ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectron-transfer catalyzed cis-trans isomerization of stilbene. Stability of sodium cis-stilbenide and the existence of sodium salts of cis- and ofu trans-stilbene dianionsG. Levin, T. A. Ward, and M. SzwarcCite this: J. Am. Chem. Soc. 1974, 96, 1, 270–272Publication Date (Print):January 1, 1974Publication History Published online1 May 2002Published inissue 1 January 1974https://pubs.acs.org/doi/10.1021/ja00808a055https://doi.org/10.1021/ja00808a055research-articleACS PublicationsRequest reuse permissionsArticle Views157Altmetric-Citations15LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
Abstract Die Elektronenübertragung von den dimeren Dianionen (I) auf das Benzopyren (II) in Tetrahydrofuran und Gegenwart von Natriumtetraphenylborat führt bei 25°C über die Bildung von Addukten, bei denen kovalente Bindungen zwischen den beiden Reaktionspartnern auftreten, zum Radikalanion des Benzopyrens (II).
Abstract The concepts of ion‐pairs, solvent separated ion‐pairs, and of higher agglomerates is reviewed. The conditions under wich these concepts are justified are outlined. Relations between conductance and the ion association is examined. The effect of solvents upon the association, the mobility of ions, their degree of solvation, etc. are discussed.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPoly(hexamethylphosphoramide) and Its CopolymerA. Bello, W. Bracke, J. Jagur-Grodzinski, G. Sackmann, and M. SzwarcCite this: Macromolecules 1970, 3, 1, 98–100Publication Date (Print):January 1, 1970Publication History Published online1 May 2002Published inissue 1 January 1970https://doi.org/10.1021/ma60013a021RIGHTS & PERMISSIONSArticle Views55Altmetric-Citations6LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (312 KB) Get e-Alerts Get e-Alerts
The kinetics of the thermal decomposition of di-t-butyl peroxide were studied in the presence of excess toluene using a static and a flow system, the temperature range being 120° to 280°C. The decomposition was represented by the following mechanism: (CH3)3C. O. O. C(CH3)3→2(CH3)3. CO·(CH3)3. CO·→CH3·+CH3. CO. CH3 2CH3·→C2H6CH3·+C6H5. CH3→CH4+C6H5. CH2·CH3·+C6H5. CH2·→C6H5. CH2. CH3The rate of reaction was measured by the rate of formation of CH4+C2H6. It was shown that the decomposition is a homogeneous gas reaction of the first order. The activation energy seems to be 36±1 kcal/mole, corresponding to the frequency factor of the order 4.1014−7.1014 sec−1. It was shown that the rate of reaction is not influenced by the pressure of toluene and by the toluene/peroxide ratio. It remains the same even in the extreme case when no toluene is present, or when benzene is used instead of toluene. The rates of decomposition obtained in this study are in fair agreement with the rates obtained for the same reaction by Rust and Vaughan. The following values have been obtained for dissociation energies: D[(CH3)3. CO–OC. (CH3)3]=36 kcal/moleD[(CH3)3. CO–H]=106 kcal/moleD[(CH3)3·CO–OH]=39 kcal/moleand the heat of formation of (CH3)3.CO· radical has been estimated at −23 kcal/mole.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectron transfer from dimeric dianions of .alpha.-methylstyrene to benzo[e]pyreneH. Tokunaga, Joseph Jagur-Grodzinski, and Michael SzwarcCite this: J. Phys. Chem. 1969, 73, 12, 4364–4366Publication Date (Print):December 1, 1969Publication History Published online1 May 2002Published inissue 1 December 1969https://pubs.acs.org/doi/10.1021/j100846a058https://doi.org/10.1021/j100846a058research-articleACS PublicationsRequest reuse permissionsArticle Views16Altmetric-Citations1LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access options Get e-Alerts
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