cacodyl group
Definition
Noun: - The univalent group derived from arsine: A specific chemical group or radical with the formula (CH₃)₂As-, formed by removing one hydrogen atom from arsine (AsH₃) and replacing the other two hydrogen atoms with methyl (CH₃) groups. It is a highly toxic and foul-smelling organoarsenic compound.
Usage Examples
- Noun:
- The compound contains a cacodyl group bonded to a phenyl ring.
- Early research in organometallic chemistry involved the unstable cacodyl group.
- The characteristic odor was attributed to the presence of the cacodyl group.
Advanced Usage
- "Cacodyl group" in historical context: The discovery of compounds containing the cacodyl group in the early 19th century (e.g., cacodyl oxide) was foundational for the field of organometallic chemistry, despite their extreme toxicity and pyrophoric nature.
- As a ligand: In coordination chemistry, the cacodyl group can sometimes act as a ligand, bonding to a central metal atom through the arsenic atom.
Variants and Related Words
- Cacodyl (noun): Can refer to the free radical dimer ((CH₃)₂As–As(CH₃)₂) or, more broadly, to compounds containing the cacodyl group.
- Cacodylate (noun): A salt or ester of cacodylic acid, where the cacodyl group is part of an acid structure (e.g., (CH₃)₂AsO₂H).
- Cacodylic acid (noun): An organoarsenic compound with the formula (CH₃)₂AsO₂H, which can be viewed as an oxidized derivative of the cacodyl group.
Synonyms
- Dimethylarsino group: A more systematic name for the cacodyl group, (CH₃)₂As-.
- Alkarsinyl group: A more general, historical term for radicals derived from arsine.
Related Phrases / Idioms
(This term is highly technical and scientific; it does not have idiomatic or phrasal verb usage in everyday language.)
Noun
-
the univalent group derived from arsine
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