Anthracene, 9,10-dihydro-
- Formula: C14H12
- Molecular weight: 180.2451
- IUPAC Standard InChIKey: WPDAVTSOEQEGMS-UHFFFAOYSA-N
- CAS Registry Number: 613-31-0
- 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: Anthracene, dihydro-; 9,10-Dihydroanthracene; para-hydroanthracene
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Gas phase thermochemistry data
Go To: Top, Phase change data, IR Spectrum, Mass spectrum (electron ionization), Gas Chromatography, 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: Glushko Thermocenter, Russian Academy of Sciences, Moscow
Constant pressure heat capacity of gas
Cp,gas (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
10.82 | 50. | Dorofeeva O.V., 1988 | Recommended values were calculated statistically mechanically using force field approximation for polycyclic aromatic hydrocarbons to estimate the needed vibrational frequencies (see also [ Dorofeeva O.V., 1986]). These functions are reproduced in the reference book [ Frenkel M., 1994]. |
15.81 | 100. | ||
22.26 | 150. | ||
29.730 | 200. | ||
41.790 | 273.15 | ||
46.01 ± 0.48 | 298.15 | ||
46.326 | 300. | ||
62.452 | 400. | ||
76.178 | 500. | ||
87.306 | 600. | ||
96.298 | 700. | ||
103.65 | 800. | ||
109.73 | 900. | ||
114.82 | 1000. | ||
119.10 | 1100. | ||
122.74 | 1200. | ||
125.83 | 1300. | ||
128.49 | 1400. | ||
130.77 | 1500. |
Phase change data
Go To: Top, Gas phase thermochemistry data, IR Spectrum, Mass spectrum (electron ionization), Gas Chromatography, 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
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 | 585.2 | K | N/A | Aldrich Chemical Company Inc., 1990 | BS |
Tboil | 578.2 | K | N/A | Weast and Grasselli, 1989 | BS |
Quantity | Value | Units | Method | Reference | Comment |
Ttriple | 382.18 | K | N/A | Chirico, Hossenlopp, et al., 1987 | Uncertainty assigned by TRC = 0.01 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔsubH° | 22.5 ± 0.2 | kcal/mol | ME | Malaspina, Gigli, et al., 1975 | AC |
Reduced pressure boiling point
Tboil (K) | Pressure (atm) | Reference | Comment |
---|---|---|---|
440.7 | 0.017 | Weast and Grasselli, 1989 | BS |
Enthalpy of sublimation
ΔsubH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
22.4 | 383. | GS | Nass, Lenoir, et al., 1995 | Based on data from 313. to 453. K.; AC |
22.1 ± 1. | 318. to 379. | ME | Malaspina, Gigli, et al., 1975 | See also Stephenson and Malanowski, 1987.; AC |
22.3 ± 1. | 304. | N/A | Hoyer and Peperle, 1958 | Based on data from 279. to 328. K. See also Cox and Pilcher, 1970.; AC |
22.3 ± 1.0 | 279. | V | Hoyer and Peperle, 1958, 2 | Reanalyzed by Pedley, Naylor, et al., 1986, Original value = 21.7 kcal/mol; ALS |
21.4 | 388. | N/A | Magnus, Hartman, et al., 1951 | See also Jones, 1960.; AC |
21.4 | 293. | V | Magnus, Hartmann, et al., 1951 | ALS |
Enthalpy of fusion
ΔfusH (kcal/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
5.6979 | 382.18 | Chirico, Hossenlopp, et al., 1987, 2 | DH |
Entropy of fusion
ΔfusS (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
14.91 | 382.18 | Chirico, Hossenlopp, et al., 1987, 2 | DH |
IR Spectrum
Go To: Top, Gas phase thermochemistry data, Phase change data, Mass spectrum (electron ionization), Gas Chromatography, References, Notes
Data compiled by: Coblentz Society, Inc.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Mass spectrum (electron ionization)
Go To: Top, Gas phase thermochemistry data, Phase change data, IR Spectrum, Gas Chromatography, 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
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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-1882 |
NIST MS number | 228367 |
Gas Chromatography
Go To: Top, Gas phase thermochemistry data, Phase change data, IR Spectrum, 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: 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 | OV-1 | 160. | 1652. | Zhang, Chen, et al., 1997 | 25. m/0.2 mm/0.33 μm, N2 |
