Effect of stannous octoate on the thermal decomposition of 2,2′‐azobis(isobutyronitrile)
Identifieur interne : 000E39 ( Istex/Corpus ); précédent : 000E38; suivant : 000E40Effect of stannous octoate on the thermal decomposition of 2,2′‐azobis(isobutyronitrile)
Auteurs : Mohamed Tahar Tabka ; Jean-Marc Chenal ; Jean-Michel WidmaierSource :
- Polymer International [ 0959-8103 ] ; 2000-04.
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Abstract
The thermal decomposition rate constant kd of 2,2′‐azobis(isobutyronitrile) (AIBN) in ethyl acetate was determined at 60 °C in the presence of various amounts of stannous octoate (SnOc2). The kd values were found to be dependent on the concentration of SnOc2 in the solution. This dependence is not a linear function of the concentration because kd goes through a maximum when [SnOc2]/[AIBN] = 1. These features were explained by assuming the formation of a 1:1 cyclic complex between the nitrile groups of AIBN and the tin atom of SnOc2. This complex induces steric constraints in the azo bond of AIBN, thus increasing its rate of decomposition. © 2000 Society of Chemical Industry
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DOI: 10.1002/(SICI)1097-0126(200004)49:4<412::AID-PI395>3.0.CO;2-J
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The kd values were found to be dependent on the concentration of SnOc2 in the solution. This dependence is not a linear function of the concentration because kd goes through a maximum when [SnOc2]/[AIBN] = 1. These features were explained by assuming the formation of a 1:1 cyclic complex between the nitrile groups of AIBN and the tin atom of SnOc2. This complex induces steric constraints in the azo bond of AIBN, thus increasing its rate of decomposition. © 2000 Society of Chemical Industry</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>Mohamed Tahar Tabka</name><affiliations><json:string>Institut Charles Sadron (CNRS‐ULP), UPR 0022, 6 rue Boussingault, 67083 Strasbourg Cedex, France</json:string><json:string>Current Address: Institut Préparatoire aux Etudes d'Ingénieur de Nabeul, Université de Tunis II, Campus Universitaire Merazka, 8000 Nabeul, Tunisia</json:string></affiliations></json:item><json:item><name>Jean‐Marc Chenal</name><affiliations><json:string>Institut Charles Sadron (CNRS‐ULP), UPR 0022, 6 rue Boussingault, 67083 Strasbourg Cedex, France</json:string></affiliations></json:item><json:item><name>Jean‐Michel Widmaier</name><affiliations><json:string>Institut Charles Sadron (CNRS‐ULP), UPR 0022, 6 rue Boussingault, 67083 Strasbourg Cedex, France</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>free‐radical initiator</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>thermal decomposition</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>organometallics</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>complexation</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>AIBN</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>stannous octoate</value></json:item></subject><articleId><json:string>PI395</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>article</json:string></originalGenre><abstract>The thermal decomposition rate constant kd of 2,2′‐azobis(isobutyronitrile) (AIBN) in ethyl acetate was determined at 60 °C in the presence of various amounts of stannous octoate (SnOc2). The kd values were found to be dependent on the concentration of SnOc2 in the solution. This dependence is not a linear function of the concentration because kd goes through a maximum when [SnOc2]/[AIBN] = 1. These features were explained by assuming the formation of a 1:1 cyclic complex between the nitrile groups of AIBN and the tin atom of SnOc2. 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The kd values were found to be dependent on the concentration of SnOc2 in the solution. This dependence is not a linear function of the concentration because kd goes through a maximum when [SnOc2]/[AIBN] = 1. These features were explained by assuming the formation of a 1:1 cyclic complex between the nitrile groups of AIBN and the tin atom of SnOc2. 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The <i>k</i><sub>d</sub> values were found to be dependent on the concentration of SnOc<sub>2</sub> in the solution. This dependence is not a linear function of the concentration because <i>k</i><sub>d</sub> goes through a maximum when [SnOc<sub>2</sub>]/[AIBN] = 1. These features were explained by assuming the formation of a 1:1 cyclic complex between the nitrile groups of AIBN and the tin atom of SnOc<sub>2</sub>. This complex induces steric constraints in the azo bond of AIBN, thus increasing its rate of decomposition.</p><p>© 2000 Society of Chemical Industry</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Effect of stannous octoate on the thermal decomposition of 2,2′‐azobis(isobutyronitrile)</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Thermal decomposition of 2,2′‐azobis(isobutyronitrile)</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Effect of stannous octoate on the thermal decomposition of 2,2′‐azobis(isobutyronitrile)</title></titleInfo><name type="personal"><namePart type="given">Mohamed Tahar</namePart><namePart type="family">Tabka</namePart><affiliation>Institut Charles Sadron (CNRS‐ULP), UPR 0022, 6 rue Boussingault, 67083 Strasbourg Cedex, France</affiliation><affiliation>Current Address: Institut Préparatoire aux Etudes d'Ingénieur de Nabeul, Université de Tunis II, Campus Universitaire Merazka, 8000 Nabeul, Tunisia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Jean‐Marc</namePart><namePart type="family">Chenal</namePart><affiliation>Institut Charles Sadron (CNRS‐ULP), UPR 0022, 6 rue Boussingault, 67083 Strasbourg Cedex, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Jean‐Michel</namePart><namePart type="family">Widmaier</namePart><affiliation>Institut Charles Sadron (CNRS‐ULP), UPR 0022, 6 rue Boussingault, 67083 Strasbourg Cedex, France</affiliation><description>Correspondence: Institut Charles Sadron (CNRS‐ULP), UPR 0022, 6 rue Boussingault, 67083 Strasbourg Cedex, France</description><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>John Wiley & Sons, Ltd.</publisher><place><placeTerm type="text">Chichester, UK</placeTerm></place><dateIssued encoding="w3cdtf">2000-04</dateIssued><dateCaptured encoding="w3cdtf">1999-08-31</dateCaptured><dateValid encoding="w3cdtf">1999-12-16</dateValid><copyrightDate encoding="w3cdtf">2000</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">3</extent><extent unit="tables">2</extent><extent unit="references">35</extent></physicalDescription><abstract lang="en">The thermal decomposition rate constant kd of 2,2′‐azobis(isobutyronitrile) (AIBN) in ethyl acetate was determined at 60 °C in the presence of various amounts of stannous octoate (SnOc2). The kd values were found to be dependent on the concentration of SnOc2 in the solution. This dependence is not a linear function of the concentration because kd goes through a maximum when [SnOc2]/[AIBN] = 1. These features were explained by assuming the formation of a 1:1 cyclic complex between the nitrile groups of AIBN and the tin atom of SnOc2. This complex induces steric constraints in the azo bond of AIBN, thus increasing its rate of decomposition. © 2000 Society of Chemical Industry</abstract><subject lang="en"><genre>keywords</genre><topic>free‐radical initiator</topic><topic>thermal decomposition</topic><topic>organometallics</topic><topic>complexation</topic><topic>AIBN</topic><topic>stannous octoate</topic></subject><relatedItem type="host"><titleInfo><title>Polymer International</title></titleInfo><titleInfo type="abbreviated"><title>Polym. 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|texte= Effect of stannous octoate on the thermal decomposition of 2,2′‐azobis(isobutyronitrile)
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