Acenaphthene
- Formula: C12H10
- Molecular weight: 154.2078
- IUPAC Standard InChIKey: CWRYPZZKDGJXCA-UHFFFAOYSA-N
- CAS Registry Number: 83-32-9
- 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. - Isotopologues:
- Other names: Acenaphthylene, 1,2-dihydro-; Peri-Ethylenenaphthalene; Naphthyleneethylene; 1,2-Dihydroacenaphthylene; 1,8-Ethylenenaphthalene; Acenaphtene
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Phase change data
Go To: Top, Gas phase ion energetics 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 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
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 |
---|---|---|---|---|---|
Tboil | 552.2 | K | N/A | Weast and Grasselli, 1989 | BS |
Tboil | 552. | K | N/A | Buckingham and Donaghy, 1982 | BS |
Tboil | 502.65 | K | N/A | Perkin, 1896 | Uncertainty assigned by TRC = 1. K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 367. ± 4. | K | AVG | N/A | Average of 13 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Ttriple | 366.56 | K | N/A | Finke, Messerly, et al., 1977 | Uncertainty assigned by TRC = 0.02 K; TRC |
Ttriple | 366.55 | K | N/A | Osborn and Douslin, 1975 | Uncertainty assigned by TRC = 0.02 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 16.3 | kcal/mol | CGC | Zhao, Unhannanant, et al., 2008 | AC |
ΔvapH° | 16.8 ± 0.26 | kcal/mol | GC | Haftka, Parsons, et al., 2006 | Based on data from 363. to 423. K.; AC |
ΔvapH° | 15.8 | kcal/mol | CGC | Chickos, Hesse, et al., 1998 | AC |
ΔvapH° | 15.8 | kcal/mol | N/A | Ruuzicka, Mokbel, et al., 1998 | See also Hanshaw, Nutt, et al., 2008.; AC |
ΔvapH° | 15.9 ± 0.31 | kcal/mol | N/A | Mokbel, Guetachew, et al., 1995 | See also Hanshaw, Nutt, et al., 2008.; AC |
Quantity | Value | Units | Method | Reference | Comment |
ΔsubH° | 20.3 ± 0.1 | kcal/mol | Review | Roux, Temprado, et al., 2008 | There are sufficient high-quality literature values to make a good evaluation with a high degree of confidence. In general, the evaluated uncertainty limits are on the order of (0.5 to 2.5) kJ/mol.; DRB |
ΔsubH° | 20.2 | kcal/mol | CGC-DSC | Chickos, Hesse, et al., 1998 | AC |
ΔsubH° | 19.9 ± 0.24 | kcal/mol | N/A | Osborn and Douslin, 1975, 2 | See also Finke, Messerly, et al., 1977, 2.; AC |
ΔsubH° | 20.6 ± 0.3 | kcal/mol | V | Boyd, Christensen, et al., 1965 | ALS |
ΔsubH° | 20.6 | kcal/mol | N/A | Boyd, Christensen, et al., 1965 | DRB |
Enthalpy of vaporization
ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
15.3 | 398. | GC | Lei, Chankalal, et al., 2002 | Based on data from 323. to 473. K.; AC |
14.6 | 366. | N/A | Ruuzicka, Mokbel, et al., 1998 | See also Hanshaw, Nutt, et al., 2008.; AC |
14.5 | 378. | N/A | Mokbel, Guetachew, et al., 1995 | See also Hanshaw, Nutt, et al., 2008.; AC |
13. | 403. | A | Stephenson and Malanowski, 1987 | Based on data from 368. to 552. K.; AC |
14.4 | 383. | A | Stephenson and Malanowski, 1987 | Based on data from 368. to 413. K. See also Osborn and Douslin, 1975, 2 and Boublik, Fried, et al., 1984.; AC |
14.7 | 395. | I | Cramer, 1943 | AC |
13.0 | 466. | I | Mortimer and Murphy, 1923 | Based on data from 413. to 561. K.; AC |
13.2 | 435. | N/A | Mortimer and Murphy, 1923 | Based on data from 420. to 561. K. See also Boublik, Fried, et al., 1984.; AC |
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (atm)
T = temperature (K)
View plot Requires a JavaScript / HTML 5 canvas capable browser.
