Benzyl alcohol
- Formula: C7H8O
- Molecular weight: 108.1378
- IUPAC Standard InChIKey: WVDDGKGOMKODPV-UHFFFAOYSA-N
- CAS Registry Number: 100-51-6
- 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: Benzenemethanol; α-Hydroxytoluene; α-Toluenol; (Hydroxymethyl)benzene; Benzenecarbinol; Phenylcarbinol; Phenylmethanol; Phenylmethyl alcohol; Methanol, phenyl-; NCI-C06111; Hydroxytoluene; Bentalol; Benzoyl alcohol; Benzenmethanol; Benzylic alcohol; Methanol benzene; NSC 8044; Benzyl Alkohol
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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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°gas | -22.6 ± 0.72 | kcal/mol | Ccr | Papina, Pimenova, et al., 1995 | ALS |
ΔfH°gas | -24.07 | kcal/mol | N/A | Parks, Manchester, et al., 1954 | Value computed using ΔfHliquid° value of -161.0±1.3 kj/mol from Parks, Manchester, et al., 1954 and ΔvapH° value of 60.3 kj/mol from Papina, Pimenova, et al., 1995.; DRB |
ΔfH°gas | -27.17 | kcal/mol | N/A | Landrieu, Baylocq, et al., 1929 | Value computed using ΔfHliquid° value of -174.0 kj/mol from Landrieu, Baylocq, et al., 1929 and ΔvapH° value of 60.3 kj/mol from Papina, Pimenova, et al., 1995.; DRB |
ΔfH°gas | -25.50 | kcal/mol | N/A | Schmidlin, 1906 | Value computed using ΔfHliquid° value of -167.0 kj/mol from Schmidlin, 1906 and ΔvapH° value of 60.3 kj/mol from Papina, Pimenova, et al., 1995.; DRB |
Condensed 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 as indicated in comments:
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°liquid | -37.02 ± 0.72 | kcal/mol | Ccr | Papina, Pimenova, et al., 1995 | ALS |
ΔfH°liquid | -38.49 ± 0.30 | kcal/mol | Ccb | Parks, Manchester, et al., 1954 | ALS |
ΔfH°liquid | -41.7 | kcal/mol | Ccb | Landrieu, Baylocq, et al., 1929 | ALS |
ΔfH°liquid | -39.8 | kcal/mol | Ccb | Schmidlin, 1906 | ALS |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°liquid | -894.60 ± 0.67 | kcal/mol | Ccr | Papina, Pimenova, et al., 1995 | Corresponding ΔfHºliquid = -37.02 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
ΔcH°liquid | -893.15 | kcal/mol | Ccb | Parks, Manchester, et al., 1954 | Corresponding ΔfHºliquid = -38.47 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
ΔcH°liquid | -889.9 | kcal/mol | Ccb | Landrieu, Baylocq, et al., 1929 | Corresponding ΔfHºliquid = -41.7 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
ΔcH°liquid | -890.0 | kcal/mol | Ccb | Barker, 1925 | Author was aware that data differs from previously reported values; Corresponding ΔfHºliquid = -41.6 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
ΔcH°liquid | -891.8 | kcal/mol | Ccb | Schmidlin, 1906 | Corresponding ΔfHºliquid = -39.8 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
Quantity | Value | Units | Method | Reference | Comment |
S°liquid | 51.79 | cal/mol*K | N/A | Parks, Todd, et al., 1936 | Extrapolation below 90 K, 54.06 J/mol*K.; DH |
Constant pressure heat capacity of liquid
Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
53.44 | 307.5 | Griigo'ev, Yanin, et al., 1979 | T = 307 to 461 K. p = 0.98 bar.; DH |
51.611 | 298.15 | Nichols and Wads, 1975 | DH |
52.070 | 298.1 | Parks, Todd, et al., 1936 | T = 90 to 300 K.; DH |
51.60 | 298.5 | Smith and Andrews, 1931 | T = 102 to 299 K. Value is unsmoothed experimental datum.; DH |
52.70 | 298. | von Reis, 1881 | T = 290 to 485 K.; DH |
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:
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 | 478. ± 1. | K | AVG | N/A | Average of 16 out of 18 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 257. ± 2. | K | AVG | N/A | Average of 9 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 15. ± 1. | kcal/mol | AVG | N/A | Average of 9 values; Individual data points |
Reduced pressure boiling point
Tboil (K) | Pressure (atm) | Reference | Comment |
---|---|---|---|
