
Cadet's fuming liquid was a red-brown oily liquid prepared in 1760 by the French chemist
Louis Claude Cadet de Gassicourt (1731-1799) by the reaction of
potassium acetate with
arsenic trioxide. It consisted mostly of
dicacodyl (((CH
3)
2As)
2) and
cacodyl oxide (((CH
3)
2As)
2O).
The global reaction (mass balance) corresponding to the oxide formation is the following:
:
These were the first
organometallic
Organometallic chemistry is the study of organometallic compounds, chemical compounds containing at least one chemical bond between a carbon atom of an organic molecule and a metal, including alkali, alkaline earth, and transition metals, and so ...
substances prepared; as such, Cadet has been regarded as the father of organometallic chemistry.
This liquid develops white fumes when exposed to air, resulting in a pale flame producing carbon dioxide, water, and
arsenic trioxide. It has a nauseating and very disagreeable garlic-like odor.
Around 1840,
Robert Bunsen
Robert Wilhelm Eberhard Bunsen (;
30 March 1811
– 16 August 1899) was a German chemist. He investigated emission spectra of heated elements, and discovered caesium (in 1860) and rubidium (in 1861) with the physicist Gustav Kirchhoff. The Bu ...
did much work on characterizing the compounds in the liquid and its derivatives. His research was important in the development of
radical theory
Radical theory is an obsolete scientific theory in chemistry describing the structure of organic compounds. The theory was pioneered by Justus von Liebig, Friedrich Wöhler and Auguste Laurent around 1830 and is not related to the modern understa ...
.
References
{{reflist
Organometallic chemistry
Organoarsenic compounds
Chemical mixtures