- InChI
- InChI=1S/C5H10/c1-4-5(2)3/h2,4H2,1,3H3
- InChI Key
- MHNNAWXXUZQSNM-UHFFFAOYSA-N
- Formula
- C5H10
- SMILES
- C=C(C)CC
- Molecular Weight1
- 70.13
- CAS
- 563-46-2
- Other Names
-
- .gamma.-isoamylene
- 1-Butene, 2-methyl-
- 1-Isoamylene
- 2-Methylbutene-1
- 2-methylbut-1-ene
- C2H5C(CH3)=CH2
- Isopentene
- UN 2371
- UN 2459
- «gamma»-Isoamylene
- «gamma»-Isoamylene
- ΔcH°liquid : Standard liquid enthalpy of combustion (kJ/mol).
- Cp,gas : Ideal gas heat capacity (J/mol×K).
- Cp,liquid : Liquid phase heat capacity (J/mol×K).
- ΔfG° : Standard Gibbs free energy of formation (kJ/mol).
- ΔfH°gas : Enthalpy of formation at standard conditions (kJ/mol).
- ΔfH°liquid : Liquid phase enthalpy of formation at standard conditions (kJ/mol).
- ΔfusH° : Enthalpy of fusion at standard conditions (kJ/mol).
- ΔfusH : Enthalpy of fusion at a given temperature (kJ/mol).
- ΔvapH° : Enthalpy of vaporization at standard conditions (kJ/mol).
- ΔvapH : Enthalpy of vaporization at a given temperature (kJ/mol).
- IE : Ionization energy (eV).
- log10WS : Log10 of Water solubility in mol/l.
- logPoct/wat : Octanol/Water partition coefficient.
- McVol : McGowan's characteristic volume (ml/mol).
- Pc : Critical Pressure (kPa).
- Pvap : Vapor pressure (kPa).
- Inp : Non-polar retention indices.
- I : Polar retention indices.
- ΔfusS : Entropy of fusion at a given temperature (J/mol×K).
- S°liquid : Liquid phase molar entropy at standard conditions (J/mol×K).
- Tboil : Normal Boiling Point Temperature (K).
- Tc : Critical Temperature (K).
- Tfus : Normal melting (fusion) point (K).
- Ttriple : Triple Point Temperature (K).
- Vc : Critical Volume (m3/kmol).
- 1: Molecular weight from the IUPAC atomic weights tables.
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Physical Properties
| Property | Value | Unit | Source |
|---|---|---|---|
| ΔcH°liquid | -3335.74 ± 0.80 | kJ/mol | NIST |
| ΔfG° | 70.51 | kJ/mol | Joback Calculated Property |
| ΔfH°gas | [-35.10; -34.80] | kJ/mol |
|
| ΔfH°gas | -35.10 ± 0.84 | kJ/mol | NIST |
| ΔfH°gas | -34.80 | kJ/mol | NIST |
| ΔfH°liquid | -60.96 ± 0.84 | kJ/mol | NIST |
| ΔfusH° | 6.12 | kJ/mol | Joback Calculated Property |
| ΔvapH° | [25.90; 26.19] | kJ/mol |
|
| ΔvapH° | 26.19 | kJ/mol | NIST |
| ΔvapH° | 25.90 | kJ/mol | NIST |
| ΔvapH° | 25.90 ± 0.10 | kJ/mol | NIST |
| IE | [9.10; 9.35] | eV |
|
| IE | 9.12 ± 0.01 | eV | NIST |
| IE | 9.10 | eV | NIST |
| IE | 9.15 ± 0.00 | eV | NIST |
| IE | 9.12 | eV | NIST |
| IE | Outlier 9.35 ± 0.08 | eV | NIST |
| IE | 9.12 ± 0.02 | eV | NIST |
| IE | 9.12 ± 0.02 | eV | NIST |
| IE | 9.20 ± 0.10 | eV | NIST |
| log10WS | [-2.73; -2.73] |
|
|
| log10WS | -2.73 | Aq. Sol... | |
| log10WS | -2.73 | Estimat... | |
| logPoct/wat | 1.973 | Crippen Calculated Property | |
| McVol | 77.010 | ml/mol | McGowan Calculated Property |
| Pc | 3668.65 | kPa | Joback Calculated Property |
| Inp | [480.00; 523.00] |
|
|
| Inp | 495.60 | NIST | |
| Inp | 488.20 | NIST | |
| Inp | 490.00 | NIST | |
| Inp | 490.00 | NIST | |
| Inp | 491.00 | NIST | |
