cacodyl
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Definition
- Noun:
- A univalent radical derived from arsine: In chemistry, "cacodyl" refers to the univalent radical or group with the formula (CH₃)₂As-.
- A poisonous, flammable compound: "Cacodyl" also refers specifically to tetramethyldiarsine, a toxic, oily, and spontaneously flammable liquid composed of two cacodyl groups, known for its strong garlic-like odor.
Usage Examples
- Noun (Radical):
- The chemist identified the cacodyl group within the larger organic molecule.
- This reaction involves the substitution of a hydrogen atom with a cacodyl radical.
- Noun (Compound):
- Early chemists handled cacodyl with extreme caution due to its toxicity and tendency to ignite in air.
- The laboratory was evacuated because of a cacodyl leak.
Advanced Usage
- "Cacodyl oxide": A specific compound formed from cacodyl groups.
- Cacodyl oxide is another arsenic-containing compound studied in organometallic chemistry.
- "Cacodylic acid": An organoarsenic compound derived from cacodyl.
- Cacodylic acid was once used as a herbicide and defoliant.
Variants and Related Words
- Cacodylic (adj): Relating to or derived from cacodyl.
- The sample was tested for cacodylic compounds.
- Cacodylate (n): A salt or ester of cacodylic acid.
- Sodium cacodylate is sometimes used as a buffer in biological preparations.
Synonyms
- Tetramethyldiarsine: The systematic chemical name for the compound "cacodyl".
- Alkarsine: An older, less common name for the same compound.
Notes on Meaning
The word "cacodyl" has two primary, closely related meanings in chemistry: 1. It denotes a specific functional group (the (CH₃)₂As- radical). 2. It is the common name for the dimeric compound formed by two such groups (tetramethyldiarsine). The context of a sentence usually makes it clear which meaning is intended.
Noun
- the univalent group derived from arsine
- a poisonous oily liquid with a garlicky odor composed of 2 cacodyl groups; undergoes spontaneous combustion in dry air