{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,24]],"date-time":"2026-04-24T11:12:41Z","timestamp":1777029161967,"version":"3.51.4"},"reference-count":122,"publisher":"Wiley","issue":"27","license":[{"start":{"date-parts":[[2013,5,15]],"date-time":"2013-05-15T00:00:00Z","timestamp":1368576000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Chemistry A European J"],"published-print":{"date-parts":[[2013,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The development of novel Br\u00f8nsted acids featuring the hexacoordinate phosphorus(V) anion [TRISPHAT]<jats:sup>\u2212<\/jats:sup> {[<jats:bold>1<\/jats:bold>]<jats:sup>\u2212<\/jats:sup>=[P(1,2\u2010O<jats:sub>2<\/jats:sub>C<jats:sub>6<\/jats:sub>Cl<jats:sub>4<\/jats:sub>)<jats:sub>3<\/jats:sub>]<jats:sup>\u2212<\/jats:sup>} are reported. The title compound, H(OEt<jats:sub>2<\/jats:sub>)<jats:sub>2<\/jats:sub>[<jats:bold>1<\/jats:bold>], was synthesized from 1,2\u2010(HO)<jats:sub>2<\/jats:sub>C<jats:sub>6<\/jats:sub>Cl<jats:sub>4<\/jats:sub> (3\u2005equiv) and PCl<jats:sub>5<\/jats:sub> in the presence of diethyl ether. This compound was fully characterized by <jats:sup>1<\/jats:sup>H, <jats:sup>31<\/jats:sup>P and <jats:sup>13<\/jats:sup>C\u2005NMR spectroscopy, X\u2010ray crystallography and elemental microanalysis. Dissolution of H(OEt<jats:sub>2<\/jats:sub>)<jats:sub>2<\/jats:sub>[<jats:bold>1<\/jats:bold>] in acetonitrile results in the slow precipitation of crystalline H(OEt<jats:sub>2<\/jats:sub>)(NCMe)[<jats:bold>1<\/jats:bold>], which was characterized by X\u2010ray diffraction; however, in CD<jats:sub>2<\/jats:sub>Cl<jats:sub>2<\/jats:sub> solution the [TRISPHAT]<jats:sup>\u2212<\/jats:sup> anion protonated and ring\u2010opened. The weighable, solid H(OEt<jats:sub>2<\/jats:sub>)<jats:sub>2<\/jats:sub> [<jats:bold>1<\/jats:bold>] was found to be a competent initiator for the polymerization of <jats:italic>n<\/jats:italic>\u2010butyl vinyl ether, \u03b1\u2010methylstyrene, styrene and isoprene at a variety of temperatures and monomer\u2010to\u2010initiator ratios. At low temperatures, polymers with <jats:italic>M<\/jats:italic><jats:sub>n<\/jats:sub>&gt;10<jats:sup>5<\/jats:sup> were obtained for <jats:italic>n<\/jats:italic>\u2010butyl vinyl ether and \u03b1\u2010methylstyrene whereas slightly lower molecular weights were obtained with styrene and isoprene (10<jats:sup>4<\/jats:sup>&lt;<jats:italic>M<\/jats:italic><jats:sub>n<\/jats:sub>&lt;10<jats:sup>5<\/jats:sup>). The poly(\u03b1\u2010methylstyrene) synthesized at \u221278\u2009\u00b0C is syndiotactic\u2010rich (ca. 87\u2009% <jats:italic>rr<\/jats:italic>) whereas the polystyrene obtained at \u221250\u2009\u00b0C is atactic. The polyisoprene obtained possessed all possible modes of enchainment as well as branched and\/or cyclic structures that are often observed in polyisoprene.<\/jats:p>","DOI":"10.1002\/chem.201204288","type":"journal-article","created":{"date-parts":[[2013,5,15]],"date-time":"2013-05-15T16:30:56Z","timestamp":1368635456000},"page":"9005-9014","source":"Crossref","is-referenced-by-count":25,"title":["H(OEt<sub>2<\/sub>)<sub>2<\/sub>[P(1,2\u2010O<sub>2<\/sub>C<sub>6<\/sub>Cl<sub>4<\/sub>)<sub>3<\/sub>]: Synthesis, Characterization, and Application as a Single\u2010Component Initiator for the Carbocationic Polymerization of Olefins"],"prefix":"10.1002","volume":"19","author":[{"given":"Paul W.","family":"Siu","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Khatera","family":"Hazin","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Derek P.","family":"Gates","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2013,5,15]]},"reference":[{"key":"e_1_2_6_1_2","unstructured":"\u00a0"},{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1021\/ar900159e"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.ccr.2005.10.023"},{"key":"e_1_2_6_4_2","doi-asserted-by":"publisher","DOI":"10.1002\/ange.200300620"},{"key":"e_1_2_6_4_3","doi-asserted-by":"publisher","DOI":"10.1002\/anie.200300620"},{"key":"e_1_2_6_5_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr050548u"},{"key":"e_1_2_6_6_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr980462j"},{"key":"e_1_2_6_7_2","doi-asserted-by":"publisher","DOI":"10.1021\/ar970230r"},{"key":"e_1_2_6_8_2","doi-asserted-by":"publisher","DOI":"10.1039\/cs9972600345"},{"key":"e_1_2_6_9_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr00019a005"},{"key":"e_1_2_6_10_2","unstructured":"For reviews see:"},{"key":"e_1_2_6_11_2","doi-asserted-by":"publisher","DOI":"10.1021\/ar100044s"},{"key":"e_1_2_6_12_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr900225g"},{"key":"e_1_2_6_13_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.progpolymsci.2007.01.001"},{"key":"e_1_2_6_14_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr990252m"},{"key":"e_1_2_6_15_2","volume-title":"Cationic Polymerization: Fundamentals and Applications","year":"1997"},{"key":"e_1_2_6_16_2","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1099-0518(19970130)35:2<329::AID-POLA16>3.0.CO;2-R"},{"key":"e_1_2_6_17_2","volume-title":"Cationic Polymerizations","year":"1996"},{"key":"e_1_2_6_18_2","doi-asserted-by":"publisher","DOI":"10.1016\/0079-6700(91)90008-9"},{"key":"e_1_2_6_19_2","volume-title":"Carbocationic Polymerization","author":"Kennedy J. 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Curr. 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