Capillary | SE-30 | 130. | 1622. | Bredael, 1982 | Column length: 100. m; Column diameter: 0.5 mm |
Capillary | SE-30 | 175. | 1667. | Bredael, 1982 | Column length: 100. m; Column diameter: 0.5 mm |
Kovats' RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Packed | SE-30 | 1662. | Ramsey, Lee, et al., 1980 | He, Chromosorb G HP (80-100 mesh); Column length: 1.5 m; Program: not specified |
Van Den Dool and Kratz RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-5 | 1676.6 | Song, Lai, et al., 2003 | 30. m/0.25 mm/0.25 μm, He, 4. K/min; Tstart: 40. C; Tend: 310. C |
Capillary | DB-5 | 1676.2 | Song, Lai, et al., 2003 | 30. m/0.25 mm/0.25 μm, He, 40. C @ 5. min, 4. K/min; Tend: 310. C |
Capillary | DB-5 | 1662.1 | Song, Lai, et al., 2003 | 30. m/0.25 mm/0.25 μm, He, 2. K/min; Tstart: 40. C; Tend: 310. C |
Capillary | DB-5 | 1676.6 | Song, Lai, et al., 2003 | 30. m/0.25 mm/0.25 μm, He, 4. K/min; Tstart: 40. C; Tend: 310. C |
Capillary | DB-5 | 1685.3 | Song, Lai, et al., 2003 | 30. m/0.25 mm/0.25 μm, He, 6. K/min; Tstart: 40. C; Tend: 310. C |
Capillary | OV-1 | 1669.6 | Zhang, Shen, et al., 2000 | 25. m/0.2 mm/0.33 μm, 5. K/min; Tstart: 100. C; Tend: 180. C |
Capillary | OV-1 | 1686.1 | Zhang, Shen, et al., 2000 | 25. m/0.2 mm/0.33 μm, 5. K/min; Tstart: 100. C; Tend: 180. C |
Capillary | DB-5 | 1662.1 | Lai and Song, 1995 | 30. m/0.25 mm/0.25 μm, He, 2. K/min; Tstart: 40. C; Tend: 310. C |
Capillary | DB-5 | 1676.6 | Lai and Song, 1995 | 30. m/0.25 mm/0.25 μm, He, 4. K/min; Tstart: 40. C; Tend: 310. C |
Capillary | DB-5 | 1685.3 | Lai and Song, 1995 | 30. m/0.25 mm/0.25 μm, He, 6. K/min; Tstart: 40. C; Tend: 310. C |
Capillary | DB-5 | 1676.6 | Lai and Song, 1995 | 30. m/0.25 mm/0.25 μm, He, 4. K/min; Tstart: 40. C; Tend: 310. C |
Capillary | DB-5 | 1676.2 | Lai and Song, 1995 | 30. m/0.25 mm/0.25 μm, He, 40. C @ 5. min, 4. K/min; Tend: 310. C |
Capillary | DB-5 | 1688. | Rostad and Pereira, 1986 | 30. m/0.26 mm/0.25 μm, He, 50. C @ 4. min, 6. K/min, 300. C @ 20. min |
Normal alkane RI, non-polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Packed | Polydimethyl siloxane | 183. | 1672. | Ferrand, 1962 |
Normal alkane RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Ultra-1 | 1649. | Elizalde-González, Hutfliess, et al., 1996 | 50. m/0.2 mm/0.33 μm, H2, 3. K/min, 300. C @ 35. min; Tstart: 60. C |
Capillary | Ultra-1 | 1622. | Okumura, 1991 | 25. m/0.32 mm/0.25 μm, He, 3. K/min; Tstart: 80. C; Tend: 260. 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. | 1662. | Waggott and Davies, 1984 | Hydrogen; Column length: 50. m; Column diameter: 0.32 mm; Program: not specified |
Other | Methyl Silicone | 1662. | Ardrey and Moffat, 1981 | Program: not specified |
Lee's RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | HP-5 | 287.5 | Wang, Hou, et al., 2007 | 30. m/0.30 mm/0.25 μm, Helium, 50. C @ 5. min, 5. K/min, 200. C @ 15. min |
Capillary | DB-5 | 285.6 | Durlak, Biswas, et al., 1998 | 30. m/0.25 mm/0.25 μm, 15. K/min; Tstart: 50. C; Tend: 300. C |
Capillary | SE-54 | 284.99 | Guillén, Blanco, et al., 1989 | 20. m/0.22 mm/0.20 μm, He, 4. K/min; Tstart: 50. C; Tend: 300. C |
Capillary | DB-5 | 284.78 | Rostad and Pereira, 1986 | 30. m/0.26 mm/0.25 μm, He, 50. C @ 4. min, 6. K/min, 300. C @ 20. min |
Capillary | SE-52 | 284.89 | Lee, Vassilaros, et al., 1979 | 12. m/0.3 mm/0.34 μm, He, 2. K/min; Tstart: 50. C; Tend: 250. C |
Lee's RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-5 | 287.9 | Fuentes, Font, et al., 2007 | Column length: 60. m; Program: not specified |
Capillary | SE-54 | 284.15 | Guillen, Iglesias, et al., 1992 | Program: not specified |
Capillary | SE-52 | 284.99 | Shlyakhov, 1984 | Program: not specified |
References
Go To: Top, Gas phase thermochemistry data, Phase change data, IR Spectrum, Mass spectrum (electron ionization), Gas Chromatography, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Dorofeeva O.V., 1988