| Inp | 495.00 | NIST | |
| Inp | 495.00 | NIST | |
| Inp | 494.00 | NIST | |
| Inp | 487.90 | NIST | |
| Inp | 488.10 | NIST | |
| Inp | 488.20 | NIST | |
| Inp | 488.48 | NIST | |
| Inp | 488.00 | NIST | |
| Inp | 488.00 | NIST | |
| Inp | 493.00 | NIST | |
| Inp | 488.00 | NIST | |
| Inp | 488.00 | NIST | |
| Inp | 487.63 | NIST | |
| Inp | 487.00 | NIST | |
| Inp | 500.00 | NIST | |
| Inp | 500.00 | NIST | |
| Inp | 486.00 | NIST | |
| Inp | 488.00 | NIST | |
| Inp | 488.00 | NIST | |
| Inp | 489.00 | NIST | |
| Inp | 489.00 | NIST | |
| Inp | 497.00 | NIST | |
| Inp | 486.00 | NIST | |
| Inp | 499.00 | NIST | |
| Inp | 500.00 | NIST | |
| Inp | 496.80 | NIST | |
| Inp | 497.00 | NIST | |
| Inp | 494.40 | NIST | |
| Inp | 496.00 | NIST | |
| Inp | 493.58 | NIST | |
| Inp | 493.79 | NIST | |
| Inp | 494.00 | NIST | |
| Inp | 487.80 | NIST | |
| Inp | Outlier 523.00 | NIST | |
| Inp | 488.00 | NIST | |
| Inp | 488.00 | NIST | |
| Inp | Outlier 506.00 | NIST | |
| Inp | 495.00 | NIST | |
| Inp | 496.00 | NIST | |
| Inp | Outlier 480.00 | NIST | |
| Inp | 495.00 | NIST | |
| Inp | 493.00 | NIST | |
| Inp | 493.00 | NIST | |
| Inp | 495.00 | NIST | |
| Inp | 493.00 | NIST | |
| Inp | 489.00 | NIST | |
| Inp | 496.00 | NIST | |
| Inp | 488.00 | NIST | |
| Inp | 497.00 | NIST | |
| Inp | 494.00 | NIST | |
| Inp | 496.00 | NIST | |
| Inp | 494.00 | NIST | |
| Inp | 493.00 | NIST | |
| Inp | 487.00 | NIST | |
| Inp | 493.00 | NIST | |
| Inp | 487.00 | NIST | |
| I | [534.00; 575.00] |
|
|
| I | 545.00 | NIST | |
| I | 534.00 | NIST | |
| I | 575.00 | NIST | |
| S°liquid | [253.97; 254.00] | J/mol×K |
|
| S°liquid | 254.00 | J/mol×K | NIST |
| S°liquid | 253.97 | J/mol×K | NIST |
| Tboil | [303.45; 311.00] | K |
|
| Tboil | 304.40 | K | NIST |
| Tboil | 304.30 | K | NIST |
| Tboil | 304.20 ± 1.00 | K | NIST |
| Tboil | 304.60 ± 0.50 | K | NIST |
| Tboil | 304.20 ± 0.40 | K | NIST |
| Tboil | 304.20 ± 0.60 | K | NIST |
| Tboil | 304.31 ± 0.30 | K | NIST |
| Tboil | 303.50 ± 2.50 | K | NIST |
| Tboil | 304.50 ± 2.00 | K | NIST |
| Tboil | 304.40 ± 0.30 | K | NIST |
| Tboil | 304.35 ± 0.50 | K | NIST |
| Tboil | 304.65 ± 0.50 | K | NIST |
| Tboil | 304.05 ± 0.50 | K | NIST |
| Tboil | 304.10 ± 0.50 | K | NIST |
| Tboil | 304.15 ± 1.00 | K | NIST |
| Tboil | 304.20 ± 0.40 | K | NIST |
| Tboil | 304.20 ± 0.30 | K | NIST |
| Tboil | 304.27 ± 0.40 | K | NIST |
| Tboil | 304.20 ± 0.15 | K | NIST |
| Tboil | 304.20 ± 0.30 | K | NIST |
| Tboil | 304.30 ± 0.30 | K | NIST |
| Tboil | 304.27 ± 0.30 | K | NIST |
| Tboil | 304.15 ± 1.00 | K | NIST |
| Tboil | 304.05 ± 1.00 | K | NIST |
| Tboil | 304.15 ± 0.30 | K | NIST |
| Tboil | 304.20 ± 0.15 | K | NIST |
| Tboil | 304.20 ± 0.20 | K | NIST |
| Tboil | 305.10 ± 1.50 | K | NIST |
| Tboil | 304.50 ± 1.00 | K | NIST |
| Tboil | 303.65 ± 2.00 | K | NIST |
| Tboil | 305.00 ± 3.00 | K | NIST |
| Tboil | Outlier 311.00 ± 2.00 | K | NIST |
| Tboil | 303.45 ± 3.00 | K | NIST |
| Tboil | 304.15 ± 2.00 | K | NIST |
| Tboil | Outlier 307.15 ± 2.00 | K | NIST |
| Tboil | 306.15 ± 2.00 | K | NIST |
