Benz[a]anthracene
- Formula: C18H12
- Molecular weight: 228.2879
- IUPAC Standard InChIKey: DXBHBZVCASKNBY-UHFFFAOYSA-N
- CAS Registry Number: 56-55-3
- 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: Benzanthracene; Benzanthrene; Benzoanthracene; Benzo[a]anthracene; Benzo[b]phenanthrene; Tetraphene; 1,2-Benzanthracene; 1,2-Benzanthrene; 1,2-Benzoanthracene; 1,2-Benz[a]anthracene; 2,3-Benzophenanthrene; BA; 1,2-Benzanthrazen; 2,3-Benzphenanthrene; Rcra waste number U018; NSC 30970
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Condensed phase thermochemistry 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:
DRB - Donald R. Burgess, Jr.
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°solid | 40.82 ± 0.79 | kcal/mol | Review | Roux, Temprado, et al., 2008 | There are insufficient literature values to properly evaluate the data and insufficient information to construct thermochemical cycles or estimate values for comparison, and one must rely solely upon reported uncertainities and the quality of the measurements. In general, the evaluated uncertainty limits are on the order of (3 to 9) kJ/mol.; DRB |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°solid | -2143.64 ± 0.56 | kcal/mol | Ccb | Magnus, Hartmann, et al., 1951 | Reanalyzed by Cox and Pilcher, 1970, Original value = -2143.74 ± 0.56 kcal/mol; Corresponding ΔfHºsolid = 40.83 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
Constant pressure heat capacity of solid
Cp,solid (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
65.39 | 298.15 | Ueberreiter and Orthmann, 1950 | T = 293 to 368 K. Equation only.; DH |
Gas phase ion energetics data
Go To: Top, Condensed phase thermochemistry 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:
L - Sharon G. Lias
Data compiled as indicated in comments:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess
View reactions leading to C18H12+ (ion structure unspecified)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
IE (evaluated) | 7.45 ± 0.05 | eV | N/A | N/A | L |
Electron affinity determinations
EA (eV) | Method | Reference | Comment |
---|---|---|---|
0.39 ± 0.10 | CIDC | Chen and Cooks, 1995 | B |
0.6300 ± 0.0080 | ECD | Becker and Chen, 1966 | B |
0.460008 | ECD | Wentworth and Becker, 1962 | B |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
7.5 ± 0.3 | EI | Wacks, 1964 | RDSH |
7.52 | CTS | Kuroda, 1964 | RDSH |
7.53 | CTS | Briegleb, 1964 | RDSH |
7.56 | CTS | Kinoshita, 1962 | RDSH |
7.5 | CTS | Briegleb, Czekalla, et al., 1961 | RDSH |
7.45 | CTS | Birks and Stifkin, 1961 | RDSH |
7.6 | CTS | Briegleb and Czekalla, 1959 | RDSH |
7.35 | CTS | Matsen, 1956 | RDSH |
7.46 ± 0.03 | PE | Akiyama, Harvey, et al., 1981 | Vertical value; LLK |
7.41 ± 0.02 | PE | Schmidt, 1977 | Vertical value; LLK |
7.41 | PE | Clar and Schmidt, 1976 | Vertical value; LLK |
7.56 ± 0.01 | PE | Dewar and Goodman, 1972 | Vertical value; LLK |
7.42 | PE | Brogli and Heilbronner, 1972 | Vertical value; LLK |
7.47 ± 0.01 | PE | Boschi, Murrell, et al., 1972 | Vertical value; LLK |
References
Go To: Top, Condensed phase thermochemistry 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.
