Bromonium ion

from Wikipedia, the free encyclopedia

In organic chemistry, a bromonium ion is a compound that contains a positively charged bromine ion. The first step in the addition of bromine to an alkene can result in a bromonium ion or a carbenium ion :

Formation of a bromonium ion in the bromination of (Z) -β-methylstyrene. [3]

Apart from that, bromonium ions R (R ') Br + occur very rarely, since the bromine atoms in hydrogen bromide and bromoalkanes are poor nucleophiles and also have little tendency to accept protons (or donate an electron pair). Both would be further possible mechanisms for the formation of a bromonium ion.

Individual evidence

  1. ^ Brockhaus ABC Chemie , VEB FA Brockhaus Verlag Leipzig 1965, p. 205.
  2. ^ Siegfried Hauptmann : Organic Chemistry , 2nd revised edition, VEB Deutscher Verlag für Grundstoffindustrie, Leipzig, 1985, p. 233, ISBN 3-342-00280-8 .
  3. ↑ Joachim Buddrus: Fundamentals of Organic Chemistry , 4th edition, de Gruyter Verlag, Berlin, 2011, pp. 166–167, ISBN 978-3-11-024894-4 .