{"id":120,"date":"2024-11-16T16:53:22","date_gmt":"2024-11-16T15:53:22","guid":{"rendered":"https:\/\/pandora.anorg.chemie.uni-frankfurt.de\/?page_id=120"},"modified":"2025-09-22T14:12:15","modified_gmt":"2025-09-22T13:12:15","slug":"main-group-chemistry","status":"publish","type":"page","link":"https:\/\/holthausen.anorg.chemie.uni-frankfurt.de\/index.php\/main-group-chemistry\/","title":{"rendered":"Main Group Chemistry"},"content":{"rendered":"\n
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Redox\u2010Active N\u2010Heterocyclic Germylenes and Stannylenes with a Ferrocene\u20101,1\u2032\u2010diyl Backbone<\/h5>\n\n\n\n

Be positive, tetrylene!<\/strong> N\u2010heterocyclic germylenes and stannylenes with a ferrocenylene backbone are described, which are the first examples of redox\u2010functionalised N\u2010heterocyclic terylenes (see figure). Consistent with the strongly localised nature of the HOMO, the oxidation process is ferrocene based. The ferrocenium\u2010type nature of the resulting cation does not compromise the fundamental tetrylene character of these species, thus opening the door to a reversible umpolung of their electronic profile by redox switching.<\/p>\n\n\n\n

Chem. Eur. J.<\/em> 23, 1187\u20131199 (2017<\/strong>)<\/a><\/p>\n\n\n\n

in cooperation with Prof. Siemeling (Kassel)<\/em><\/p>\n<\/div>

\"\"<\/figure><\/div>\n\n\n\n
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Reversible Dihydrogen Activation by Reduced Aryl Boranes as Main-Group Ambiphiles<\/h5>\n\n\n\n

Borane metamorphosis:<\/strong> The injection of two electrons transformed the ditopic Lewis acid diboraanthracene into a main-group ambiphile (MGA) that activated H2<\/sub> much as a transition metal would. The H2<\/sub> molecule underwent selective addition across the two boron atoms, and the resulting hydridoborate could be used as a hydride-transfer reagent. <\/p>\n\n\n\n

Angew. Chem. Int. Ed.<\/em> 55, 14067\u201314071 (2016<\/strong>)<\/a><\/p>\n\n\n\n

in cooperation with Prof. Wagner (Frankfurt)<\/em><\/p>\n<\/div>

\"\"<\/figure><\/div>\n<\/div>\n\n\n\n
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Confirmed by X-ray crystallography: The B\u2022B one-electron \u03c3 bond<\/h5>\n\n\n\n

One is enough<\/strong>: The first structurally characterized radical anion containing a B\u22c5B one-electron \u03c3 bond shows a significantly shorter B\u22c5\u22c5\u22c5B distance than the uncharged starting material, while the boron centers largely maintain their local planarity.<\/p>\n\n\n\n

Angew. Chem. Int. Ed.\u00a0<\/em>53, 4832\u20134835 (2014<\/strong>)<\/a>;\u00a0Highlighted as “Very Important Paper”<\/mark><\/p>\n\n\n\n

in cooperation with Prof. Wagner (Frankfurt)<\/em><\/p>\n<\/div>

\"\"<\/figure><\/div>\n\n\n\n
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Diastereoselective synthesis of a bicyclic \u03b2-lactam with penicillin G-like spectrum of activity by carbonylation of an acyclic diaminocarbene<\/h5>\n\n\n\n

Diisopropylamino-cis-2,6-dimethylpiperidinocarbene reacts regio- and diastereoselectively with CO to afford a bicyclic \u03b2-lactam with 100% atom efficiency, whose spectrum of activity resembles that of penicillin G or amoxicillin. <\/p>\n\n\n\n

Chem. Commun. <\/em>50, 2341\u20132343 (2014<\/strong>)<\/a><\/p>\n\n\n\n

in cooperation with Prof. Siemeling (Kassel), Prof. Bandow (Bochum), and Prof. Schneider (Bonn)<\/em><\/p>\n<\/div>

\"\"<\/figure><\/div>\n","protected":false},"excerpt":{"rendered":"

Redox\u2010Active N\u2010Heterocyclic Germylenes and Stannylenes with a Ferrocene\u20101,1\u2032\u2010diyl Backbone Be positive, tetrylene! N\u2010heterocyclic germylenes and stannylenes with a ferrocenylene backbone are described, which are the first examples of redox\u2010functionalised N\u2010heterocyclic terylenes (see figure). Consistent with the strongly localised nature of the HOMO, the oxidation process is ferrocene based. The ferrocenium\u2010type nature…<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-120","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/holthausen.anorg.chemie.uni-frankfurt.de\/index.php\/wp-json\/wp\/v2\/pages\/120","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/holthausen.anorg.chemie.uni-frankfurt.de\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/holthausen.anorg.chemie.uni-frankfurt.de\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/holthausen.anorg.chemie.uni-frankfurt.de\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/holthausen.anorg.chemie.uni-frankfurt.de\/index.php\/wp-json\/wp\/v2\/comments?post=120"}],"version-history":[{"count":17,"href":"https:\/\/holthausen.anorg.chemie.uni-frankfurt.de\/index.php\/wp-json\/wp\/v2\/pages\/120\/revisions"}],"predecessor-version":[{"id":652,"href":"https:\/\/holthausen.anorg.chemie.uni-frankfurt.de\/index.php\/wp-json\/wp\/v2\/pages\/120\/revisions\/652"}],"wp:attachment":[{"href":"https:\/\/holthausen.anorg.chemie.uni-frankfurt.de\/index.php\/wp-json\/wp\/v2\/media?parent=120"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}