366.2 | 0.013 | Weast and Grasselli, 1989 | BS |
366. | 0.013 | Buckingham and Donaghy, 1982 | BS |
Enthalpy of vaporization
ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
15.8 | 318. | GS | Grayson and Fosbraey, 2006 | Based on data from 303. to 333. K.; AC |
13.0 | 400. | A | Stephenson and Malanowski, 1987 | Based on data from 385. to 573. K. See also Kkykj and Repas, 1973.; AC |
14.7 | 303. | A.ME | Stephenson and Malanowski, 1987 | Based on data from 293. to 313. K. See also Serpinskii, Voitkevich, et al., 1957 and Kkykj and Repas, 1973.; AC |
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (atm)
T = temperature (K)
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Temperature (K) | A | B | C | Reference | Comment |
---|---|---|---|---|---|
395.67 to 478.56 | 4.47142 | 1738.9 | -89.559 | Dreisbach and Shrader, 1949 | Coefficents calculated by NIST from author's data. |
Enthalpy of fusion
ΔfusH (kcal/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
2.10 | 257.6 | Acree, 1991 | AC |
2.144 | 257.6 | Parks, Todd, et al., 1936 | DH |
Entropy of fusion
ΔfusS (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
8.322 | 257.6 | Parks, Todd, et al., 1936 | DH |
Henry's Law 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: Rolf Sander
Henry's Law constant (water solution)
kH(T) = k°H exp(d(ln(kH))/d(1/T) ((1/T) - 1/(298.15 K)))
k°H = Henry's law constant for solubility in water at 298.15 K (mol/(kg*bar))
d(ln(kH))/d(1/T) = Temperature dependence constant (K)
k°H (mol/(kg*bar)) | d(ln(kH))/d(1/T) (K) | Method | Reference | Comment |
---|---|---|---|---|
9000. | E | N/A | Value obtained by missing citation using the group contribution method. |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Henry's Law 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:
HL - Edward P. Hunter and 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
LL - Sharon G. Lias and Joel F. Liebman
View reactions leading to C7H8O+ (ion structure unspecified)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Proton affinity (review) | 186.0 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 178.8 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
8.26 ± 0.05 | EI | Selim, Rabbih, et al., 1987 | LBLHLM |
8.37 | EI | Russell, Freiser, et al., 1983 | LBLHLM |
9.0 ± 0.1 | EI | Gilbert, Leach, et al., 1973 | LLK |
9.14 ± 0.05 | EI | Pignataro, Foffani, et al., 1966 | RDSH |
9.23 | PE | Ballard, Jones, et al., 1987 | Vertical value; LBLHLM |
9.53 | PE | Deshmukh, Dutta, et al., 1982 | Vertical value; LBLHLM |
9.23 | PE | Eck, Schweig, et al., 1978 | Vertical value; LLK |
9.11 | PE | Benoit and Harrison, 1977 | Vertical value; LLK |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
C5H3+ | 15.49 ± 0.09 | OH+C2H4 | EI | Selim, Rabbih, et al., 1989 | LL |
C5H3+ | 16.86 ± 0.11 | H2O+H+C2H2 | EI | Selim, Rabbih, et al., 1989 | LL |
C6H7+ | 10.33 ± 0.06 | CHO | EI | Selim, Rabbih, et al., 1987, 2 | LBLHLM |
C6H7+ | 10.67 | CO+H | EI | Russell, Freiser, et al., 1983 | LBLHLM |
C6H7+ | 10.9 | CHO? | EI | Harrison, Haynes, et al., 1965 | RDSH |
C7H6+ | 11.71 ± 0.06 | H2O | EI | Selim, Rabbih, et al., 1987, 3 | LBLHLM |
C7H7+ | 11.76 ± 0.07 | OH | EI | Selim, Rabbih, et al., 1987, 2 | LBLHLM |
C7H7+ | 11.7 | OH | EI | Meyerson, Rylander, et al., 1959 | RDSH |
C7H7O+ | 10.46 ± 0.06 | H | EI | Selim, Rabbih, et al., 1987 | LBLHLM |
C7H7O+ | 10.03 | H | EI | Russell, Freiser, et al., 1983 | LBLHLM |
De-protonation reactions
C7H7O- + =
By formula: C7H7O- + H+ = C7H8O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 370.0 ± 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° | 363.4 ± 2.0 | kcal/mol | IMRE | Bartmess, Scott, et al., 1979 | gas phase; value altered from reference due to change in acidity scale; B |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Henry's Law 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.