| Tboil | 305.15 ± 2.00 | K | NIST |
| Tboil | 304.65 ± 2.00 | K | NIST |
| Tc | [467.00; 470.00] | K |
|
| Tc | 467.90 | K | Vapor P... |
| Tc | 467.00 | K | Gas-Liq... |
| Tc | 470.00 | K | NIST |
| Tfus | 135.77 | K | Aq. Sol... |
| Ttriple | [135.60; 135.62] | K |
|
| Ttriple | 135.60 ± 0.02 | K | NIST |
| Ttriple | 135.62 ± 0.02 | K | NIST |
| Vc | 0.297 | m3/kmol | Joback Calculated Property |
Temperature Dependent Properties
| Property | Value | Unit | Temperature (K) | Source |
|---|---|---|---|---|
| Cp,gas | [116.15; 165.35] | J/mol×K | [320.66; 502.21] |
|
| Cp,gas | 116.15 ± 0.35 | J/mol×K | 320.66 | NIST |
| Cp,gas | 128.37 ± 0.39 | J/mol×K | 362.51 | NIST |
| Cp,gas | 140.62 ± 0.42 | J/mol×K | 407.11 | NIST |
| Cp,gas | 153.13 ± 0.46 | J/mol×K | 453.41 | NIST |
| Cp,gas | 165.35 ± 0.50 | J/mol×K | 502.21 | NIST |
| Cp,liquid | [157.19; 157.30] | J/mol×K | [298.15; 298.15] |
|
| Cp,liquid | 157.30 | J/mol×K | 298.15 | NIST |
| Cp,liquid | 157.19 | J/mol×K | 298.15 | NIST |
| ΔfusH | [5.36; 7.91] | kJ/mol | [104.70; 135.62] |
|
| ΔfusH | 5.36 | kJ/mol | 104.70 | NIST |
| ΔfusH | 7.91 | kJ/mol | 135.60 | NIST |
| ΔfusH | 7.91 | kJ/mol | 135.60 | NIST |
| ΔfusH | 7.91 | kJ/mol | 135.62 | NIST |
| ΔvapH | [25.50; 28.50] | kJ/mol | [288.00; 305.00] |
|
| ΔvapH | 28.50 | kJ/mol | 288.00 | NIST |
| ΔvapH | 25.50 ± 0.10 | kJ/mol | 304.00 | NIST |
| ΔvapH | 25.50 | kJ/mol | 304.30 | NIST |
| ΔvapH | 27.30 | kJ/mol | 305.00 | NIST |
| ΔfusS | [58.33; 58.34] | J/mol×K | [135.60; 135.62] |
|
| ΔfusS | 58.34 | J/mol×K | 135.60 | NIST |
| ΔfusS | 58.33 | J/mol×K | 135.62 | NIST |
Correlations
| Property | Value | Unit | Temperature (K) | Source |
|---|---|---|---|---|
| Pvap | [2.01e-05; 3528.87] | kPa | [135.58; 465.00] |
KDB Vap...
|
| Equation | ln(Pvp) = A + B/T + C*ln(T) + D*T^2 | |||
| Coefficient A | 6.78967e+01 | |||
| Coefficient B | -5.23519e+03 | |||
| Coefficient C | -8.20067e+00 | |||
| Coefficient D | 8.78420e-06 | |||
| Temperature range, min. | 135.58 | |||
| Temperature range, max. | 465.00 | |||
| Pvap | 2.01e-05 | kPa | 135.58 | Calculated Property |
| Pvap | 0.01 | kPa | 172.18 | Calculated Property |
| Pvap | 0.55 | kPa | 208.78 | Calculated Property |
| Pvap | 7.13 | kPa | 245.39 | Calculated Property |
| Pvap | 43.07 | kPa | 281.99 | Calculated Property |
| Pvap | 162.07 | kPa | 318.59 | Calculated Property |
| Pvap | 448.61 | kPa | 355.19 | Calculated Property |
| Pvap | 1011.27 | kPa | 391.80 | Calculated Property |
| Pvap | 1982.07 | kPa | 428.40 | Calculated Property |
| Pvap | 3528.87 | kPa | 465.00 | Calculated Property |
Similar Compounds
Find more compounds similar to 2-Methyl-1-butene.
Sources
- KDB Vapor Pressure Data
- Crippen Method
- Vapor Pressures and Vapor Liquid Critical Properties of Four Pentene Isomers
- Gas-Liquid Critical Temperatures of Some Alkenes, Amines, and Cyclic Hydrocarbons
- Joback Method
- KDB
- Aqueous Solubility Prediction Method
- Estimated Solubility Method
- McGowan Method
- NIST Webbook
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