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Names | |
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IUPAC name | |
Systematic IUPAC name
Methyloxidocarbon(•)[4] (additive) | |
Identifiers | |
3D model (JSmol)
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Abbreviations | Ac |
1697938 | |
ChEBI | |
ChemSpider | |
786 | |
PubChem CID
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Properties | |
C2H3O | |
Molar mass | 43.045 g·mol−1 |
Thermochemistry | |
Std enthalpy of
formation (ΔfH⦵298) |
−15 to −9 kJ mol−1 |
Related compounds | |
Related compounds
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Acetone Carbon monoxide Acetic acid |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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In organic chemistry, acetyl is a functional group with the chemical formula −COCH3 and the structure −C(=O)−CH3. It is sometimes represented by the symbol Ac[5][6] (not to be confused with the element actinium). In IUPAC nomenclature, acetyl is called ethanoyl.
The acetyl group contains a methyl group (−CH3) single-bonded to a carbonyl (C=O), making it an acyl group. The carbonyl center of an acyl radical has one nonbonded electron with which it forms a chemical bond to the remainder R of the molecule.
The acetyl moiety is a component of many organic compounds, including acetic acid, the neurotransmitter acetylcholine, acetyl-CoA, acetylcysteine, acetaminophen (also known as paracetamol), and acetylsalicylic acid (also known as aspirin).