Molecular properties
- Formula
- C2H2
- Molar mass
- 26.04 g·mol−1
- Exact mass
- 26.0157 Da
- 2
- 0
- 0
- 0.00 Ų
- 0.4 (PubChem computed XLogP3-AA descriptor)
- CAS
- 74-86-2
- PubChem CID
- 6326
Molecule record
Ethyne
C2H2
26.04 g/mol
Interactions
- Polarity
- Often weakly polar or nonpolar unless other structural features dominate.
- Acid-base behavior
- Review ionizable groups and pKa data where available; ChemForge does not infer definitive acid-base state from identity alone.
- Intermolecular forces
- Assess dispersion, dipole interactions, hydrogen bonding, and ionic character from the functional groups shown.
Functional groups
Alkyne
Physical properties
| Property | Value | Conditions | Source |
|---|---|---|---|
| Logp | 0.4 | PubChem computed XLogP3-AA descriptor | PubChem(link only) |
Common names and synonyms
- 200-816-9
- 74-86-2
- ACETYLENE
- ACETYLENE (1,2-13C2)
- ACETYLENE (D1)
- Acetylen
- Azetylen
- C2H2
Show all 22 synonyms
- CH#CH
- CHEBI:27518
- DTXCID906379
- DTXSID6026379
- Ethenylene
- Ethin
- Ethine
- HC#CH
- Narcylen
- OC7TV75O83
- RefChem:109145
- Vinylene
- [CH(CH)]
- acetylene;ethyne
Structure identifiers
- Canonical SMILES
- C#C
- Isomeric SMILES
- C#C
- InChI
- InChI=1S/C2H2/c1-2/h1-2H
- InChIKey
- HSFWRNGVRCDJHI-UHFFFAOYSA-N
- PubChem CID
- 6326
Spectroscopy
Tabs appear only for spectra stored with clear provenance.
Simulated FTIR trace
Predicted FTIR / %T
4 cm-1 resolution / deterministic instrument profile
Hover for cursor
Peak assignments
2120 cm−1C≡C alkyne (simulated)
2960 cm−1sp3 C-H (simulated)
Simulated NMR
On-demand educational prediction for Ethyne; not experimental data.
Simulated EI mass spectrum
On-demand educational fragmentation for Ethyne; not experimental data.
Sources
Molecule identity
Retrieved 8/7/2026. Reuse status is summarized by the badge; open the source for full details.
simulated IR
ChemForge original educational simulation.