The New Fluoro‐tris(pentafluoroethyl)borate Anion [(C2F5)3BF]—, Unexpected Formation of [(C2F5)3BH]— as a By‐Product. Das neue Fluoro‐tris(pentafluoroethyl)borat Anion [(C2F5)3BF]—, unerwartete Bildung des Nebenprodukts [(C2F5)3BH]—
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Media type:
E-Article
Title:
The New Fluoro‐tris(pentafluoroethyl)borate Anion [(C2F5)3BF]—, Unexpected Formation of [(C2F5)3BH]— as a By‐Product. Das neue Fluoro‐tris(pentafluoroethyl)borat Anion [(C2F5)3BF]—, unerwartete Bildung des Nebenprodukts [(C2F5)3BH]—
Contributor:
Pawelke, Gottfried;
Willner, Helge
imprint:
Wiley, 2005
Published in:Zeitschrift für anorganische und allgemeine Chemie
Description:
<jats:title>Abstract</jats:title><jats:p>Dimethylamine‐tris(pentafluoroethyl)borane (C<jats:sub>2</jats:sub>F<jats:sub>5</jats:sub>)<jats:sub>3</jats:sub>B · NHMe<jats:sub>2</jats:sub> (<jats:bold>1</jats:bold>) has been obtained from C<jats:sub>2</jats:sub>F<jats:sub>5</jats:sub>I, Br<jats:sub>2</jats:sub>BNMe<jats:sub>2</jats:sub> and tris(diethylamino)phosphane in sulfolane. Alkylation using CH<jats:sub>3</jats:sub>I/KOH yielded the trimethylamine‐tris(pentafluoroethyl)borane (C<jats:sub>2</jats:sub>F<jats:sub>5</jats:sub>)<jats:sub>3</jats:sub>B · NMe<jats:sub>3</jats:sub> (<jats:bold>2</jats:bold>). Compound <jats:bold>2</jats:bold> reacts with NEt<jats:sub>3</jats:sub>×3HF at 200—204 °C under replacement of the trimethylamine ligand to form the novel fluoro‐tris(pentafluoroethyl)borate anion [(C<jats:sub>2</jats:sub>F<jats:sub>5</jats:sub>)<jats:sub>3</jats:sub>BF]<jats:sup>—</jats:sup> (<jats:bold>3</jats:bold>) in good yield. Side products are the hydroxy‐tris(pentafluoroethyl)borate [(C<jats:sub>2</jats:sub>F<jats:sub>5</jats:sub>)<jats:sub>3</jats:sub>BOH]<jats:sup>—</jats:sup> (<jats:bold>4</jats:bold>) and the hydrido‐tris(pentafluoroethyl)borate [(C<jats:sub>2</jats:sub>F<jats:sub>5</jats:sub>)<jats:sub>3</jats:sub>BH]<jats:sup>—</jats:sup> (<jats:bold>5</jats:bold>).</jats:p>