• Medientyp: E-Artikel
  • Titel: Derivate des Imidazols, XIX. Koordination oder Reduktion? Zur Reaktion von 1,3‐Diisopropyl‐4,5‐dimethylimidazol‐2‐yliden mit Schwefelhalogeniden und Schwefeloxidhalogeniden
  • Beteiligte: Kuhn, Norbert; Bohnen, Hans; Fahl, Joanna; Bläser, Dieter; Boese, Roland
  • Erschienen: Wiley, 1996
  • Erschienen in: Chemische Berichte
  • Sprache: Englisch
  • DOI: 10.1002/cber.19961291228
  • ISSN: 0009-2940
  • Schlagwörter: Inorganic Chemistry
  • Entstehung:
  • Anmerkungen:
  • Beschreibung: <jats:p><jats:bold>Imidazole Derivatives, XIX</jats:bold><jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#note1" /><jats:fn><jats:p>Part XVIII: Ref.<jats:sup>[1]</jats:sup></jats:p></jats:fn> . <jats:bold>— Coordination or reduction? On the Reaction of 1,3‐Diisopropyl‐4,5‐dimethylimidazol‐2‐ylidene with Sulfur Halides and Sulfur Oxygen Halides</jats:bold> <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#note2" /> <jats:fn><jats:p>Herrn Professor <jats:italic>Max Herberhold</jats:italic> zum 60. Geburtstag gewidmet.</jats:p></jats:fn> </jats:p><jats:p>The reaction of 1,3‐diisopropyl‐4,5‐dimethylimidazol‐2‐ylidene (<jats:bold>4</jats:bold>, Im) with sulfur halides and sulfur oxygen halides may be described as a coordination (<jats:bold>1</jats:bold>) or reduction (<jats:bold>2</jats:bold>) process in respect to the sulfur centre. With SCl<jats:sub>2</jats:sub> and SOCl<jats:sub>2</jats:sub> the hypervalent sulfur compounds Im · SCl<jats:sub>2</jats:sub> (<jats:bold>5</jats:bold>) and Im · S(O)Cl<jats:sub>2</jats:sub> (<jats:bold>13</jats:bold>) are obtained. The SF<jats:sub>2</jats:sub> adduct Im · SF<jats:sub>2</jats:sub> (<jats:bold>11</jats:bold>) is formed on treatment of <jats:bold>5</jats:bold> with AgF. <jats:bold>13</jats:bold> is alkylated by methyl iodide to give the Im · S(Me)OCl<jats:sub>2</jats:sub> cation (<jats:bold>15</jats:bold>). Surprisingly, reduction of the sulfur centre (<jats:bold>2</jats:bold>) occurs on treatment of <jats:bold>4</jats:bold> with SF<jats:sub>4</jats:sub> to form the ImF<jats:sup>+</jats:sup>SF<jats:sub>3</jats:sub><jats:sup>−</jats:sup> salt <jats:bold>18</jats:bold> containing the new SF<jats:sub>3</jats:sub> anion. As expected, the same type of reaction occurs with the sulfuryl halides SO<jats:sub>2</jats:sub>ClF and SO<jats:sub>2</jats:sub>F<jats:sub>2</jats:sub> to give the fluorosulfites ImCl<jats:sup>+</jats:sup>‐SO<jats:sub>2</jats:sub>F<jats:sup>−</jats:sup> (<jats:bold>21</jats:bold>) and ImF<jats:sup>+</jats:sup>SO<jats:sub>2</jats:sub>F<jats:sup>−</jats:sup> (<jats:bold>23</jats:bold>). The X‐ray structures of <jats:bold>5</jats:bold>, <jats:bold>13</jats:bold> and <jats:bold>23</jats:bold> are reported.</jats:p>