Triarylboranes

Triarylborane (triphenylborane)

In chemistry, triarylboranes (BAr ₃ ) belong to the group of organoboron compounds. The most important triarylborane is triphenylborane (BPh ₃ ).

Manufacturing

Triphenylborane can be obtained by reacting boron trifluoride diethyl etherate with phenylmagnesium bromide :

${\displaystyle {\ce {BF3*O(C2H5)2 + 3C6H5MgBr -> B(C6H5)3 + 3MgBrF + (C2H5)2O}}}$

properties

Triarylboranes are more stable to oxidation than trialkylboranes . Triarylboranes react with sodium or potassium to form colored radical anions.

In contrast to diborane (B ₂ H ₆ ), the triarylboranes are in monomeric form because dimerization via two-electron three-center bonds is prevented for steric reasons.

Individual evidence

1. ^ ^{A b c d e} Siegfried Hauptmann : Organic Chemistry , 2nd revised edition, VEB Deutscher Verlag für Grundstoffindindustrie, Leipzig 1985, ISBN 3-342-00280-8 , pp. 548-549.
2. ↑ Alfred Golloch, Heinz M. Kuss, Peter Sartori: Inorganic-Chemical Preparations. Walter de Gruyter, 1985, ISBN 978-3-110-83694-3 , p. 102 ( limited preview in Google book search).