Temperature (K) | A | B | C | Reference | Comment |
---|---|---|---|---|---|
368. to 413. | 4.31665 | 2062.099 | -73.146 | Osborn and Douslin, 1975, 2 | Coefficents calculated by NIST from author's data. |
420.4 to 560.9 | 4.92546 | 2611.29 | -20.227 | Mortimer and Murphy, 1923 | Coefficents calculated by NIST from author's data. |
Enthalpy of sublimation
ΔsubH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
19.9 | 383. | GS | Nass, Lenoir, et al., 1995 | Based on data from 313. to 453. K.; AC |
18.4 | 318. | GS | SATO, INOMATA, et al., 1986 | Based on data from 293. to 342. K.; AC |
20.7 ± 0.2 | 303. | GS | Sonnefeld, Zoller, et al., 1983 | Based on data from 283. to 323. K.; AC |
19.7 | 366. | B | Osborn and Douslin, 1975, 2 | AC |
20.24 ± 0.64 | 283. | V | Radchenko and Kitaigorodskii, 1974 | ALS |
20.6 ± 0.2 | 290. to 340. | ME | Boyd, Christensen, et al., 1965 | See also Cox and Pilcher, 1970.; AC |
19.63 ± 0.10 | 368. | V | Aihara, 1959 | crystal phase; ALS |
19.6 ± 0.1 | 300. | V | Aihara, 1959, 2 | Based on data from 291. to 310. K. See also Stephenson and Malanowski, 1987.; AC |
19.5 | 258. to 308. | N/A | Hoyer and Peperle, 1958 | AC |
Enthalpy of fusion
ΔfusH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
5.12959 | 366.56 | N/A | Finke, Messerly, et al., 1977, 2 | DH |
5.02 | 367. | DSC | Sharma, Gupta, et al., 2008 | AC |
5.129 | 366.6 | N/A | Domalski and Hearing, 1996 | AC |
4.8358 | 366.4 | N/A | Sadowska, Stepniewska, et al., 1969 | DH |
5.9990 | 367.8 | N/A | Eibert, 1944 | DH |
Entropy of fusion
ΔfusS (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
13.99 | 366.56 | Finke, Messerly, et al., 1977, 2 | DH |
13.20 | 366.4 | Sadowska, Stepniewska, et al., 1969 | DH |
16.3 | 367.8 | Eibert, 1944 | DH |
Gas phase ion energetics data
Go To: Top, Phase change 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 evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias
Data compiled as indicated in comments:
B - John E. Bartmess
MM - Michael M. Meot-Ner (Mautner)
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
View reactions leading to C12H10+ (ion structure unspecified)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
IE (evaluated) | 7.75 ± 0.05 | eV | N/A | N/A | L |
Quantity | Value | Units | Method | Reference | Comment |
Proton affinity (review) | 203.6 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 196.2 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Proton affinity at 298K
Proton affinity (kcal/mol) | Reference | Comment |
---|---|---|
203.1 | Aue, Guidoni, et al., 2000 | Experimental literature data re-evaluated by the authors using ab initio protonation entropies; MM |
Gas basicity at 298K
Gas basicity (review) (kcal/mol) | Reference | Comment |
---|---|---|
196.4 | Aue, Guidoni, et al., 2000 | Experimental literature data re-evaluated by the authors using ab initio protonation entropies; MM |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
7.68 ± 0.05 | EQ | Mautner(Meot-Ner), 1980 | LLK |
7.73 ± 0.01 | PE | Dewar, Haselbach, et al., 1970 | RDSH |
7.66 | CTS | Kinoshita, 1962 | RDSH |
7.76 ± 0.03 | PE | Heilbronner, Hoshi, et al., 1976 | Vertical value; LLK |
7.82 ± 0.04 | PE | Boschi, Clar, et al., 1974 | Vertical value; LLK |
De-protonation reactions
C12H9- + =
By formula: C12H9- + H+ = C12H10
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 372.5 ± 2.5 | kcal/mol | TDEq | Meot-ner and Kafafi, 1988 | gas phase; acenaphthene: 1,8-(1,2-ethano)naphthalene; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 365.8 ± 2.0 | kcal/mol | TDEq | Meot-ner and Kafafi, 1988 | gas phase; acenaphthene: 1,8-(1,2-ethano)naphthalene; B |
Mass spectrum (electron ionization)
Go To: Top, Phase change data, 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 by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Spectrum
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Additional Data
View image of digitized spectrum (can be printed in landscape orientation).
