{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,14]],"date-time":"2025-10-14T01:18:14Z","timestamp":1760404694927,"version":"build-2065373602"},"reference-count":36,"publisher":"Wiley","issue":"16","license":[{"start":{"date-parts":[[2017,2,20]],"date-time":"2017-02-20T00:00:00Z","timestamp":1487548800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"Deutsche Forschungsgemeinschaft (DE)","award":["Cluster of Excellence \"Tailor-Made Fuels from Biomass\""],"award-info":[{"award-number":["Cluster of Excellence \"Tailor-Made Fuels from Biomass\""]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Chemistry A European J"],"published-print":{"date-parts":[[2017,3,17]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>A series of S<jats:sub>N<\/jats:sub>1\u2010type reactions has been studied under various conditions to clarify the role of supercritical carbon dioxide (scCO<jats:sub>2<\/jats:sub>) as reaction medium for this kind of transformations. The application of scCO<jats:sub>2<\/jats:sub> did not result in higher yields in any of the experiments in comparison to those under neat conditions or in the presence of other inert compressed gases. High\u2010pressure UV\/Vis spectroscopic measurements were carried out to quantify the degree of carbocation formation of a highly S<jats:sub>N<\/jats:sub>1\u2010active alkyl halide as a function of the applied solvent. No measureable concentration of carbocations could be detected in scCO<jats:sub>2<\/jats:sub>, just like in other low polarity solvents. Taken together, these results do not support the previously claimed activating effect via enhanced S<jats:sub>N<\/jats:sub>1 ionization due to the quadrupolar moment of the supercritical fluid.<\/jats:p>","DOI":"10.1002\/chem.201604151","type":"journal-article","created":{"date-parts":[[2017,2,20]],"date-time":"2017-02-20T03:38:58Z","timestamp":1487561938000},"page":"3898-3902","source":"Crossref","is-referenced-by-count":5,"title":["Concerning the Role of Supercritical Carbon Dioxide in S<sub>N<\/sub>1 Reactions"],"prefix":"10.1002","volume":"23","author":[{"given":"Yun X.","family":"Qiao","sequence":"first","affiliation":[{"name":"Max-Planck-Institut f\u00fcr Kohlenforschung  Kaiser-Wilhelm-Platz 1 45470 M\u00fclheim Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nils","family":"Theyssen","sequence":"additional","affiliation":[{"name":"Max-Planck-Institut f\u00fcr Kohlenforschung  Kaiser-Wilhelm-Platz 1 45470 M\u00fclheim 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University  Worringerweg 1 52074 Aachen Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Walter","family":"Leitner","sequence":"additional","affiliation":[{"name":"Max-Planck-Institut f\u00fcr Kohlenforschung  Kaiser-Wilhelm-Platz 1 45470 M\u00fclheim Germany"},{"name":"Institut f\u00fcr Technische und Makromolekulare Chemie RWTH Aachen University  Worringerweg 1 52074 Aachen Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Manfred T.","family":"Reetz","sequence":"additional","affiliation":[{"name":"Max-Planck-Institut f\u00fcr Kohlenforschung  Kaiser-Wilhelm-Platz 1 45470 M\u00fclheim Germany"},{"name":"Department of Chemistry Philipps-Universit\u00e4t Marburg  Hans-Meerwein-Stra\u00dfe 35032 Marburg Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2017,2,20]]},"reference":[{"key":"e_1_2_6_1_1","unstructured":"For recent reviews on the use of scCO2as reaction medium 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