thionyl chloride: meaning, definition, pronunciation and examples
Very Low (specialist technical term)Technical/Scientific
Quick answer
What does “thionyl chloride” mean?
An inorganic compound with the chemical formula SOCl₂, used primarily as a chlorinating agent in organic synthesis and as a precursor to other sulfur compounds.
Audio
Pronunciation
Definition
Meaning and Definition
An inorganic compound with the chemical formula SOCl₂, used primarily as a chlorinating agent in organic synthesis and as a precursor to other sulfur compounds.
A corrosive, moisture-sensitive, volatile liquid that fumes in air and reacts violently with water, releasing toxic gases. It is a key reagent for converting carboxylic acids to acid chlorides and alcohols to alkyl chlorides.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Spelling and usage are identical. Pronunciations differ slightly.
Connotations
Identical technical connotations in both dialects.
Frequency
Equally rare and specialized in both dialects, confined to chemical literature, industry, and education.
Grammar
How to Use “thionyl chloride” in a Sentence
[Compound] + is treated with + thionyl chloride[Alcohol/Acid] + reacts with + thionyl chloride[Synthesis] + employs + thionyl chloride[Reaction] + requires + thionyl chlorideVocabulary
Collocations
Examples
Examples of “thionyl chloride” in a Sentence
noun
British English
- The thionyl chloride was added cautiously to the reaction flask.
- We need to order more thionyl chloride for the lab.
American English
- Thionyl chloride is a common reagent for that conversion.
- The hazards of thionyl chloride are well documented in the SDS.
Usage
Meaning in Context
Business
Rare; may appear in procurement, safety data sheets (SDS), or chemical supply catalogs.
Academic
Common in advanced organic chemistry textbooks, research papers, and laboratory manuals.
Everyday
Virtually never used.
Technical
Core term in synthetic organic chemistry, industrial chemical processes, and materials science.
Vocabulary
Synonyms of “thionyl chloride”
Strong
Neutral
Weak
Vocabulary
Antonyms of “thionyl chloride”
Watch out
Common Mistakes When Using “thionyl chloride”
- Misspelling as 'thionylchloride' (should be two words).
- Confusing with 'sulfuryl chloride' or 'phosphorus oxychloride'.
- Incorrect pronunciation stressing 'chloride' on the first syllable.
FAQ
Frequently Asked Questions
Yes. It is corrosive, reacts violently with water producing toxic sulfur dioxide and hydrogen chloride gases, and requires careful handling in a fume hood with appropriate PPE.
No, absolutely not. All reactions and handling must be under anhydrous conditions due to its violent hydrolysis.
It is a colorless to pale yellow fuming liquid with a pungent, suffocating odor.
Sulfur dioxide (SO₂) and hydrogen chloride (HCl) gases are evolved, which is useful as these are gaseous and easily drive the reaction to completion or can be vented.
An inorganic compound with the chemical formula SOCl₂, used primarily as a chlorinating agent in organic synthesis and as a precursor to other sulfur compounds.
Thionyl chloride is usually technical/scientific in register.
Thionyl chloride: in British English it is pronounced /ˈθaɪənɪl ˈklɔːraɪd/, and in American English it is pronounced /ˈθaɪənɪl ˈklɔːraɪd/ or /ˈθaɪəˌnɪl ˈklɔːraɪd/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None”
Learning
Memory Aids
Mnemonic
Think: THIOnyl = contains sulfur (Greek 'theion'). CHLORide = contains chlorine. It's a SOCl₂ molecule.
Conceptual Metaphor
A chemical 'tool' or 'building block' for installing chlorine atoms or activating molecules for further reaction.
Practice
Quiz
What is a primary use of thionyl chloride?