Naphthalene, 1,4-dimethyl-
- Formula: C12H12
- Molecular weight: 156.2237
- IUPAC Standard InChIKey: APQSQLNWAIULLK-UHFFFAOYSA-N
- CAS Registry Number: 571-58-4
- 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: 1,4-Dimethylnaphthalene; 1,4-Dimethylnapthalene
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Gas phase thermochemistry data
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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: Glushko Thermocenter, Russian Academy of Sciences, Moscow
Constant pressure heat capacity of gas
Cp,gas (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
9.89 | 50. | Thermodynamics Research Center, 1997 | p=1 bar. |
17.0 | 100. | ||
24.02 | 150. | ||
31.07 | 200. | ||
41.63 | 273.15 | ||
45.22 | 298.15 | ||
45.48 | 300. | ||
58.99 | 400. | ||
70.43 | 500. | ||
79.80 | 600. | ||
87.48 | 700. | ||
93.83 | 800. | ||
99.19 | 900. | ||
103.7 | 1000. | ||
108. | 1100. | ||
111. | 1200. | ||
114. | 1300. | ||
116. | 1400. | ||
118. | 1500. |
Phase change data
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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 as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
BS - Robert L. Brown and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 541.6 | K | N/A | Anonymous, 1949 | Uncertainty assigned by TRC = 1. K; TRC |
Tboil | 536. | K | N/A | Bailey, Bryant, et al., 1947 | Uncertainty assigned by TRC = 4. K; TRC |
Tboil | 539. | K | N/A | Newman and Hussey, 1947 | Uncertainty assigned by TRC = 5. K; TRC |
Tboil | 537. | K | N/A | Barnett and Sanders, 1933 | Uncertainty assigned by TRC = 4. K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 279. ± 20. | K | AVG | N/A | Average of 12 values; Individual data points |
Reduced pressure boiling point
Tboil (K) | Pressure (atm) | Reference | Comment |
---|---|---|---|
536.2 | 0.988 | Aldrich Chemical Company Inc., 1990 | BS |
Enthalpy of fusion
ΔfusH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
2.53 | 279.2 | DSC | Cheon and Kim, 2007 | AC |
2.53 | 279.9 | N/A | Acree, 1991 | AC |
Gas phase ion energetics data
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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 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
Electron affinity determinations
EA (eV) | Method | Reference | Comment |
---|---|---|---|
<0.247 ± 0.078 | ECD | Wojnarovits and Foldiak, 1981 | EA is an upper limit: Chen and Wentworth, 1989. G3MP2B3 calculations indicate an EA of ca. -0.2 eV, anion unbound.; B |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
7.78 ± 0.03 | EI | Nounou, 1966 | RDSH |
7.82 ± 0.03 | PE | Heilbronner, Hoshi, et al., 1976 | Vertical value; LLK |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
C12H11+ | 12.9 ± 0.1 | H | EI | Nounou, 1966 | RDSH |
IR Spectrum
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Data compiled by: Coblentz Society, Inc.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
UV/Visible spectrum
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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: 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 | Cram, Dalton, et al., 1963 |
---|---|
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. 327 |
Instrument | Cary PMS 11 |
Melting point | 7.6 |
Boiling point | 268 |
References
Go To: Top, Gas phase thermochemistry data, Phase change data, Gas phase ion energetics data, IR Spectrum, UV/Visible spectrum, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Thermodynamics Research Center, 1997
Thermodynamics Research Center,
Selected Values of Properties of Chemical Compounds., Thermodynamics Research Center, Texas A&M University, College Station, Texas, 1997. [all data]
Anonymous, 1949
Anonymous, R.,
, Am. Pet. Inst. Res. Proj. 45, Ohio State Univ., 1949. [all data]
Bailey, Bryant, et al., 1947
Bailey; Bryant; Hancock; Morrell; Smith, J.O.,
The ten dimethylnaphthalenes, their physical properties, molecular compounds, and ultra-violet spectra,
J. Inst. Pet., 1947, 33, 503. [all data]
Newman and Hussey, 1947
Newman, M.S.; Hussey, A.S.,
The Synthesis and Optical Resolution oif 4,5,8-Trimethyl-1-pheanthrylacetic Acid,
J. Am. Chem. Soc., 1947, 69, 3023. [all data]
Barnett and Sanders, 1933
Barnett, E.B.; Sanders, F.G.,
The synthesis of some homologous naphthalenes,
J. Chem. Soc., 1933, 1933, 434. [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]
Cheon and Kim, 2007
Cheon, Yang-Ho; Kim, Kwang-Joo,
Solid-Liquid Equilibria of Binary Mixtures of Dimethylnaphthalene Isomers,
J. Chem. Eng. Data, 2007, 52, 4, 1390-1393, https://doi.org/10.1021/je700088n
. [all data]
Acree, 1991
Acree, William E.,
Thermodynamic properties of organic compounds: enthalpy of fusion and melting point temperature compilation,
Thermochimica Acta, 1991, 189, 1, 37-56, https://doi.org/10.1016/0040-6031(91)87098-H
. [all data]
Wojnarovits and Foldiak, 1981
Wojnarovits, L.; Foldiak, G.,
Electron capture detection of aromatic hydrocarbons,
J. Chromatogr. Sci., 1981, 206, 511. [all data]
Chen and Wentworth, 1989
Chen, E.C.M.; Wentworth, W.E.,
Experimental Determination of Electron Affinities of Organic Molecules,
Mol. Cryst. Liq. Cryst., 1989, 171, 271. [all data]
Nounou, 1966
Nounou, P.,
Etude des composes aromatiques par spectrometrie de masse. I. Mesure des potentials d'ionisation et d'apparition par la methode du potential retardateur et interpretation des courbes d'ionisation differentielle,
J. Chim. Phys., 1966, 63, 994. [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]
Cram, Dalton, et al., 1963
Cram, D.J.; Dalton, C.K.; Knox, G.R.,
Macro rings. XXIX. Stereochemistry of a 1,6-cycloaddition reaction,
J. Am. Chem. Soc., 1963, 85, 1088-1093. [all data]
Notes
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- Symbols used in this document:
AE Appearance energy Cp,gas Constant pressure heat capacity of gas EA Electron affinity Tboil Boiling point Tfus Fusion (melting) point ΔfusH Enthalpy of fusion - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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