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Novel, well\u2010defined tin\u2010containing molecular precursors, so\u2010called twin monomers, were synthesized by transesterification starting from Sn(OR)<jats:sub>4<\/jats:sub> (R=<jats:italic>t<\/jats:italic>Bu, <jats:italic>t<\/jats:italic>Am) to give Sn(OCH<jats:sub>2<\/jats:sub>C<jats:sub>4<\/jats:sub>H<jats:sub>3<\/jats:sub>O)<jats:sub>4<\/jats:sub> (<jats:bold>1<\/jats:bold>), [Sn(OCH<jats:sub>2<\/jats:sub>C<jats:sub>4<\/jats:sub>H<jats:sub>3<\/jats:sub>S)<jats:sub>4<\/jats:sub><jats:bold>\u22c5<\/jats:bold>HOCH<jats:sub>2<\/jats:sub>C<jats:sub>4<\/jats:sub>H<jats:sub>3<\/jats:sub>S]<jats:sub>2<\/jats:sub> (<jats:bold>2<\/jats:bold>), [Sn(OCH<jats:sub>2<\/jats:sub>\u20102\u2010OCH<jats:sub>3<\/jats:sub>C<jats:sub>6<\/jats:sub>H<jats:sub>4<\/jats:sub>)<jats:sub>4<\/jats:sub><jats:bold>\u22c5<\/jats:bold>HOCH<jats:sub>2<\/jats:sub>\u20102\u2010OCH<jats:sub>3<\/jats:sub>C<jats:sub>6<\/jats:sub>H<jats:sub>4<\/jats:sub>]<jats:sub>2<\/jats:sub> (<jats:bold>3<\/jats:bold>), [Sn(OCH<jats:sub>2<\/jats:sub>\u20102,4\u2010(OCH<jats:sub>3<\/jats:sub>)<jats:sub>2<\/jats:sub>C<jats:sub>6<\/jats:sub>H<jats:sub>3<\/jats:sub>)<jats:sub>4<\/jats:sub><jats:bold>\u22c5<\/jats:bold>HOCH<jats:sub>2<\/jats:sub>\u20102,4\u2010(OCH<jats:sub>3<\/jats:sub>)<jats:sub>2<\/jats:sub>C<jats:sub>6<\/jats:sub>H<jats:sub>3<\/jats:sub>]<jats:sub>2<\/jats:sub> (<jats:bold>4<\/jats:bold>), 2,2\u2032\u2010spirobi[4<jats:italic>H<\/jats:italic>\u20101,3,2\u2010benzodioxastannine] (<jats:bold>5<\/jats:bold>), 2,2\u2032\u2010spirobi[6\u2010methylbenzo(4<jats:italic>H<\/jats:italic>\u20101,3,2)\u2010dioxastannine] (<jats:bold>6<\/jats:bold>), and 2,2\u2032\u2010spirobi[6\u2010methoxybenzo(4<jats:italic>H<\/jats:italic>\u20101,3,2)dioxastannine] (<jats:bold>7<\/jats:bold>). <jats:sup>13<\/jats:sup>C and <jats:sup>119<\/jats:sup>Sn\u2005NMR spectroscopy in the solid state and in solution as well as IR spectroscopy and elemental analysis were used to characterize the tin alkoxides. The molecular structures of compounds\u2005<jats:bold>2<\/jats:bold> and <jats:bold>3<\/jats:bold> were determined by single\u2010crystal X\u2010ray diffraction analysis. The moisture sensitivity of the tin(IV) alkoxides was demonstrated by the formation of the tin oxocluster [Sn<jats:sub>3<\/jats:sub>(\u03bc<jats:sub>3<\/jats:sub>\u2010O)(\u03bc<jats:sub>2<\/jats:sub>\u2010OH)(\u03bc<jats:sub>2<\/jats:sub>\u2010OCH<jats:sub>2<\/jats:sub>C<jats:sub>4<\/jats:sub>H<jats:sub>3<\/jats:sub>S)<jats:sub>3<\/jats:sub>(OCH<jats:sub>2<\/jats:sub>C<jats:sub>4<\/jats:sub>H<jats:sub>3<\/jats:sub>S)<jats:sub>6<\/jats:sub>(HOCH<jats:sub>2<\/jats:sub>C<jats:sub>4<\/jats:sub>H<jats:sub>3<\/jats:sub>S)]<jats:sub>2<\/jats:sub> (<jats:bold>2\u2009a<\/jats:bold>), a hydrolysis product of compound\u2005<jats:bold>2<\/jats:bold>. Polymerization reactions in the melt (for <jats:bold>1<\/jats:bold> and <jats:bold>5<\/jats:bold>) and in solution (for <jats:bold>2<\/jats:bold>\u2013<jats:bold>4<\/jats:bold>) resulted in cross\u2010linked nanocomposites of the type polymer\/SnO<jats:sub>2<\/jats:sub>. Subsequent oxidation of the composites gave SnO<jats:sub>2<\/jats:sub> with BET surface areas up to 178\u2005m<jats:sup>2<\/jats:sup>\u2009g<jats:sup>\u22121<\/jats:sup>. Simultaneous