Dorofeeva O.V.,
Thermodynamic Properties of Polycyclic Aromatic Hydrocarbons in the Gaseous Phase. Institute for High Temperatures, USSR Academy of Sciences, Preprint No.1-238 (in Russian), Moscow, 1988. [all data]
Dorofeeva O.V., 1986
Dorofeeva O.V.,
On calculation of thermodynamic properties of polycyclic aromatic hydrocarbons,
Thermochim. Acta, 1986, 102, 59-66. [all data]
Frenkel M., 1994
Frenkel M.,
Thermodynamics of Organic Compounds in the Gas State, Vol. I, II, Thermodynamics Research Center, College Station, Texas, 1994, 1994. [all data]
Aldrich Chemical Company Inc., 1990
Aldrich Chemical Company Inc.,
Catalog Handbook of Fine Chemicals, Aldrich Chemical Company, Inc., Milwaukee WI, 1990, 1. [all data]
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]
Chirico, Hossenlopp, et al., 1987
Chirico, R.D.; Hossenlopp, I.A.; Nguyen, A.; Steele, W.V.,
Thermochem. and Thermophys. Prop. of Organic Compounds Derived from Fossil Substances. Thermodynamic Studies Related to the Hydrogenation of Anthracene, Natl. Inst. Pet. Energy Res. Rep. NIPER-239, Bartlesvill- e, OK, 1987. [all data]
Malaspina, Gigli, et al., 1975
Malaspina, L.; Gigli, R.; Bardi, G.; DeMaria, G.,
Vapor pressure and sublimation enthalpy of 9,10-dihydroanthracene,
Conf. Int. Thermodyn. Chim. C.R. 4th, 1975, 1, 54. [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]
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]
Hoyer and Peperle, 1958
Hoyer, H.; Peperle, W.,
Z. Elektrochem., 1958, 62, 61. [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]
Hoyer and Peperle, 1958, 2
Hoyer, H.; Peperle, W.,
Dampfdrunkmessungen an organischen substanzen und ihre sublimationswarmen,
Z. Electrochem., 1958, 62, 61-66. [all data]
Pedley, Naylor, et al., 1986
Pedley, J.B.; Naylor, R.D.; Kirby, S.P.,
Thermochemical Data of Organic Compounds, Chapman and Hall, New York, 1986, 1-792. [all data]
Magnus, Hartman, et al., 1951
Magnus, A.; Hartman, H.; Becker, F.,
Erdol u Kohle, 1951, 4, 115. [all data]
Jones, 1960
Jones, A.H.,
Sublimation Pressure Data for Organic Compounds.,
J. Chem. Eng. Data, 1960, 5, 2, 196-200, https://doi.org/10.1021/je60006a019
. [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]
Chirico, Hossenlopp, et al., 1987, 2
Chirico, R.D.; Hossenlopp, I.A.; Nguyen, A.; Steele, W.V.,
Thermochemical and thermophysical properties of organic compounds derived from fossil substances. Thermodynamic studies related to the hydrogenation of anthracene,
NIPER Report, 1987, 239, 67p. [all data]
Zhang, Chen, et al., 1997
Zhang, M.; Chen, B.; Shen, S.; Chen, S.,
Compositional studies of high-temperature coal tar by g.c.-FT-i.r. analysis of middle oil fractions,
Fuel, 1997, 76, 5, 415-423, https://doi.org/10.1016/S0016-2361(97)85518-4
. [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]
Ramsey, Lee, et al., 1980
Ramsey, J.D.; Lee, T.D.; Osselton, M.D.; Moffat, A.C.,
Gas-liquid chromatographic retention indices of 296 non-drug substances on SE-30 or OV-1 likely to be encountered in toxicological analyses,
J. Chromatogr., 1980, 184, 2, 185-206, https://doi.org/10.1016/S0021-9673(00)85641-1
. [all data]
Song, Lai, et al., 2003
Song, C.; Lai, W.-C.; Madhusudan Reddy, K.; Wei, B.,
Chapter 7. Temperature-programmed retention indices for GC and GC-MS of hydrocarbon fuels and simulated distillation GC of heavy oils
in Analytical advances for hydrocarbon research, Hsu,C.S., ed(s)., Kluwer Academic/Plenum Publishers, New York, 2003, 147-193. [all data]
Zhang, Shen, et al., 2000
Zhang, M.-J.; Shen, S.-D.; Chen, S.-Y.; Sun, Y.-H.,
Analysis of heavy oil fractions in high-temperature coal tar by capillary gas chromatography/fourier transform infrared spectrometry,
Chin. J. Chromatogr., 2000, 18, 3, 241-246. [all data]
Lai and Song, 1995
Lai, W.-C.; Song, C.,
Temperature-programmed retention indices for g.c. and g.c.-m.s. analysis of coal- and petroleum-derived liquid fuels,
