Aniline
- Formula: C6H7N
- Molecular weight: 93.1265
- IUPAC Standard InChIKey: PAYRUJLWNCNPSJ-UHFFFAOYSA-N
- CAS Registry Number: 62-53-3
- 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. - Isotopologues:
- Other names: Benzenamine; Aminobenzene; Aminophen; Anyvim; Benzene, amino-; Blue Oil; C.I. 76000; Phenylamine; Aniline Oil; Aniline reagent; Anilin; Anilina; Benzidam; C.I. Oxidation base 1; Cyanol; Huile D'aniline; Krystallin; Kyanol; NCI-C03736; Rcra waste number U012; UN 1547; Benzeneamine
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Phase change data
Go To: Top, Gas phase ion energetics data, 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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
BS - Robert L. Brown and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
AC - William E. Acree, Jr., James S. Chickos
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 457. ± 2. | K | AVG | N/A | Average of 46 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 267.0 ± 0.3 | K | AVG | N/A | Average of 19 out of 24 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Ttriple | 267.13 | K | N/A | Hatton, Hildenbrand, et al., 1962 | Uncertainty assigned by TRC = 0.02 K; from plot of 1/f vs T; TRC |
Ttriple | 267.300 | K | N/A | Ziegler and Andrews, 1942 | Uncertainty assigned by TRC = 0.2 K; TRC |
Ttriple | 266.9 | K | N/A | Parks, Huffman, et al., 1933 | Uncertainty assigned by TRC = 0.1 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tc | 698.8 ± 0.4 | K | AVG | N/A | Average of 8 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Pc | 52.4 ± 0.2 | atm | AVG | N/A | Average of 6 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
ρc | 3.48 | mol/l | N/A | Lagutkin and Kuropatkin, 1981 | Uncertainty assigned by TRC = 0.05 mol/l; calculated from corr. Zc, and lit. values of Tc and Pc; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Zc | 0.26 | none | N/A | Lagutkin and Kuropatkin, 1981 | Uncertainty assigned by TRC = 0.003 none; Correlation based on literature values of 2nd vireal coeff.; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 13. ± 1. | kcal/mol | AVG | N/A | Average of 7 values; Individual data points |
Enthalpy of vaporization
ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
12.2 ± 0.05 | 360. | EB | Steele, Chirico, et al., 2002 | Based on data from 350. to 499. K.; AC |
11.5 ± 0.05 | 400. | EB | Steele, Chirico, et al., 2002 | Based on data from 350. to 499. K.; AC |
10.8 ± 0.05 | 440. | EB | Steele, Chirico, et al., 2002 | Based on data from 350. to 499. K.; AC |
10.1 ± 0.1 | 480. | EB | Steele, Chirico, et al., 2002 | Based on data from 350. to 499. K.; AC |
10.9 | 444. | N/A | Lee, Chen, et al., 1992 | Based on data from 421. to 591. K.; AC |
12.5 | 288. | A | Stephenson and Malanowski, 1987 | Based on data from 273. to 338. K.; AC |
12.8 | 319. | A | Stephenson and Malanowski, 1987 | Based on data from 304. to 485. K.; AC |
11.6 | 388. | A | Stephenson and Malanowski, 1987 | Based on data from 373. to 458. K.; AC |
11.1 | 470. | A | Stephenson and Malanowski, 1987 | Based on data from 455. to 523. K.; AC |
10.14 | 457.2 | N/A | Majer and Svoboda, 1985 | |
12.3 | 350. | N/A | Maher and Smith, 1979 | Based on data from 313. to 386. K.; AC |
12.6 | 293. | N/A | Ravdel and Danilov, 1968 | Based on data from 288. to 298. K.; AC |
12.9 | 319. | N/A | Hatton, Hildenbrand, et al., 1962, 2 | Based on data from 304. to 457. K.; AC |
12.7 | 333. | C | Hatton, Hildenbrand, et al., 1962, 2 | AC |
Enthalpy of vaporization
ΔvapH =
A exp(-βTr) (1 − Tr)β
ΔvapH =
Enthalpy of vaporization (at saturation pressure)
(kcal/mol)
Tr = reduced temperature (T / Tc)
View plot Requires a JavaScript / HTML 5 canvas capable browser.