twin polymerization of compounds\u2005<jats:bold>5<\/jats:bold>\u2013<jats:bold>7<\/jats:bold> with the silicon derivative 2,2\u2032\u2010spirobi[4<jats:italic>H<\/jats:italic>\u20101,3,2\u2010benzodioxasiline] resulted in the formation of polymer\/SnO<jats:sub>2<\/jats:sub>\/SiO<jats:sub>2<\/jats:sub> hybrid materials. Oxidation gave porous materials with SnO<jats:sub>2<\/jats:sub> nanoparticles embedded in a silica network with BET surface areas up to 378\u2005m<jats:sup>2<\/jats:sup>\u2009g<jats:sup>\u22121<\/jats:sup>. The silica acts as a crystal growth inhibitor, which prevents sintering of the SnO<jats:sub>2<\/jats:sub> nanoparticles 20\u201332\u2005nm in size.<\/jats:p>","DOI":"10.1002\/cplu.201200242","type":"journal-article","created":{"date-parts":[[2013,10,8]],"date-time":"2013-10-08T08:07:46Z","timestamp":1381219666000},"page":"1400-1412","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":30,"title":["Tin Oxide Nanoparticles and SnO<sub>2<\/sub>\/SiO<sub>2<\/sub> Hybrid Materials by Twin Polymerization Using Tin(IV) Alkoxides"],"prefix":"10.1002","volume":"78","author":[{"given":"Christian","family":"Leonhardt","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Susann","family":"Brumm","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Andreas","family":"Seifert","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gerhard","family":"Cox","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Arno","family":"Lange","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tobias","family":"R\u00fcffer","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dieter","family":"Schaarschmidt","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Heinrich","family":"Lang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nathanael","family":"J\u00f6hrmann","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michael","family":"Hietschold","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Frank","family":"Simon","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michael","family":"Mehring","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2013,9,19]]},"reference":[{"key":"e_1_2_6_1_2","doi-asserted-by":"publisher","DOI":"10.1063\/1.1849832"},{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1002\/sia.3223"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.1109\/TNANO.2010.2047728"},{"key":"e_1_2_6_4_2","doi-asserted-by":"publisher","DOI":"10.1002\/ppap.200732101"},{"key":"e_1_2_6_5_2","doi-asserted-by":"publisher","DOI":"10.1524\/teme.71.5.298.33114"},{"key":"e_1_2_6_6_2","doi-asserted-by":"publisher","DOI":"10.1088\/0957-0233\/4\/7\/001"},{"key":"e_1_2_6_7_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0039-9140(02)00124-8"},{"key":"e_1_2_6_8_2","doi-asserted-by":"publisher","DOI":"10.2109\/jcersj.104.409"},{"key":"e_1_2_6_9_2","volume-title":"Chemical and Biochemical Sensors, Vol.\u20052","author":"G\u00f6pel W.","year":"1991"},{"key":"e_1_2_6_10_2","doi-asserted-by":"publisher","DOI":"10.1016\/S1010-6030(02)00394-5"},{"key":"e_1_2_6_11_2","doi-asserted-by":"publisher","DOI":"10.1063\/1.352748"},{"key":"e_1_2_6_12_2","first-page":"58","volume":"324","author":"Frank G.","year":"1982","journal-title":"Proc. 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