diazomethane: meaning, definition, pronunciation and examples
Very LowTechnical/Scientific
Quick answer
What does “diazomethane” mean?
A highly toxic, explosive yellow gas with the chemical formula CH₂N₂, used as a methylating agent in organic synthesis.
Audio
Pronunciation
Definition
Meaning and Definition
A highly toxic, explosive yellow gas with the chemical formula CH₂N₂, used as a methylating agent in organic synthesis.
In organic chemistry, a versatile reagent for converting carboxylic acids to methyl esters and for homologation reactions via the Arndt-Eistert synthesis. It is also a potent carcinogen and must be handled with extreme caution.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or spelling differences. Pronunciation may vary slightly (see IPA).
Connotations
Identical technical connotations of danger and utility in both varieties.
Frequency
Equally rare and confined to specialized chemical literature and laboratories in both regions.
Grammar
How to Use “diazomethane” in a Sentence
[substance] is methylated with diazomethaneDiazomethane is used to convert [acid] to [ester]The generation of diazomethane from [precursor]Vocabulary
Collocations
Examples
Examples of “diazomethane” in a Sentence
adjective
British English
- The diazomethane solution must be kept cold.
- A diazomethane-mediated transformation.
American English
- The diazomethane reagent must be kept cold.
- A diazomethane-based synthesis.
Usage
Meaning in Context
Business
Not used.
Academic
Used in advanced chemistry textbooks and research papers discussing organic synthesis methodologies.
Everyday
Never used.
Technical
Core term in synthetic organic chemistry laboratories and chemical hazard documentation.
Vocabulary
Synonyms of “diazomethane”
Neutral
Weak
Watch out
Common Mistakes When Using “diazomethane”
- Misspelling as 'diazomethan' or 'diazomethyne'.
- Mispronouncing the stress pattern (e.g., diaZO methane vs. diazoMETHane).
- Using it in non-chemical contexts.
FAQ
Frequently Asked Questions
It is primarily used in organic chemistry as a methylating agent, especially for converting carboxylic acids to their methyl esters, and in the Arndt-Eistert synthesis for homologating carboxylic acids.
Diazomethane is highly toxic, explosive when concentrated or upon contact with sharp edges, and is a known carcinogen. It requires specialised equipment and procedures for safe handling.
It is rarely shipped as a pure compound due to its hazards. It is usually generated in the laboratory as needed from stable precursors like N-methyl-N-nitrosourea or Diazald®.
No, it is a very low-frequency, specialised technical term known almost exclusively to chemists and related professionals. It does not appear in general vocabulary.
A highly toxic, explosive yellow gas with the chemical formula CH₂N₂, used as a methylating agent in organic synthesis.
Diazomethane is usually technical/scientific in register.
Diazomethane: in British English it is pronounced /ˌdʌɪəzəʊˈmiːθeɪn/, and in American English it is pronounced /daɪˌæzoʊˈmɛθeɪn/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
DIAzoMETHANE: Think 'DIA' for the nitrogen pair (N₂), 'METH' for the methyl group (CH₃-), and 'ANE' as in methane. A methane molecule with a diazo (N₂) group attached.
Conceptual Metaphor
A 'double-edged sword' or 'volatile assistant' – a powerful tool that can achieve the desired chemical transformation but is inherently dangerous and requires skilled handling.
Practice
Quiz
What is the primary safety concern associated with diazomethane?