Darstellung und Charakterisierung von gespannten [n]Metalloarenophanen und Borolen

Synthesis and Characterization of strained [n]Metalloarenophanes and Boroles

Please always quote using this URN: urn:nbn:de:bvb:20-opus-24999
  • Die Darstellung von gespannten ansa-Komplexen verschiedener Übergangsmetall-Sandwichverbindungen gelingt durch Umsetzung von dimetallierten Metallocenvorstufen mit den entsprechenden Elementdiahlogeniden. Die Ringspannung in diesen Systemen kann für eine ausgeprägte Folgereaktivität (Ringöffnungsreaktionen, ROP, Diborierung, Bis(silylierung), etc.) ausgenutzt werden. Kristallstrukturanalysen verschiedener Borol-Derivate belegen die hohe Lewis-Azidität des Borzentrums sowie den antiaromatischen Charakter dieser Verbindungsklasse.
  • The synthesis of strained [n]metalloarenophanes of several transition-metal sandwich complexes has been achieved by salt elimination reactions of dimetalated metallocene precursors with the appropriate element dihalides. The molecular ring strain in these sytems is accompanied by an enhanced reactivity (ring-opening reactions, ROP, diboration, bis(silylation), etc.). X-ray diffraction studies of several borole derivatives have proven the extraordinarily high Lewis acidity of the boron center, as well as the antiaromatic character of theseThe synthesis of strained [n]metalloarenophanes of several transition-metal sandwich complexes has been achieved by salt elimination reactions of dimetalated metallocene precursors with the appropriate element dihalides. The molecular ring strain in these sytems is accompanied by an enhanced reactivity (ring-opening reactions, ROP, diboration, bis(silylation), etc.). X-ray diffraction studies of several borole derivatives have proven the extraordinarily high Lewis acidity of the boron center, as well as the antiaromatic character of these heterocycles.show moreshow less

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Metadaten
Author: Thomas Kupfer
URN:urn:nbn:de:bvb:20-opus-24999
Document Type:Doctoral Thesis
Granting Institution:Universität Würzburg, Fakultät für Chemie und Pharmazie
Faculties:Fakultät für Chemie und Pharmazie / Institut für Anorganische Chemie
Date of final exam:2007/10/29
Language:German
Year of Completion:2007
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften
GND Keyword:Antiaromatizität; Borierung; Borole; Metallocene; Ringspannung; Ringöffnungspolymerisation; Silylierung
Tag:DFT; Metalloarenophane; ROP; ansa-Komplexe
Antiaromaticity; Borole; Metalloarenophanes; ROP
Release Date:2007/11/15
Advisor:Prof. Dr. Holger Braunschweig