Temperature (K) | A (kcal/mol) | β | Tc (K) | Reference | Comment |
---|---|---|---|---|---|
298. to 333. | 19.28 | 0.3744 | 699. | Majer and Svoboda, 1985 |
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 |
---|---|---|---|---|---|
304. to 457. | 4.33970 | 1661.858 | -74.048 | Hatton, Hildenbrand, et al., 1962, 2 | Coefficents calculated by NIST from author's data. |
Enthalpy of fusion
ΔfusH (kcal/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
2.5189 | 267.13 | Hatton, Hildenbrand, et al., 1962, 2 | DH |
2.519 | 267.1 | Ahmed and Eades, 1972 | See also Domalski and Hearing, 1996.; AC |
2.610 | 267.3 | Ziegler and Andrews, 1942, 2 | AC |
2.5229 | 266.8 | Parks, Huffman, et al., 1933, 2 | DH |
Entropy of fusion
ΔfusS (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
9.457 | 266.8 | Parks, Huffman, et al., 1933, 2 | DH |
Gas phase ion energetics data
Go To: Top, Phase change data, 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 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
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
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 C6H7N+ (ion structure unspecified)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
IE (evaluated) | 7.720 ± 0.002 | eV | N/A | N/A | L |
Quantity | Value | Units | Method | Reference | Comment |
Proton affinity (review) | 210.9 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 203.3 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
C4H4N+ | 12.3 ± 0.1 | ? | PI | Akopyan and Vilesov, 1964 | RDSH |
C5H5+ | 15.2 ± 0.2 | CHN+H | EI | Tajima and Tsuchiya, 1973 | LLK |
C5H5+ | 15.24 | CHN+H | EI | Occolowitz and White, 1968 | RDSH |
C5H6+ | 11.3 ± 0.1 | CHN | TRPI | Lifshitz and Malinovich, 1984 | LBLHLM |
C5H6+ | 11.3 ± 0.2 | CHN | EI | Lifshitz, Gotchiguian, et al., 1983 | LBLHLM |
C5H6+ | 12.77 ± 0.05 | CHN | EI | Zaretskii, Oren, et al., 1976 | LLK |
C5H6+ | 12.13 ± 0.06 | CHN | EI | Bentley, Johnstone, et al., 1973 | LLK |
C5H6+ | 12.0 ± 0.1 | ? | EI | Gross, 1972 | LLK |
C5H6+ | 12.3 ± 0.1 | CHN | PI | Akopyan and Vilesov, 1964 | RDSH |
De-protonation reactions
C6H6N- + =
By formula: C6H6N- + H+ = C6H7N
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 368.18 ± 0.30 | kcal/mol | D-EA | Wren, Vogelhuber, et al., 2012 | gas phase; B |
ΔrH° | 366.4 ± 2.1 | kcal/mol | G+TS | Bartmess, Scott, et al., 1979 | gas phase; value altered from reference due to change in acidity scale; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 360.91 ± 0.67 | kcal/mol | H-TS | Wren, Vogelhuber, et al., 2012 | gas phase; B |
ΔrG° | 359.1 ± 2.0 | kcal/mol | IMRE | Bartmess, Scott, et al., 1979 | gas phase; value altered from reference due to change in acidity scale; B |
Gas Chromatography
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
Kovats' RI, non-polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Capillary | OV-101 | 150. | 939.1 | Cha and Lee, 1994 | Column length: 20. m; Column diameter: 0.5 mm |
Capillary | OV-101 | 180. | 952.6 | Cha and Lee, 1994 | Column length: 20. m; Column diameter: 0.5 mm |
Capillary | HP-1 | 60. | 966. | Zhang, Li, et al., 1992 | N2; Column length: 25. m; Column diameter: 0.20 mm |
Capillary | HP-1 | 60. | 967. | Zhang, Li, et al., 1992 | N2; Column length: 25. m; Column diameter: 0.20 mm |
Capillary | HP-1 | 100. | 968. | Zhang, Li, et al., 1992 | N2; Column length: 25. m; Column diameter: 0.20 mm |
Capillary | HP-1 | 100. | 968. | Zhang, Li, et al., 1992 | N2; Column length: 25. m; Column diameter: 0.20 mm |
Packed | Apolane | 130. | 939. | Dutoit, 1991 | Column length: 3.7 m |
Packed | SE-30 | 180. | 983. | Dolecka, Raczynska, et al., 1988 | He, Chromosorb W AW; Column length: 2. m |
Packed | SE-30 | 180. | 995. | Oszczapowicz, Osek, et al., 1985 | N2, Chromosorb A AW; Column length: 3. m |