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 | NIST Mass Spectrometry Data Center, 1990. |
NIST MS number | 113179 |
References
Go To: Top, Phase change data, Gas phase ion energetics data, Mass spectrum (electron ionization), Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Weast and Grasselli, 1989
CRC Handbook of Data on Organic Compounds, 2nd Editon, Weast,R.C and Grasselli, J.G., ed(s)., CRC Press, Inc., Boca Raton, FL, 1989, 1. [all data]
Buckingham and Donaghy, 1982
Buckingham, J.; Donaghy, S.M.,
Dictionary of Organic Compounds: Fifth Edition, Chapman and Hall, New York, 1982, 1. [all data]
Perkin, 1896
Perkin, W.H.,
LXIX. On Magnetic Rotatory Power, especially of Aromatic Compounds,
J. Chem. Soc., 1896, 69, 1025-1257. [all data]
Finke, Messerly, et al., 1977
Finke, H.L.; Messerly, J.F.; Lee, S.H.; Osborn, A.G.; Douslin, D.R.,
Comprehensive thermodynamic studies of seven aromatic hydrocarbons,
J. Chem. Thermodyn., 1977, 9, 937. [all data]
Osborn and Douslin, 1975
Osborn, A.G.; Douslin, D.R.,
Vapor Pressure and Derived Enthalpies of Vaporization for Some Condensed Ring Hydrocarbons,
J. Chem. Eng. Data, 1975, 20, 229-31. [all data]
Zhao, Unhannanant, et al., 2008
Zhao, Hui; Unhannanant, Patamaporn; Hanshaw, William; Chickos, James S.,
Enthalpies of Vaporization and Vapor Pressures of Some Deuterated Hydrocarbons. Liquid-Vapor Pressure Isotope Effects,
J. Chem. Eng. Data, 2008, 53, 7, 1545-1556, https://doi.org/10.1021/je800091s
. [all data]
Haftka, Parsons, et al., 2006
Haftka, Joris J.H.; Parsons, John R.; Govers, Harrie A.J.,
Supercooled liquid vapour pressures and related thermodynamic properties of polycyclic aromatic hydrocarbons determined by gas chromatography,
Journal of Chromatography A, 2006, 1135, 1, 91-100, https://doi.org/10.1016/j.chroma.2006.09.050
. [all data]
Chickos, Hesse, et al., 1998
Chickos, James; Hesse, Donald; Hosseini, Sarah; Nichols, Gary; Webb, Paul,
Sublimation enthalpies at 298.15K using correlation gas chromatography and differential scanning calorimetry measurements,
Thermochimica Acta, 1998, 313, 2, 101-110, https://doi.org/10.1016/S0040-6031(97)00432-2
. [all data]
Ruuzicka, Mokbel, et al., 1998
Ruuzicka, Kvetoslav; Mokbel, Ilham; Majer, Vladimir; Ruuzicka, Vlastimil; Jose, Jacques; Zábranský, Milan,
Description of vapour--liquid and vapour--solid equilibria for a group of polycondensed compounds of petroleum interest,
Fluid Phase Equilibria, 1998, 148, 1-2, 107-137, https://doi.org/10.1016/S0378-3812(98)00200-3
. [all data]
Hanshaw, Nutt, et al., 2008
Hanshaw, William; Nutt, Marjorie; Chickos, James S.,
Hypothetical Thermodynamic Properties. Subcooled Vaporization Enthalpies and Vapor Pressures of Polyaromatic Hydrocarbons,
J. Chem. Eng. Data, 2008, 53, 8, 1903-1913, https://doi.org/10.1021/je800300x
. [all data]
Mokbel, Guetachew, et al., 1995
Mokbel, I.; Guetachew, T.; Jose, J.,
Vapor pressures and sublimation pressures of 14 polycyclic aromatic hydrocarbons (C11 - C18) at pressures in the range from 0.5 Pa to 30 kPa,
ELDATA: Int. Electron. J. Phys. Chem. Data, 1995, 1, 2, 167. [all data]
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]