Papina, Pimenova, et al., 1995
Papina, T.S.; Pimenova, S.M.; Luk'yanova, V.A.; Kolesov, V.P.,
Standard enthalpies of formation of benzyl alcohol and α,α,α-trichlorotoluene,
Russ. J. Phys. Chem. (Engl. Transl.), 1995, 69, 1951-1953, In original 2148. [all data]
Parks, Manchester, et al., 1954
Parks, G.S.; Manchester, K.E.; Vaughan, L.M.,
Heats of combustion and formation of some alcohols, phenols, and ketones,
J. Chem. Phys., 1954, 22, 2089-2090. [all data]
Landrieu, Baylocq, et al., 1929
Landrieu, P.; Baylocq, F.; Johnson, J.R.,
Etude thermochimique dans la serie furanique,
Bull. Soc. Chim. France, 1929, 45, 36-49. [all data]
Schmidlin, 1906
Schmidlin, M.J.,
Recherches chimiques et thermochimiques sur la constitution des rosanilines,
Ann. Chim. Phys., 1906, 1, 195-256. [all data]
Barker, 1925
Barker, M.F.,
Calorific value and constitution,
J. Phys. Chem., 1925, 29, 1345-1363. [all data]
Parks, Todd, et al., 1936
Parks, G.S.; Todd, S.S.; Moore, W.A.,
Thermal data on organic compounds. XVI. Some heat capacity, entropy and free energy data for typical benzene derivatives and heterocyclic compounds,
J. Am. Chem. Soc., 1936, 58, 398-401. [all data]
Griigo'ev, Yanin, et al., 1979
Griigo'ev, B.A.; Yanin, G.S.; Rastorguev, Yu.L.; Thermophysical parameters of alcohols, Tr. GIAP,
54, 1979, 57-64. [all data]
Nichols and Wads, 1975
Nichols, N.; Wads, I.,
Thermochemistry of solutions of biochemical model compounds. 3. Some benzene derivatives in aqueous solution,
J. Chem. Thermodynam., 1975, 7, 329-336. [all data]
Smith and Andrews, 1931
Smith, R.H.; Andrews, D.H.,
Thermal energy studies. I. Phenyl derivatives of methane,
ethane and some related compounds. J. Am. Chem. Soc., 1931, 53, 3644-3660. [all data]
von Reis, 1881
von Reis, M.A.,
Die specifische Wärme flüssiger organischer Verbindungen und ihre Beziehung zu deren Moleculargewicht,
Ann. Physik [3], 1881, 13, 447-464. [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]
Buckingham and Donaghy, 1982
Buckingham, J.; Donaghy, S.M.,
Dictionary of Organic Compounds: Fifth Edition, Chapman and Hall, New York, 1982, 1. [all data]
Grayson and Fosbraey, 2006
Grayson, B. Terence; Fosbraey, Lynda A.,
Determination of the vapour pressure of pesticides,
Pestic. Sci., 2006, 13, 3, 269-278, https://doi.org/10.1002/ps.2780130308
. [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]
Kkykj and Repas, 1973
Kkykj, J.; Repas, M.,
Petrochemia, 1973, 13, 179. [all data]
Serpinskii, Voitkevich, et al., 1957
Serpinskii, V.V.; Voitkevich, S.A.; Lyuboshits, N.Yu.,
Zh. Fiz. Khim., 1957, 31, 1278. [all data]
Dreisbach and Shrader, 1949
Dreisbach, R.R.; Shrader, S.A.,
Vapor Pressure--Temperature Data on Some Organic Compounds,
Ind. Eng. Chem., 1949, 41, 12, 2879-2880, https://doi.org/10.1021/ie50480a054
. [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]
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]
Selim, Rabbih, et al., 1987
Selim, E.T.; Rabbih, M.A.; Fahmey, M.A.,
M and [M-1]+ ions formed for benzyl alcohol, benzyl amine and benzyl cyanide,
Org. Mass Spectrom., 1987, 22, 381. [all data]
Russell, Freiser, et al., 1983
Russell, D.H.; Freiser, B.S.; McBay, E.H.; Canada, D.C.,
