2,4-Hexadiene, 2,5-dimethyl-
- Formula: C8H14
- Molecular weight: 110.1968
- IUPAC Standard InChI: InChI=1S/C8H14/c1-7(2)5-6-8(3)4/h5-6H,1-4H3
- IUPAC Standard InChIKey: DZPCYXCBXGQBRN-UHFFFAOYSA-N
- CAS Registry Number: 764-13-6
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Biisobutenyl; Biisocrotyl; Diisocrotyl; 2,5-Dimethyl-2,4-hexadiene; (CH3)2C=CHCH=C(CH3)2; 2,5-Dimethylhexa-2,4-diene; NSC 10812
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Gas phase thermochemistry data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -4.59 ± 0.20 | kcal/mol | Ccr | Steele, Chirico, et al., 1990 |
Condensed phase thermochemistry data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°liquid | -15.09 ± 0.20 | kcal/mol | Ccr | Steele, Chirico, et al., 1990 | ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°liquid | -1215.53 ± 0.17 | kcal/mol | Ccr | Steele, Chirico, et al., 1990 | Corresponding ΔfHºliquid = -15.09 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
Constant pressure heat capacity of liquid
| Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 109.7 | 298.15 | Steele, Chirico, et al., 1990 | Authors give Cp/R = 55.2. This value appears too large by a factor of two. Actual Cp should be around 229.5 J/mol*K.; DH |
Phase change data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Tboil | 407. ± 2. | K | AVG | N/A | Average of 13 out of 14 values; Individual data points |
| Quantity | Value | Units | Method | Reference | Comment |
| Tfus | 287.1 ± 0.6 | K | AVG | N/A | Average of 8 values; Individual data points |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔvapH° | 10.50 ± 0.01 | kcal/mol | V | Steele, Chirico, et al., 1990 | ALS |
IR Spectrum
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Gas Phase Spectrum
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Additional Data
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| Owner | NIST Standard Reference Data Program Collection (C) 2018 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
|---|---|
| Origin | Sadtler Research Labs Under US-EPA Contract |
| Source reference | No.222124 (NIST/EPA/NIH MS Database) |
| State | gas |
Mass spectrum (electron ionization)
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Spectrum
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Additional Data
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Due to licensing restrictions, this spectrum cannot be downloaded.
| Owner | NIST Mass Spectrometry Data Center Collection (C) 2014 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
|---|---|
| NIST MS number | 1481 |
UV/Visible spectrum
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Victor Talrose, Eugeny B. Stern, Antonina A. Goncharova, Natalia A. Messineva, Natalia V. Trusova, Margarita V. Efimkina
Spectrum
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Additional Data
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| Source | Forbes, Shilton, et al., 1964 |
|---|---|
| Owner | INEP CP RAS, NIST OSRD Collection (C) 2007 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
| Origin | INSTITUTE OF ENERGY PROBLEMS OF CHEMICAL PHYSICS, RAS |
| Source reference | RAS UV No. 7337 |
| Instrument | Unicam SP 500, Beckman DU, Cary 14 |
| Melting point | 14 |
| Boiling point | 134.5 |
Gas Chromatography
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Kovats' RI, non-polar column, isothermal
| Column type | Active phase | Temperature (C) | I | Reference | Comment |
|---|---|---|---|---|---|
| Capillary | SE-30 | 130. | 861. | Bredael, 1982 | Column length: 100. m; Column diameter: 0.5 mm |
| Capillary | SE-30 | 80. | 862. | Bredael, 1982 | Column length: 100. m; Column diameter: 0.5 mm |
Van Den Dool and Kratz RI, polar column, temperature ramp
| Column type | Active phase | I | Reference | Comment |
|---|---|---|---|---|
| Capillary | Supelcowax-10 | 1032. | Matiella and Hsieh, 1990 | 60. m/0.25 mm/0.25 μm, 40. C @ 5. min, 2. K/min, 175. C @ 20. min |
Normal alkane RI, non-polar column, temperature ramp
| Column type | Active phase | I | Reference | Comment |
|---|---|---|---|---|
| Capillary | OV-1 | 821. | Orav, Kailas, et al., 1999 | 2. K/min; Tstart: 50. C; Tend: 160. C |
| Capillary | OV-101 | 858. | Chupalov and Zenkevich, 1996 | N2, 3. K/min; Column length: 52. m; Column diameter: 0.26 mm; Tstart: 50. C; Tend: 220. C |
| Capillary | OV-101 | 861. | Zenkevich and Kulikova, 1993 | He, 3. K/min; Column length: 54. m; Column diameter: 0.26 mm; Tstart: 50. C; Tend: 230. C |
Normal alkane RI, non-polar column, custom temperature program
| Column type | Active phase | I | Reference | Comment |
|---|---|---|---|---|
| Capillary | OV-1, SE-30, Methyl silicone, SP-2100, OV-101, DB-1, etc. | 862. | Waggott and Davies, 1984 | Hydrogen; Column length: 50. m; Column diameter: 0.32 mm; Program: not specified |
References
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Steele, Chirico, et al., 1990
Steele, W.V.; Chirico, R.D.; Nguyen, A.; Hossenlopp, I.A.; Smith, N.K.,
Determination of ideal-gas enthalpies of formation for key compounds,
Am. Inst. Chem. Eng. Symp. Ser. (AIChE Symp. Ser.), 1990, 138-154. [all data]
Forbes, Shilton, et al., 1964
Forbes, W.F.; Shilton, R.; Balasubramanian, A.,
The ultraviolet absorption spectra of some conjugated dienes,
J. Org. Chem., 1964, 29, 3527-3531. [all data]
Bredael, 1982
Bredael, P.,
Retention indices of hydrocarbons on SE-30,
J. Hi. Res. Chromatogr. Chromatogr. Comm., 1982, 5, 6, 325-328, https://doi.org/10.1002/jhrc.1240050610
. [all data]
Matiella and Hsieh, 1990
Matiella, J.E.; Hsieh, T.C.-Y.,
Analysis of crabmeat volatile compounds,
J. Food Sci., 1990, 55, 4, 962-966, https://doi.org/10.1111/j.1365-2621.1990.tb01575.x
. [all data]
Orav, Kailas, et al., 1999
Orav, A.; Kailas, T.; Muurisepp, M.; Kann, J.,
Composition of the oil from waste tires. 2. Fraction boiling at 160-180 0C,
Proc. Estonian Acad. Sci. Chem., 1999, 48, 3, 136-140. [all data]
Chupalov and Zenkevich, 1996
Chupalov, A.A.; Zenkevich, I.G.,
Chromatographic Characterization of Structural Transformations of Organic Compounds in Diels-Alder Reaction. Aliphatic Dienes and Dienophyls,
Zh. Org. Khim., 1996, 32, 6, 675-684. [all data]
Zenkevich and Kulikova, 1993
Zenkevich, I.G.; Kulikova, S.N.,
GC-MS Analysis of Products of Reactions of Unsaturated Compounds with Dimethyl Disulfide for Determination of Position of Double Bonds C=C,
Vestnik St. Petersburg University. Ser. phys-khim., 1993, 2, 59-69. [all data]
Waggott and Davies, 1984
Waggott, A.; Davies, I.W.,
Identification of organic pollutants using linear temperature programmed retention indices (LTPRIs) - Part II, 1984, retrieved from http://dwi.defra.gov.uk/research/completed-research/reports/dwi0383.pdf. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, Gas Chromatography, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid Tboil Boiling point Tfus Fusion (melting) point ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔvapH° Enthalpy of vaporization at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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