Organic cadmium compounds
Organocadmium compounds belong to the group of organometallic compounds . With the exception of the Cd salts of fatty acids (cadmium soap such as cadmium stearate ), the organic cadmium compounds have no technical significance worth mentioning.
properties
Dialkylcadmium compounds (R 2 Cd; R = CH 3 , C 2 H 5 ) are volatile liquids which - in contrast to the corresponding zinc dialkyls - do not ignite on contact with air. Dimethyl and diethyl cadmium decompose with water .
Manufacturing
To produce dialkylcadmium compounds, cadmium chloride (CdCl 2 ) or cadmium bromide (CdBr 2 ) is reacted with Grignard compounds :
use
If a carboxylic acid chloride 1 is reacted with a dialkylcadmium compound, a ketone 2 is formed . In contrast to a Grignard compound, the dialkylcadmium compound does not add to the carbonyl group :
Because of the low atomic efficiency of this synthesis method, which produces stoichiometric amounts of salt of toxic cadmium halides, this process is purely a laboratory method without any technical significance.
Individual evidence
- ↑ a b Otto-Albrecht Neumüller (Ed.): Römpps Chemie Lexikon , 8th edition, Frank'sche Verlagshandlung, Stuttgart 1983, ISBN 3-440-04513-7 , pp. 553-554, ISBN 3-440-04513- 7 .
- ^ A b c Siegfried Hauptmann : Organic Chemistry , 2nd revised edition, VEB Deutscher Verlag für Grundstoffindindustrie, Leipzig, 1985, p. 547, ISBN 3-342-00280-8 .