- InChI
- InChI=1S/C4H4O/c1-2-3-4-5/h4H,1H3
- InChI Key
- REJPDMLLCDXIOV-UHFFFAOYSA-N
- Formula
- C4H4O
- SMILES
- CC#CC=O
- Molecular Weight1
- 68.07
- CAS
- 1119-19-3
- Other Names
-
- 1-Formyl-1-propyne
- But-2-ynal
- CH3CCCHO
- Methylacetyllealdehyde
- Tetrolaldehyde
- Cp,gas : Ideal gas heat capacity (J/mol×K).
- ΔfusH° : Enthalpy of fusion at standard conditions (kJ/mol).
- IE : Ionization energy (eV).
- logPoct/wat : Octanol/Water partition coefficient.
- McVol : McGowan's characteristic volume (ml/mol).
- Pvap : Vapor pressure (kPa).
- Tboil : Normal Boiling Point Temperature (K).
- Tboilr : Boiling point at reduced pressure (K).
- 1: Molecular weight from the IUPAC atomic weights tables.
Physical Properties
| Property | Value | Unit | Source |
|---|---|---|---|
| ΔfusH° | 11.53 | kJ/mol | Joback Calculated Property |
| IE | [10.20; 10.28] | eV |
|
| IE | 10.28 | eV | NIST |
| IE | 10.25 ± 0.05 | eV | NIST |
| IE | 10.20 | eV | NIST |
| logPoct/wat | 0.209 | Crippen Calculated Property | |
| McVol | 60.190 | ml/mol | McGowan Calculated Property |
| Tboil | 379.70 | K | NIST |
Cheméo can also estimate Normal melting (fusion) point, Critical Temperature, Critical Pressure, Critical Volume, Enthalpy of formation at standard conditions, Enthalpy of vaporization at standard conditions, Standard Gibbs free energy of formation, Acentric Factor, Log10 of Water solubility in mol/l for this compound, but they fall outside the models' validated range, so they are not shown here. Open the prediction tool to compute them on demand.
Temperature Dependent Properties
| Property | Value | Unit | Temperature (K) | Source |
|---|---|---|---|---|
| Cp,gas | [89.96; 116.36] | J/mol×K | [348.58; 549.03] |
|
| Cp,gas | 89.96 | J/mol×K | 348.58 | Joback Calculated Property |
| Cp,gas | 94.79 | J/mol×K | 381.99 | Joback Calculated Property |
| Cp,gas | 99.45 | J/mol×K | 415.40 | Joback Calculated Property |
| Cp,gas | 103.93 | J/mol×K | 448.80 | Joback Calculated Property |
| Cp,gas | 108.24 | J/mol×K | 482.21 | Joback Calculated Property |
| Cp,gas | 112.38 | J/mol×K | 515.62 | Joback Calculated Property |
| Cp,gas | 116.36 | J/mol×K | 549.03 | Joback Calculated Property |
Pressure Dependent Properties
| Property | Value | Unit | Pressure (kPa) | Source |
|---|---|---|---|---|
| Tboilr | 300.70 | K | 4.50 | NIST |
Correlations
| Property | Value | Unit | Temperature (K) | Source |
|---|---|---|---|---|
| Pvap | [1.33; 202.64] | kPa | [285.72; 426.15] |
The Yaws Handbook of Vapor Pressure
|
| Equation | ln(Pvp) = A + B/(T + C) | |||
| Coefficient A | 1.38625e+01 | |||
| Coefficient B | -3.24478e+03 | |||
| Coefficient C | -4.66930e+01 | |||
| Temperature range, min. | 285.72 | |||
| Temperature range, max. | 426.15 | |||
| Pvap | 1.33 | kPa | 285.72 | Calculated Property |
| Pvap | 3.06 | kPa | 301.32 | Calculated Property |
| Pvap | 6.39 | kPa | 316.93 | Calculated Property |
| Pvap | 12.31 | kPa | 332.53 | Calculated Property |
| Pvap | 22.16 | kPa | 348.13 | Calculated Property |
| Pvap | 37.64 | kPa | 363.74 | Calculated Property |
| Pvap | 60.83 | kPa | 379.34 | Calculated Property |
| Pvap | 94.17 | kPa | 394.94 | Calculated Property |
| Pvap | 140.43 | kPa | 410.55 | Calculated Property |
| Pvap | 202.64 | kPa | 426.15 | Calculated Property |
Similar Compounds
Find more compounds similar to 2-Butynal.
Sources
- Cheméo Relay (1.0, beta) Beta: served but experimental, data-limited and below our cross-validation release bar; the Joback value is recommended where available.
- Crippen Method
- Crippen Method
- Joback Method
- McGowan Method
- NIST Webbook
- The Yaws Handbook of Vapor Pressure
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