Osborn and Douslin, 1975, 2
Osborn, Ann G.; Douslin, Donald R.,
Vapor pressures and derived enthalpies of vaporization for some condensed-ring hydrocarbons,
J. Chem. Eng. Data, 1975, 20, 3, 229-231, https://doi.org/10.1021/je60066a022
. [all data]
Finke, Messerly, et al., 1977, 2
Finke, H.L.; Messerly, J.F.; Lee, S.H.; Osborn, A.G.; Douslin, D.R.,
Comprehensive thermodynamic studies of seven aromatic hydrocarbons,
J. Chem. Thermodyn., 1977, 9, 937-956. [all data]
Boyd, Christensen, et al., 1965
Boyd, R.H.; Christensen, R.L.; Pua, R.,
The heats of combustion of acenaphthene, acenaphthylene, and fluoranthene. Strain and delocalization in bridged naphthalenes,
J. Am. Chem. Soc., 1965, 87, 3554-3559. [all data]
Lei, Chankalal, et al., 2002
Lei, Ying Duan; Chankalal, Raymond; Chan, Anita; Wania, Frank,
Supercooled Liquid Vapor Pressures of the Polycyclic Aromatic Hydrocarbons,
J. Chem. Eng. Data, 2002, 47, 4, 801-806, https://doi.org/10.1021/je0155148
. [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]
Boublik, Fried, et al., 1984
Boublik, T.; Fried, V.; Hala, E.,
The Vapour Pressures of Pure Substances: Selected Values of the Temperature Dependence of the Vapour Pressures of Some Pure Substances in the Normal and Low Pressure Region, 2nd ed., Elsevier, New York, 1984, 972. [all data]
Cramer, 1943
Cramer, K.S.N.,
Chem. Zentr. II, 1943, 2234. [all data]
Mortimer and Murphy, 1923
Mortimer, F. Spencer.; Murphy, Ray v.,
The Vapor Pressures of Some Substances Found in Coal Tar.,
Ind. Eng. Chem., 1923, 15, 11, 1140-1142, https://doi.org/10.1021/ie50167a012
. [all data]
Nass, Lenoir, et al., 1995
Nass, Karen; Lenoir, Dieter; Kettrup, Antonius,
Calculation of the Thermodynamic Properties of Polycyclic Aromatic Hydrocarbons by an Incremental Procedure,
Angew. Chem. Int. Ed. Engl., 1995, 34, 16, 1735-1736, https://doi.org/10.1002/anie.199517351
. [all data]
SATO, INOMATA, et al., 1986
SATO, NOBUYUKI; INOMATA, HIROSHI; ARAI, KUNIO; SAITO, SHOZABURO,
Measurement of vapor pressures for coal-related aromatic compounds by gas saturation method.,
J. Chem. Eng. Japan / JCEJ, 1986, 19, 2, 145-147, https://doi.org/10.1252/jcej.19.145
. [all data]
Sonnefeld, Zoller, et al., 1983
Sonnefeld, W.J.; Zoller, W.H.; May, W.E.,
Dynamic coupled-column liquid-chromatographic determination of ambient-temperature vapor pressures of polynuclear aromatic hydrocarbons,
Anal. Chem., 1983, 55, 2, 275-280, https://doi.org/10.1021/ac00253a022
. [all data]
Radchenko and Kitaigorodskii, 1974
Radchenko, L.G.; Kitaigorodskii, A.I.,
The vapour pressures and heats of sublimation of naphthalene, biphenyl, octafluoronaphthalene, decafluorobiphenyl, acenaphthene and α-nitronaphthalene,
Russ. J. Phys. Chem. (Engl. Transl.), 1974, 48, 1595. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press Inc., London, 1970, 643. [all data]
Aihara, 1959
Aihara, A.,
Estimation of the energy of hydrogen bonds formed in crystals. I. Sublimation pressures of some organic molecular crystals and the additivity of lattice energy,
Bull. Chem. Soc. Jpn., 1959, 32, 1242. [all data]
Aihara, 1959, 2
Aihara, Ariyuki,