Packed | SE-30 | 180. | 995. | Oszczapowicz, Osek, et al., 1984 | N2, Chromosorb W AW; Column length: 3. m |
Packed | Apiezon L | 180. | 999. | Vernon and Edwards, 1975 | N2, Celite; Column length: 1. m |
Kovats' RI, polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Packed | Carbowax 20M | 150. | 1752.0 | Ellis and Still, 1979 | Chromosorb W, AW-DMCS |
Packed | Carbowax 20M | 165. | 1764.5 | Ellis and Still, 1979, 2 | Chromosorb W, AW-DMCS |
Packed | PEG-2000 | 150. | 1717. | Anderson, Jurel, et al., 1973 | He, Celite 545 (44-60 mesh); Column length: 3. m |
Packed | PEG-2000 | 179. | 1754. | Anderson, Jurel, et al., 1973 | He, Celite 545 (44-60 mesh); Column length: 3. m |
Packed | PEG-2000 | 180. | 1747. | Anderson, Jurel, et al., 1973 | He, Celite 545 (44-60 mesh); Column length: 3. m |
Packed | PEG-2000 | 200. | 1759. | Anderson, Jurel, et al., 1973 | He, Celite 545 (44-60 mesh); Column length: 3. m |
Packed | PEG-2000 | 200. | 1761. | Anderson, Jurel, et al., 1973 | He, Celite 545 (44-60 mesh); Column length: 3. m |
Packed | PEG-20M | 210. | 1766.7 | Still, Evans, et al., 1972 | Chromosorb G; Column length: 3. m |
Van Den Dool and Kratz RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-1 | 939.2 | Sun and Stremple, 2003 | 30. m/0.25 mm/0.25 μm, He, 3. K/min; Tstart: 40. C; Tend: 325. C |
Capillary | SE-54 | 980. | Li, Wang, et al., 1998 | H2, 35. C @ 3. min, 4. K/min; Column length: 25. m; Column diameter: 0.31 mm; Tend: 250. C |
Capillary | OV-1 | 945.6 | Gautzsch and Zinn, 1996 | 8. K/min; Tstart: 35. C; Tend: 300. C |
Packed | SE-30 | 955. | Peng, Ding, et al., 1988 | He, Supelcoport and Chromosorb, 40. C @ 4. min, 10. K/min, 250. C @ 60. min; Column length: 3.05 m |
Capillary | DB-5 | 971. | Rostad and Pereira, 1986 | 30. m/0.26 mm/0.25 μm, He, 50. C @ 4. min, 6. K/min, 300. C @ 20. min |
Van Den Dool and Kratz RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | SE-54 | 979. | Li, Wang, et al., 1998 | H2; Column length: 25. m; Column diameter: 0.31 mm; Program: not specified |
Capillary | 5 % Phenyl methyl siloxane | 977. | Yasuhara, Shiraishi, et al., 1997 | 25. m/0.31 mm/0.52 μm, He; Program: 50C(2min) => (20C/min) => 120C => (7C/min) => 310C(10min) |
Capillary | Methyl Silicone | 955. | Peng, Yang, et al., 1991 | Program: not specified |
Normal alkane RI, non-polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Capillary | Polydimethyl siloxane | 105. | 954. | Tello, Lebron-Aguilar, et al., 2009 | |
Capillary | Polydimethyl siloxane | 75. | 947. | Tello, Lebron-Aguilar, et al., 2009 | |
Capillary | Polydimethyl siloxane | 90. | 950. | Tello, Lebron-Aguilar, et al., 2009 | |
Capillary | Methyl Silicone | 100. | 952. | Lebrón-Aguilar, Quintanilla-López, et al., 2007 | |
Capillary | Methyl Silicone | 120. | 958. | Lebrón-Aguilar, Quintanilla-López, et al., 2007 | |
Capillary | Methyl Silicone | 140. | 964. | Lebrón-Aguilar, Quintanilla-López, et al., 2007 | |
Capillary | Methyl Silicone | 80. | 947. | Lebrón-Aguilar, Quintanilla-López, et al., 2007 |
Normal alkane RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | TR-1 | 946. | Gruzdev, Alferova, et al., 2011 | 30. m/0.32 mm/0.25 μm, Helium, 5. K/min; Tstart: 50. C; Tend: 300. C |
Capillary | TR-1 | 945. | Gruzdev, Alferova, et al., 2011, 2 | 30. m/0.32 mm/0.25 μm, Helium, 5. K/min; Tstart: 50. C; Tend: 300. C |
Capillary | TR-1 | 946. | Gruzdev, Filippova, et al., 2011 | 30. m/0.32 mm/0.25 μm, Helium, 5. K/min; Tstart: 50. C; Tend: 300. C |
Normal alkane RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | SPB-1 | 963. | Flanagan, Streete, et al., 1997 | 60. m/0.53 mm/5. μm, He; Program: 40C(6min) => 5C/min => 80C => 10C/min => 200C |
Normal alkane RI, polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-Wax | 1710. | Peng, Yang, et al., 1991, 2 | Program: not specified |
