provide uniform supersonic expansions of nitrogen at Mach 2 and of argon at Mach 2 and 3 to reach low temperatures, e.g. 170, 128 and 77 K, respectively. CH radicals were produced by PLP of CHBr3 at 266 nm and probed by LIF. The exponential decays of the CH fluorescence were acquired, hydrocarbons being introduced in excess. The rate constants for the CH+CH4 reaction are in good agreement with the temperature dependence proposed by Canosa et al. (A. Canosa, I. R. Sims, D. Travers, I. W. M. Smith and B. R. Rowe, Astron. Astrophys., 1997, 323, 644-651, ) i.e. 3.96x10(-8)(T/K)(-1.04) exp(-36.1 K/T) in the range 23-298 K. The rate constants of the CH+C3H4(allene), CH+C3H4(methylacetylene) and CH+C3H6(propene) reactions exhibit a small temperature dependence between 77 and 170 K, with a maximum rate around 100 K close to (4.3-4.6)x10(-10) cm3 molecule-1 s-1.</abstract><cop>Cambridge</cop><pub>Royal Society of Chemistry</pub><pmid>16189612</pmid><doi>10.1039/b506096f</doi><tpages>7</tpages><orcidid>https://orcid.org/0000-0002-6455-9458</orcidid><orcidid>https://orcid.org/0000-0002-3961-5710</orcidid></addata></record> |
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subjects | Alkadienes - chemistry Alkenes - chemistry Alkynes - chemistry Argon - chemistry Chemical Sciences Chemistry Cold Temperature Exact sciences and technology Free Radicals - chemistry General and physical chemistry Hydrocarbons - chemistry Hydrocarbons, Brominated - chemistry Kinetics Lasers Methane - chemistry Nitrogen - chemistry or physical chemistry Photochemistry Photolysis Physical chemistry of induced reactions (with radiations, particles and ultrasonics) Spectrometry, Fluorescence Temperature Theoretical and |
title | Kinetic measurements on methylidyne radical reactions with several hydrocarbons at low temperatures |
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