α-Methylstyrene
- Formula: C9H10
- Molecular weight: 118.1757
- IUPAC Standard InChIKey: XYLMUPLGERFSHI-UHFFFAOYSA-N
- CAS Registry Number: 98-83-9
- 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: Benzene, (1-methylethenyl)-; Styrene, α-methyl-; α-Methylstyrol; β-Phenylpropylene; Isopropenylbenzene; 1-Methyl-1-phenylethylene; 1-Phenyl-1-methylethylene; 1-Propene, 2-phenyl-; 2-Phenyl-1-propene; 2-Phenylpropene; (1-Methylethenyl)benzene; AS-Methylphenylethylene; β-phenylpropene; α-Methylstyreen; α-Metil-stirolo; Isopropenil-benzolo; Isopropenyl-benzeen; Isopropenyl-benzol; 2-Phenylpropylene; UN 2303; Benzene, isopropenyl-; 2-Phenyl-2-propene; 1-Methyl-1-phenylethene; NSC 9400; a-methylstyrene
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Reaction thermochemistry data
Go To: Top, Mass spectrum (electron ionization), UV/Visible spectrum, 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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
B - John E. Bartmess
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Individual Reactions
By formula: HCl + C9H10 = C9H11Cl
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -8.80 ± 0.45 | kcal/mol | Cm | Arnett and Pienta, 1980 | liquid phase; solvent: Methylene chloride; Hydrochlorination; ALS |
ΔrH° | -12.4 ± 1.1 | kcal/mol | Cm | Nesterova, Kovzel, et al., 1977 | liquid phase; Hydrochlorination; ALS |
C9H9- + =
By formula: C9H9- + H+ = C9H10
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 385.6 ± 5.6 | kcal/mol | G+TS | Bartmess and Burnham, 1984 | gas phase; between H2O, MeOH; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 379.0 ± 5.5 | kcal/mol | IMRB | Bartmess and Burnham, 1984 | gas phase; between H2O, MeOH; B |
By formula: H2 + C9H10 = C9H12
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -26.60 ± 0.50 | kcal/mol | Chyd | Abboud, Jimenez, et al., 1995 | liquid phase; solvent: Hyrocarbon; Like gas phase; ALS |
By formula: HBr + C9H10 = C9H11Br
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -15.2 ± 1.3 | kcal/mol | Cm | Nesterova, Kovzel, et al., 1977 | liquid phase; Hydrobromination; ALS |
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
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. |
---|---|
Origin | Japan AIST/NIMC Database- Spectrum MS-NW-2072 |
NIST MS number | 229186 |
UV/Visible spectrum
Go To: Top, Reaction thermochemistry data, Mass spectrum (electron ionization), References, Notes
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 | Beaven and Johnson, 1957 |
---|---|
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. 4639 |
Instrument | Unicam SP 500 |
Melting point | -23.2 |
Boiling point | 165.4 |
References
Go To: Top, Reaction thermochemistry data, Mass spectrum (electron ionization), UV/Visible spectrum, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Arnett and Pienta, 1980
Arnett, E.M.; Pienta, N.J.,
Stabilities of carbonium ions in solution. 12. Heats of formation of alkyl chlorides as an entree to heats of solvation of aliphatic carbonium ions,
J. Am. Chem. Soc., 1980, 102, 3329-3334. [all data]
Nesterova, Kovzel, et al., 1977
Nesterova, T.N.; Kovzel, E.N.; Karaseva, S.Ya.; Rozhnov, A.M.,
Heats of reaction of the hydrohalogenation of styrene and α-methylstyrene,
Vses. Konf. Kalorim. Rasshir. Tezisy Dokl. 7th, 1977, 1, 132. [all data]
Bartmess and Burnham, 1984
Bartmess, J.E.; Burnham, R.,
Effect of central substituents on the gas phase acidities of propenes,
J. Org. Chem., 1984, 49, 1382. [all data]
Abboud, Jimenez, et al., 1995
Abboud, J.-L.M.; Jimenez, P.; Roux, M.V.; Turrion, C.; Lopez-Mardomingo, C.; Podosenin, A.; Rogers, D.W.; Liebman, J.F.,
Interrelations of the energetics of amides and alkenes: enthalpies of formation of N,N-dimethyl dertivatives of pivalamide, 1-adamantylcarboxamide and benzamide, and of styrene and its a-, trans-β- and β,β-methylated derivates,
J. Phys. Org. Chem., 1995, 8, 15-25. [all data]
Beaven and Johnson, 1957
Beaven, G.H.; Johnson, E.A.,
The relation between configuration and conjugation in diphenyl derivatives. Part VIII. Some compounds derived from 2:2'-di-acetyldiphenyl,
J. Chem. Soc., 1957, 651-658. [all data]
Notes
Go To: Top, Reaction thermochemistry data, Mass spectrum (electron ionization), UV/Visible spectrum, References
- Symbols used in this document:
ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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