sulfinyl group: meaning, definition, pronunciation and examples
C2Technical/Scientific
Quick answer
What does “sulfinyl group” mean?
A specific functional group in organic chemistry with the structure R-S(O)-R', where a sulfur atom is bonded to two organic radicals and one oxygen atom via a double bond.
Audio
Pronunciation
Definition
Meaning and Definition
A specific functional group in organic chemistry with the structure R-S(O)-R', where a sulfur atom is bonded to two organic radicals and one oxygen atom via a double bond.
The term can also refer to the −S(O)− moiety itself when considered as a substituent or a part of a larger molecule, playing a key role in the reactivity and properties of compounds like sulfoxides.
Dialectal Variation
British vs American Usage
Differences
Spelling: 'sulphinyl' is the traditional British spelling, while 'sulfinyl' is the standard American and IUPAC-preferred spelling. Both are understood internationally in scientific literature.
Connotations
None beyond the spelling preference. The IUPAC standardization on 'sulfur-' has made 'sulfinyl' increasingly common in UK technical writing.
Frequency
The American spelling 'sulfinyl' is more frequent globally due to IUPAC and major journal style guides. The British 'sulphinyl' persists in some older UK publications.
Grammar
How to Use “sulfinyl group” in a Sentence
[Compound] with a sulfinyl groupThe sulfinyl group in [Compound name][Reaction] of the sulfinyl groupVocabulary
Collocations
Examples
Examples of “sulfinyl group” in a Sentence
verb
British English
- The compound can be sulphinylated under mild conditions.
- They attempted to sulphinylate the aromatic ring.
American English
- The reaction sulfinylates the alpha carbon.
- This reagent is used to sulfinylate amines.
adjective
British English
- The sulphinyl functionality is chiral.
- We observed a sulphinyl compound derivative.
American English
- The key intermediate has a sulfinyl center.
- Sulfinyl imines are useful precursors.
Usage
Meaning in Context
Academic
Common in advanced organic chemistry, medicinal chemistry, and chemical patent literature.
Everyday
Virtually never used.
Technical
The primary and exclusive context. Used in research papers, chemical nomenclature, and material safety data sheets (MSDS).
Vocabulary
Synonyms of “sulfinyl group”
Strong
Neutral
Weak
Vocabulary
Antonyms of “sulfinyl group”
Watch out
Common Mistakes When Using “sulfinyl group”
- Pronouncing it as 'sulf-in-ill' (/sʌlfɪnɪl/) instead of 'sulf-in-yl' (/sʌlfɪnɪl/). The difference is subtle. Confusing it with 'sulfonyl' (−SO₂−), which has two oxygen atoms.
FAQ
Frequently Asked Questions
Not exactly. A sulfoxide is a compound CONTAINING a sulfinyl group bonded to two carbon atoms (R-S(O)-R'). The 'sulfinyl group' is the functional moiety (−S(O)−) itself.
Yes, certain biologically active molecules, like some allicin derivatives in garlic, contain sulfinyl groups.
They are important because they are chiral (when the two R groups are different), act as directing groups in synthesis, and are key intermediates in oxidation reactions and in many pharmaceuticals.
Both are historically correct depending on region ('sulfinyl' US/IUPAC, 'sulphinyl' UK), but 'sulfinyl' is the modern international standard in scientific literature.
A specific functional group in organic chemistry with the structure R-S(O)-R', where a sulfur atom is bonded to two organic radicals and one oxygen atom via a double bond.
Sulfinyl group is usually technical/scientific in register.
Sulfinyl group: in British English it is pronounced /ˈsʌlfɪnɪl ɡruːp/, and in American English it is pronounced /ˈsʌlfɪnɪl ɡrup/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think 'SULFur' with an 'IN' between and an 'YL' ending for a group: SULF-IN-YL. It's a group where sulfur (SULF) is IN the middle, bonded to an oxygen and carbon parts (YL).
Conceptual Metaphor
A molecular 'handshake' where sulfur is the palm, holding two carbon 'fingers' (R groups) and one oxygen 'finger' tightly bound.
Practice
Quiz
What is the correct structural representation of a sulfinyl group?