The structure of decomposing [C7H7O]+ ions: Benzyl versus tropylium ion structures,
Org. Mass Spectrom., 1983, 18, 474. [all data]
Gilbert, Leach, et al., 1973
Gilbert, J.R.; Leach, W.P.; Miller, J.R.,
Ionisation appearance potential measurements in arene chromium tricarbonyls,
J. Organomet. Chem., 1973, 49, 219. [all data]
Pignataro, Foffani, et al., 1966
Pignataro, S.; Foffani, A.; Innorta, G.; Distefano, G.,
Molecular structural effects on the ionization potentials for metasubstituted aromatic compounds and for compounds of the type X-CH2-R,
Z. Physik. Chem. (Frankfurt), 1966, 49, 291. [all data]
Ballard, Jones, et al., 1987
Ballard, R.E.; Jones, J.; Read, D.; Inchley, A.; Cranmer, M.,
He(I) photoelectron studies of liquids and gases,
Chem. Phys. Lett., 1987, 137, 125. [all data]
Deshmukh, Dutta, et al., 1982
Deshmukh, P.; Dutta, T.K.; Hwang, J.L.-S.; Housecroft, C.E.; Fehlner, T.P.,
Photoelectron spectroscopic measurements of the relative charge on carbyne fragments bound to polynuclear cobalt carbonyl clusters,
J. Am. Chem. Soc., 1982, 104, 1740. [all data]
Eck, Schweig, et al., 1978
Eck, V.; Schweig, A.; Vermeer, H.,
The ultraviolet photoelectron spectrum of o-benzoquinone methide,
Tetrahedron Lett., 1978, 27, 2433. [all data]
Benoit and Harrison, 1977
Benoit, F.M.; Harrison, A.G.,
Predictive value of proton affinity. Ionization energy correlations involving oxygenated molecules,
J. Am. Chem. Soc., 1977, 99, 3980. [all data]
Selim, Rabbih, et al., 1989
Selim, E.T.M.; Rabbih, M.A.; Fahmey Ahmad, M.A.; Shalbi, A.S.,
Energetic study of [C5H3]+ fragment ion produced from some benzyl derivatives,
Arab Gulf J. Sci. Res., 1989, 7, 53. [all data]
Selim, Rabbih, et al., 1987, 2
Selim, E.T.M.; Rabbih, M.A.; Fahmey, M.A.,
A mass spectrometric study of [C7H7]+ and [C6H7]+ fragment ions obtained from benzyl alcohol, benzyl amine and benzyl cyanide,
Egypt. J. Phys., 1987, 18, 37. [all data]
Harrison, Haynes, et al., 1965
Harrison, A.G.; Haynes, P.; McLean, S.; Meyer, F.,
The mass spectra of methyl-substituted cyclopentadienes,
J. Am. Chem. Soc., 1965, 87, 5099. [all data]
Selim, Rabbih, et al., 1987, 3
Selim, E.T.; Rabbih, M.A.; Rezk, A.M.H.; Fahmey, M.A.,
Energetics of [C7H6]+ fragment ion using electron impact technique,
Indian J. Pure Appl. Phys., 1987, 25, 451. [all data]
Meyerson, Rylander, et al., 1959
Meyerson, S.; Rylander, P.N.; Eliel, E.L.; McCollum, J.D.,
Organic ions in the gas phase. VII. Tropylium ion from benzyl chloride and benzyl alcohol,
J. Am. Chem. Soc., 1959, 81, 2606. [all data]
Bartmess, Scott, et al., 1979
Bartmess, J.E.; Scott, J.A.; McIver, R.T., Jr.,
The gas phase acidity scale from methanol to phenol,
J. Am. Chem. Soc., 1979, 101, 6047. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy Cp,liquid Constant pressure heat capacity of liquid S°liquid Entropy of liquid at standard conditions Tboil Boiling point Tfus Fusion (melting) point d(ln(kH))/d(1/T) Temperature dependence parameter for Henry's Law constant k°H Henry's Law constant at 298.15K ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions 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 - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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