Capillary | DB-Wax | 1740. | Peng, Yang, et al., 1991, 2 | Program: not specified |
Lee's RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-5 | 155.33 | Rostad and Pereira, 1986 | 30. m/0.26 mm/0.25 μm, He, 50. C @ 4. min, 6. K/min, 300. C @ 20. min |
References
Go To: Top, Phase change data, Gas phase ion energetics data, Gas Chromatography, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Hatton, Hildenbrand, et al., 1962
Hatton, W.E.; Hildenbrand, D.L.; Sinke, G.C.; Stull, D.R.,
Chemical Thermodynamic Properties of Aniline,
J. Chem. Eng. Data, 1962, 7, 229. [all data]
Ziegler and Andrews, 1942
Ziegler, W.T.; Andrews, D.H.,
The heat capacity of benzene-d6,
J. Am. Chem. Soc., 1942, 64, 2482. [all data]
Parks, Huffman, et al., 1933
Parks, G.S.; Huffman, H.M.; Barmore, M.,
Thermal Data on Organic Compounds. XI. The Heat Capacities, Entropies and Free Energies of Ten Compounds Containing Oxygen or Nitrogen,
J. Am. Chem. Soc., 1933, 55, 7, 2733, https://doi.org/10.1021/ja01334a016
. [all data]
Lagutkin and Kuropatkin, 1981
Lagutkin, O.D.; Kuropatkin, E.I.,
Critical coefficient of compressibility and critical dens. of aniline,
Zh. Fiz. Khim., 1981, 55, 1329. [all data]
Steele, Chirico, et al., 2002
Steele, W.V.; Chirico, R.D.; Knipmeyer, S.E.; Nguyen, A.,
Vapor Pressure, Heat Capacity, and Density along the Saturation Line: Measurements for Benzenamine, Butylbenzene, sec -Butylbenzene, tert -Butylbenzene, 2,2-Dimethylbutanoic Acid, Tridecafluoroheptanoic Acid, 2-Butyl-2-ethyl-1,3-propanediol, 2,2,4-Trimethyl-1,3-pentanediol, and 1-Chloro-2-propanol,
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Lee, Chen, et al., 1992
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Vapor-liquid equilibria in the system of toluene/aniline, aniline/naphthalene, and naphthalene/quinoline,
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Enthalpies of Vaporization of Organic Compounds: A Critical Review and Data Compilation, Blackwell Scientific Publications, Oxford, 1985, 300. [all data]
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A new total pressure vapor-liquid equilibrium apparatus. The ethanol + aniline system at 313.15, 350.81, and 386.67 K,
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Chemical thermodynamic properties of aniline,
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Ahmed and Eades, 1972
Ahmed, A.M.I.; Eades, R.G.,
Proton relaxation in solid aniline and some methyl derivatives,
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The heat capacity of benzene-d6,
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Parks, G.S.; Huffman, H.M.; Barmore, M.,
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Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update,
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The laser photoelectron spectrum of gas phase aniline,
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Photoelectron spectroscopy: The effects of steric inhibition to resonance in anilines,
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Energy partitioning data as an ion structure probe. Substituted anisoles,
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Electron-impact ionization and appearance potentials,
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Notes
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- Symbols used in this document:
AE Appearance energy IE (evaluated) Recommended ionization energy Pc Critical pressure Tboil Boiling point Tc Critical temperature Tfus Fusion (melting) point Ttriple Triple point temperature Zc Critical compressability factor ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization at standard conditions ρc Critical density - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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