{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,13]],"date-time":"2025-10-13T00:54:38Z","timestamp":1760316878634,"version":"build-2065373602"},"reference-count":92,"publisher":"Wiley","issue":"40","license":[{"start":{"date-parts":[[2013,8,14]],"date-time":"2013-08-14T00:00:00Z","timestamp":1376438400000},"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":[[2013,9,27]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The enantiomerically pure dibromoferrocene <jats:bold>3<\/jats:bold> [(<jats:italic>S<jats:sub>p<\/jats:sub><\/jats:italic>,<jats:italic>S<jats:sub>p<\/jats:sub><\/jats:italic>)\u20101,1\u2032\u2010dibromo\u20102,2\u2032\u2010di(isopropyl)ferrocene], equipped with two <jats:italic>i<\/jats:italic>Pr groups in \u03b1\u2005positions, was prepared using known \u201cUgi amine\u201d chemistry. Species <jats:bold>3<\/jats:bold> was targeted in order to gain access to new [1]ferrocenophanes ([1]FCPs) to be used as monomers for ring\u2010opening polymerization. The <jats:italic>i<\/jats:italic>Pr groups on the sandwich unit were introduced to stabilize bridging moieties, as well as to increase solubilities of targeted metallopolymers. The planar chiral dibromide <jats:bold>3<\/jats:bold> can quantitatively be lithiated at 0\u2009\u00b0C [2\u2005equiv <jats:italic>n<\/jats:italic>BuLi, hexanes\/thf (9:1), 30\u2005min]. Salt\u2010metathesis reactions with respective element dichloride species gave chiral [1]FCPs with a variety of bridging moieties [ER<jats:sub><jats:italic>x<\/jats:italic><\/jats:sub>=Ga[2\u2010(Me<jats:sub>2<\/jats:sub>NCH<jats:sub>2<\/jats:sub>)C<jats:sub>6<\/jats:sub>H<jats:sub>4<\/jats:sub>] (<jats:bold>4\u2009a<\/jats:bold>), SiMe<jats:sub>2<\/jats:sub> (<jats:bold>4\u2009b<\/jats:bold>), Sn<jats:italic>t<\/jats:italic>Bu<jats:sub>2<\/jats:sub> (<jats:bold>4\u2009c<\/jats:bold>), BN<jats:italic>i<\/jats:italic>Pr<jats:sub>2<\/jats:sub> (<jats:bold>4\u2009d<\/jats:bold>)]. The new [1]FCPs were fully characterized including single\u2010crystal X\u2010ray analysis. The stabilizing <jats:italic>i<\/jats:italic>Pr groups on the Cp rings increase the thermal stabilities of <jats:bold>4\u2009b<\/jats:bold>\u2013<jats:bold>d<\/jats:bold> compared to known [1]FCPs, equipped with the same bridging moieties. All three compounds <jats:bold>4\u2009b<\/jats:bold>\u2013<jats:bold>d<\/jats:bold> are volatile and could be isolated by vacuum sublimation. Our new approach to [1]FCPs has the potential to overcome many of the existing difficulties in ferrocenophane chemistry, such as limited stability of starting monomers and low solubilities of resulting polyferrocenes.<\/jats:p>","DOI":"10.1002\/chem.201301991","type":"journal-article","created":{"date-parts":[[2013,8,15]],"date-time":"2013-08-15T03:20:18Z","timestamp":1376536818000},"page":"13408-13417","source":"Crossref","is-referenced-by-count":30,"title":["A Flexible Approach to Strained Sandwich Compounds: Chiral [1]Ferrocenophanes with Boron, Gallium, Silicon, and Tin in Bridging 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