Estimation of the Energy of Hydrogen Bonds Formed in Crystals. I. Sublimation Pressures of Some Organic Molecular Crystals and the Additivity of Lattice Energy,
Bull. Chem. Soc. Jpn., 1959, 32, 11, 1242-1248, https://doi.org/10.1246/bcsj.32.1242
. [all data]
Hoyer and Peperle, 1958
Hoyer, H.; Peperle, W.,
Z. Elektrochem., 1958, 62, 61. [all data]
Sharma, Gupta, et al., 2008
Sharma, B.L.; Gupta, S.; Tandon, S.; Kant, R.,
Physico-mechanical properties of naphthalene--acenaphthene eutectic system by different modes of solidification,
Materials Chemistry and Physics, 2008, 111, 2-3, 423-430, https://doi.org/10.1016/j.matchemphys.2008.04.049
. [all data]
Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D.,
Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III,
J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985
. [all data]
Sadowska, Stepniewska, et al., 1969
Sadowska, K.W.; Stepniewska, G.B.; Recko, W.M.,
Specific heat and enthalpy of fusion of acenaphthene and acenaphthylene,
Przem. Chem., 1969, 48, 282-285. [all data]
Eibert, 1944
Eibert, J.,
Thesis Washington University (St. Louis), 1944. [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]
Aue, Guidoni, et al., 2000
Aue, D.H.; Guidoni, M.; Betowski, L.D.,
Ab initio calculated gas-phase basicities of polynuclear aromatic hydrocarbons,
Int. J. Mass Spectrom., 2000, 201, 283. [all data]
Mautner(Meot-Ner), 1980
Mautner(Meot-Ner), M.,
Ion thermochemistry of low volatility compounds in the gas phase. 3. Polycyclic aromatics: Ionization energies, proton, and hydrogen affinities. Extrapolations to graphite,
J. Phys. Chem., 1980, 84, 2716. [all data]
Dewar, Haselbach, et al., 1970
Dewar, M.J.S.; Haselbach, E.; Worley, S.D.,
Calculated and observed ionization potentials of unsaturated polycyclic hydrocarbons; calculated heats of formation by several semiempirical s.c.f. m.o. methods,
Proc. Roy. Soc. (London), 1970, A315, 431. [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]
Heilbronner, Hoshi, et al., 1976
Heilbronner, E.; Hoshi, T.; von Rosenberg, J.L.; Hafner, K.,
Alkyl-induced, natural hypsochromic shifts of the 2A←2X and 2B←2X transitions of azulene and naphthalene radical cations,
Nouv. J. Chim., 1976, 1, 105. [all data]
Boschi, Clar, et al., 1974
Boschi, R.; Clar, E.; Schmidt, W.,
Photoelectron spectra of polynuclear aromatics. III. The effect of nonplanarity in sterically overcrowded aromatic hydrocarbons,
J. Chem. Phys., 1974, 60, 4406. [all data]
Meot-ner and Kafafi, 1988
Meot-ner, M.; Kafafi, S.A.,
Carbon Acidities of Aromatic Compounds,
J. Am. Chem. Soc., 1988, 110, 19, 6297, https://doi.org/10.1021/ja00227a003
. [all data]
Notes
Go To: Top, Phase change data, Gas phase ion energetics data, Mass spectrum (electron ionization), References
- Symbols used in this document:
IE (evaluated) Recommended ionization energy Tboil Boiling point Tfus Fusion (melting) point Ttriple Triple point temperature ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔsubH Enthalpy of sublimation ΔsubH° Enthalpy of sublimation at standard conditions ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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