trans-β-Methylstyrene
- Formula: C9H10
- Molecular weight: 118.1757
- IUPAC Standard InChIKey: QROGIFZRVHSFLM-QHHAFSJGSA-N
- CAS Registry Number: 873-66-5
- 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. - Stereoisomers:
- Other names: (E)- β-Methylstyrene; trans-Propenylbenzene; Benzene, 1-propenyl-, (E)-; (E)-1-Propenyl benzene
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Phase change data
Go To: Top, Gas phase ion energetics data, References, Notes
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
AC - William E. Acree, Jr., James S. Chickos
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 450. ± 3. | K | AVG | N/A | Average of 7 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 246.65 | K | N/A | Park and Wright, 1954 | Uncertainty assigned by TRC = 1. K; TRC |
Tfus | 243.23 | K | N/A | Anonymous, 1953 | Uncertainty assigned by TRC = 0.2 K; TRC |
Tfus | 243.82 | K | N/A | Anonymous, 1953 | Uncertainty assigned by TRC = 0.15 K; TRC |
Tfus | 243.08 | K | N/A | Anonymous, 1952 | Uncertainty assigned by TRC = 0.5 K; TRC |
Tfus | 242.15 | K | N/A | Lespieau, 1930 | Uncertainty assigned by TRC = 4. K; cis-trans isomer not identified, but m.p. corr. approx. to cis-; TRC |
Enthalpy of vaporization
ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
11.1 | 306. | A | Stephenson and Malanowski, 1987 | Based on data from 291. to 452. K. See also Stull, 1947.; AC |
Gas phase ion energetics data
Go To: Top, Phase change data, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
Data compiled as indicated in comments:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
View reactions leading to C9H10+ (ion structure unspecified)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Proton affinity (review) | 199.4 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 192.5 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
8.1 | PE | Kobayashi, Arai, et al., 1981 | LLK |
8.20 ± 0.02 | PE | Maier and Turner, 1973 | LLK |
7.84 ± 0.04 | EI | Benito, Seidl, et al., 1973 | LLK |
8.34 | PE | Kobayashi, Arai, et al., 1981 | Vertical value; LLK |
8.32 | PE | Salisbury, 1974 | Vertical value; LLK |
References
Go To: Top, Phase change data, Gas phase ion energetics data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Park and Wright, 1954
Park, W.R.R.; Wright, G.F.,
J. Org. Chem., 1954, 19, 1435. [all data]
Anonymous, 1953
Anonymous, R.,
, Physical Properties of Chemical Substances, Dow Chemical Company, 1953. [all data]
Anonymous, 1952
Anonymous, R.,
, Physical Properties of Chemical Substances, Dow Chemical Co., 1952. [all data]
Lespieau, 1930
Lespieau, R.,
Preparation of the β Dibromides of Trimethylenic Hydrocarbons,
Bull. Soc. Chim. Fr., 1930, 47, 847. [all data]
Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw,
Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2
. [all data]
Stull, 1947
Stull, Daniel R.,
Vapor Pressure of Pure Substances. Organic and Inorganic Compounds,
Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022
. [all data]
Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G.,
Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update,
J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018
. [all data]
Kobayashi, Arai, et al., 1981
Kobayashi, T.; Arai, T.; Sakuragi, H.; Tokumaru, K.; Utsunomiya, C.,
A new nethod for conformational analysis by photoelectron spectroscopy with application to alkyl-substituted styrenes,
Bull. Chem. Soc. Jpn., 1981, 54, 1658. [all data]
Maier and Turner, 1973
Maier, J.P.; Turner, D.W.,
Steric inhibition of resonance studied by molecular photoelectron spectroscopy. Part 2. Phenylethylenes,
J. Chem. Soc. Faraday Trans. 2, 1973, 69, 196. [all data]
Benito, Seidl, et al., 1973
Benito, I.; Seidl, H.; Bock, H.,
Efectos electronicos y estericos de sustituyentes alquilicos y silicicos sobre el sistema electronico π del estireno,
Rev. Fac. Cienc. Univ. Oviedo, 1973, 14, 95. [all data]
Salisbury, 1974
Salisbury, K.,
Quenching of the fluorescence of styrenes by ground state oxygen,
J. Photochem., 1974, 2, 401. [all data]
Notes
Go To: Top, Phase change data, Gas phase ion energetics data, References
- Symbols used in this document:
Tboil Boiling point Tfus Fusion (melting) point ΔvapH Enthalpy of vaporization - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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