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2-butyne
Sign in to saveAlso known as dimethylacetylene
2-Butyne (dimethylacetylene, crotonylene or but-2-yne) is an alkyne with chemical formula CH3C≡CCH3. Produced artificially, it is a colorless, volatile, pungent liquid at standard temperature and pressure.
In the Vinony graph
Vinony's link graph records 50 inbound references to 2-butyne, and connects out to alkylation, 1-butyne and hex-3-yne.
It is catalogued under topics including Alkynes, Chembox image size set and ECHA InfoCard ID from Wikidata.
Vinony links it to 29 Wikipedia language editions.
Chemical data
- Formula
- C4H6
- Molecular weight
- 54.09 g/mol
- IUPAC name
- but-2-yne
- SMILES
- CC#CC
- InChIKey
- XNMQEEKYCVKGBD-UHFFFAOYSA-N
- XLogP
- 1.5
- Polar surface area
- 0 Ų
- H-bond donors
- 0
- H-bond acceptors
- 0
- Formal charge
- 0
via PubChem
Drug data · ChEMBL
- Molecule type
- Small molecule
via ChEMBL · EBI
Wikidata facts
- Mass
- 54.092
Show 9 more facts
- electric dipole moment
- 0
- chemical formula
- C₄H₆
- ionization energy
- 9.56
- boiling point
- 26.97
- canonical SMILES
- CC#CC
- Commons category
- 2-Butyne
- melting point
- -32.36
- found in taxon
- Tuber borchii
- density
- 0.686
Sources (1)
via Wikidata · CC0
~2 min read
Encyclopedic overview
4 sectionsContents
- Synthesis
- Applications
- See also
- References
2-Butyne (dimethylacetylene, crotonylene or but-2-yne) is an alkyne with chemical formula CH3C≡CCH3. Produced artificially, it is a colorless, volatile, pungent liquid at standard temperature and pressure.
2-Butyne is of interest to physical chemists because of its very low torsional barrier and the problem of determining that barrier using high-resolution infrared spectroscopy. Analysis of its infrared spectrum leads to a determination that the torsional barrier is only 6 cm−1 (1.2 J or 72 J mol−1). However, it has not been determined whether the equilibrium structure is eclipsed (D3h) or staggered (D3d). Symmetry analysis using the Molecular Symmetry Group G36 shows that one would need to analyse its high resolution rotation-vibration Raman spectrum to determine its equilibrium structure. Pulsed-field-ionisation zero-kinetic-energy (PFI-ZEKE) photoelectron spectra of 2-butyne and its fully deuterated isotopomer have been recorded and analysed.
Excerpted from Wikipedia’s “2-butyne” article, available under the CC BY-SA 4.0 licence.