Roux, Temprado, et al., 2008
Roux, M.V.; Temprado, M.; Chickos, J.S.; Nagano, Y.,
Critically Evaluated Thermochemical Properties of Polycyclic Aromatic Hydrocarbons,
J. Phys. Chem. Ref. Data, 2008, 37, 4, 1855-1996. [all data]
Magnus, Hartmann, et al., 1951
Magnus, A.; Hartmann, H.; Becker, F.,
Verbrennungswarmen und resonanzenergien von mehrkernigen aromatischen kohlenwasserstoffen,
Z. Phys. Chem., 1951, 197, 75-91. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]
Ueberreiter and Orthmann, 1950
Ueberreiter, K.; Orthmann, H.-J.,
Specifische Wärme, spezifisches Volumen, Temperatur- und Wärme-leittähigkeit einiger disubstituierter Benzole und polycyclischer Systeme,
Z. Natursforsch. 5a, 1950, 101-108. [all data]
Chen and Cooks, 1995
Chen, G.D.; Cooks, R.G.,
Electron affinities of polycyclic aromatic hydrocarbons determined by the kinetic method,
J. Mass Spectrom., 1995, 30, 8, 1167, https://doi.org/10.1002/jms.1190300814
. [all data]
Becker and Chen, 1966
Becker, R.S.; Chen, E.,
Extension of Electron Affinities and Ionization Potentials of Aromatic Hydrocarbons,
J. Chem. Phys., 1966, 45, 7, 2403, https://doi.org/10.1063/1.1727954
. [all data]
Wentworth and Becker, 1962
Wentworth, W.E.; Becker, R.S.,
Potential Method for the Determination of Electron Affinities of Molecules: Application to Some Aromatic Hydrocarbons.,
J. Am. Chem. Soc., 1962, 84, 22, 4263, https://doi.org/10.1021/ja00881a014
. [all data]
Wacks, 1964
Wacks, M.E.,
Electron-impact studies of aromatic hydrocarbons. II. Naphthacene, naphthaphene, chrysene, triphenylene, and pyrene,
J. Chem. Phys., 1964, 41, 1661. [all data]
Kuroda, 1964
Kuroda, H.,
Ionization potentials of polycyclic aromatic hydrocarbons,
Nature, 1964, 201, 1214. [all data]
Briegleb, 1964
Briegleb, G.,
Electron affinity of organic molecules,
Angew. Chem. Intern. Ed., 1964, 3, 617. [all data]
Kinoshita, 1962
Kinoshita, M.,
The absorption spectra of the molecular complexes of aromatic compounds with p-bromanil,
Bull. Chem. Soc. Japan, 1962, 35, 1609. [all data]
Briegleb, Czekalla, et al., 1961
Briegleb, G.; Czekalla, J.; Reuss, G.,
Mesomeriemomente und Elektronenuberfuhrungsbanden von Elektronen-donator-akzeptor-komplexen des Chloranils und Tetracyanathylens mit aromatischen Kohlenwasserstoffen,
Z. Phys. Chem. (Neue Folge), 1961, 30, 333. [all data]
Birks and Stifkin, 1961
Birks, J.B.; Stifkin, M.A.,
π-Electronic excitation and ionization energies of condensed ring aromatic hydrocarbons,
Nature, 1961, 191, 761. [all data]
Briegleb and Czekalla, 1959
Briegleb, G.; Czekalla, J.,
Die Bestimmung von lonisierungsenergien aus den Spektren von Elektronenubergangskomplexen,
Z.Elektrochem., 1959, 63, 6. [all data]
Matsen, 1956
Matsen, F.A.,
Electron affinities, methyl affinities, and ionization energies of condensed ring aromatic hydrocarbons,
J. Chem. Phys., 1956, 24, 602. [all data]
Akiyama, Harvey, et al., 1981
Akiyama, I.; Harvey, R.G.; LeBreton, P.R.,
Ultraviolet photoelectron studies of methyl-substituted benz[a]anthracenes,
J. Am. Chem. Soc., 1981, 103, 6330. [all data]
Schmidt, 1977
Schmidt, W.,
Photoelectron spectra of polynuclear aromatics. V. Correlations with ultraviolet absorption spectra in the catacondensed series,
J. Chem. Phys., 1977, 66, 828. [all data]
Clar and Schmidt, 1976
Clar, E.; Schmidt, W.,
Correlations between photoelectron and phosphorescence spectra of polycyclic hydrocarbons,
Tetrahedron, 1976, 32, 2563. [all data]
Dewar and Goodman, 1972
Dewar, M.J.S.; Goodman, D.W.,
Photoelectron spectra of molecules. Part 5.--Polycyclic aromatic hydrocarbons,
J. Chem. Soc. Faraday Trans. 2, 1972, 68, 1784. [all data]
Brogli and Heilbronner, 1972
Brogli, F.; Heilbronner, E.,
The photoelectron spectra of benzenoid hydrocarbons C18H12,
Angew. Chem. Int. Ed. Engl., 1972, 11, 538. [all data]
Boschi, Murrell, et al., 1972
Boschi, R.; Murrell, J.N.; Schmidt, W.,
Photoelectron spectra of polycyclic aromatic hydrocarbons,
Faraday Discuss. Chem. Soc., 1972, 54, 116. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid EA Electron affinity IE (evaluated) Recommended ionization energy ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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