Fuel, 1995, 74, 10, 1436-1451, https://doi.org/10.1016/0016-2361(95)00108-H
. [all data]
Rostad and Pereira, 1986
Rostad, C.E.; Pereira, W.E.,
Kovats and Lee retention indices determined by gas chromatography/mass spectrometry for organic compounds of environmental interest,
J. Hi. Res. Chromatogr. Chromatogr. Comm., 1986, 9, 6, 328-334, https://doi.org/10.1002/jhrc.1240090603
. [all data]
Ferrand, 1962
Ferrand, R.,
Gas phase chromatography using retention indices for the analysis of tars and their hydrogenation products,
Journees internationales d'etude des methodes de separation immediate at de chromatographie; Org. sur l'initiative du IX., 1962, 132-140. [all data]
Elizalde-González, Hutfliess, et al., 1996
Elizalde-González, M.P.; Hutfliess, M.; Hedden, K.,
Retention index system, adsorption characteristics, and sructure correlations of polycyclic aromatic hydrocarbons in fuels,
J. Hi. Res. Chromatogr., 1996, 19, 6, 345-352, https://doi.org/10.1002/jhrc.1240190608
. [all data]
Okumura, 1991
Okumura, T.,
retention indices of environmental chemicals on methyl silicone capillary column,
Journal of Environmental Chemistry (Japan), 1991, 1, 2, 333-358, https://doi.org/10.5985/jec.1.333
. [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]
Ardrey and Moffat, 1981
Ardrey, R.E.; Moffat, A.C.,
Gas-liquid chromatographic retention indices of 1318 substances of toxicological interest on SE-30 or OV-1 stationary phase,
J. Chromatogr., 1981, 220, 3, 195-252, https://doi.org/10.1016/S0021-9673(00)81925-1
. [all data]
Wang, Hou, et al., 2007
Wang, G.; Hou, Z.; Sun, Y.; Liu, Y.; Xie, B.; Liu, S.,
Investigation of pyrolysis behavior of fenoxycarb using PY-GC-MS assisted with chemometric methods,
Chem. Anal., 2007, 52, 141-156. [all data]
Durlak, Biswas, et al., 1998
Durlak, S.K.; Biswas, P.; Shi, J.; Bernhard, M.J.,
Characterization of polycyclic aromatic hydrocarbon particulate and gaseous emissions from polystyrene combustion,
Environ. Sci. Technol., 1998, 32, 15, 2301-2307, https://doi.org/10.1021/es9709031
. [all data]
Guillén, Blanco, et al., 1989
Guillén, M.D.; Blanco, J.; Bermejo, J.; Blanco, C.G.,
Temperature programmed retention indices of some PAHs on Capillary columns coated with OV-1701 and SE-54,
J. Hi. Res. Chromatogr., 1989, 12, 8, 552-554, https://doi.org/10.1002/jhrc.1240120816
. [all data]
Lee, Vassilaros, et al., 1979
Lee, M.L.; Vassilaros, D.L.; White, C.M.; Novotny, M.,
Retention Indices for Programmed-Temperature Capillary-Column Gas Chromatography of Polycyclic Aromatic Hydrocarbons,
Anal. Chem., 1979, 51, 6, 768-773, https://doi.org/10.1021/ac50042a043
. [all data]
Fuentes, Font, et al., 2007
Fuentes, M.J.; Font, R.; Gomez-Rico, M.F.; Martin-Gullon, I.,
Pyrolysis and combustion of waste lubricant oil from diesel cars: Decomposition and pollutants,
J. Anal. Appl. Pyrolysis, 2007, 79, 1-2, 215-226, https://doi.org/10.1016/j.jaap.2006.12.004
. [all data]
Guillen, Iglesias, et al., 1992
Guillen, M.D.; Iglesias, M.J.; Dominguez, A.; Blanco, C.G.,
Polynuclear aromatic hydrocarbon retention indices on SE-54 stationary phase of the volatile components of a coal tar pitch. Relationships between chromatographic retention and thermal reactivity,
J. Chromatogr., 1992, 591, 1-2, 287-295, https://doi.org/10.1016/0021-9673(92)80246-Q
. [all data]
Shlyakhov, 1984
Shlyakhov, A.F.,
Gas chromatography in organic geochemistry, Nedra, Moscow, 1984, 221. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Phase change data, IR Spectrum, Mass spectrum (electron ionization), Gas Chromatography, References
- Symbols used in this document:
Cp,gas Constant pressure heat capacity of gas Tboil Boiling point Ttriple Triple point temperature ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion ΔsubH Enthalpy of sublimation ΔsubH° Enthalpy of sublimation at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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