2-Methyladamantane
- Formula: C11H18
- Molecular weight: 150.2606
- IUPAC Standard InChIKey: VMODAALDMAYACB-UHFFFAOYSA-N
- CAS Registry Number: 700-56-1
- 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: Tricyclo[3.3.1.13,7]decane, 2-methyl-
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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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°gas | -36.3 ± 1.0 | kcal/mol | Ccb | Clark, Knox, et al., 1979 | Reanalyzed by Pedley, Naylor, et al., 1986, Original value = -35.66 ± 0.62 kcal/mol; Gas flow technique for Hs, see Clark, Knox, et al., 1975 |
ΔfH°gas | -36.18 ± 0.96 | kcal/mol | Ccb | Steele and Watt, 1977 | Reanalyzed by Pedley, Naylor, et al., 1986, Original value = -37.4 ± 0.5 kcal/mol |
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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°solid | -51.80 ± 0.29 | kcal/mol | Ccb | Clark, Knox, et al., 1979 | Gas flow technique for Hs, see Clark, Knox, et al., 1975 |
ΔfH°solid | -53.7 ± 0.4 | kcal/mol | Ccb | Steele and Watt, 1977 | |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°solid | -1597.60 ± 0.29 | kcal/mol | Ccb | Clark, Knox, et al., 1979 | Gas flow technique for Hs, see Clark, Knox, et al., 1975; Corresponding ΔfHºsolid = -51.80 kcal/mol (simple calculation by NIST; no Washburn corrections) |
ΔcH°solid | -1595.7 ± 0.4 | kcal/mol | Ccb | Steele and Watt, 1977 | Corresponding ΔfHºsolid = -53.7 kcal/mol (simple calculation by NIST; no Washburn corrections) |
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
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 |
---|---|---|---|---|---|
Tfus | 414.0 | K | N/A | Clark, Knox, et al., 1977 | Crystal phase 1 phase; Uncertainty assigned by TRC = 0.5 K; sealed tube melting point; compound too volatile to perform calorimetric run on fusion.; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔsubH° | 16.14 | kcal/mol | V | Clark, Knox, et al., 1979 | Gas flow technique for Hs, see Clark, Knox, et al., 1975; ALS |
ΔsubH° | 15.5 | kcal/mol | N/A | Clark, Knox, et al., 1979 | DRB |
ΔsubH° | 16.3 ± 0.3 | kcal/mol | V | Steele and Watt, 1977 | ALS |
ΔsubH° | 17.6 | kcal/mol | N/A | Steele and Watt, 1977 | DRB |
ΔsubH° | 16.3 ± 0.31 | kcal/mol | N/A | Steele and Watt, 1977 | Based on data from 300. to 340. K.; AC |
Enthalpy of sublimation
ΔsubH (kcal/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
16.1 ± 0.50 | 320. | Clark, Knox, et al., 1975, 2 | Based on data from 310. to 330. K.; AC |
Reaction 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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
By formula: C11H18 = C11H18
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -3.37 ± 0.11 | kcal/mol | Eqk | Engler, Blanchard, et al., 1972 | liquid phase; GLC |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry 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 as indicated in comments:
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
9.24 | PE | Bodor, Dewar, et al., 1970 | RDSH |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry 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.
Clark, Knox, et al., 1979
Clark, T.; Knox, T.M.O.; McKervey, M.A.; Mackle, H.; Rooney, J.J.,
Thermochemistry of bridged-ring substances. Enthalpies of formation of some diamondoid hydrocarbons and of perhydroquinacene. Comparisons with data from empirical force field calculations,
J. Am. Chem. Soc., 1979, 101, 2404-2410. [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]
Clark, Knox, et al., 1975
Clark, T.; Knox, T.M.; Mackle, H.; McKervey, M.A.; Rooney, J.J.,
Calorimetric evaluation of enthalpies of formation of some bridged-ring hydrocarbons. Comparison with data from empirical force field calculations.,
J. Am. Chem. Soc., 1975, 97, 3835-3836. [all data]
Steele and Watt, 1977
Steele, W.V.; Watt, I.,
The standard enthalpies of formation of adamantanoid compounds 4. Methyladamantanes,
J. Chem. Thermodyn., 1977, 9, 843-849. [all data]
Clark, Knox, et al., 1977
Clark, Timothy; Knox, Trevor Mc.O.; Mackle, Henry; McKervey, M. Anthony,
Order--disorder transitions in substituted adamantanes,
J. Chem. Soc., Faraday Trans. 1, 1977, 73, 0, 1224, https://doi.org/10.1039/f19777301224
. [all data]
Clark, Knox, et al., 1975, 2
Clark, Timothy; Knox, Trevor; Mackle, Henry; McKervey, M. Anthony; Rooney, John J.,
Heats of sublimation of some cage hydrocarbons by a temperature scanning technique,
J. Chem. Soc., Faraday Trans. 1, 1975, 71, 0, 2107, https://doi.org/10.1039/f19757102107
. [all data]
Engler, Blanchard, et al., 1972
Engler, E.M.; Blanchard, K.R.; Schleyer, P.v.R.,
Enhanced axial-equatorial enthalpy differences in the methyl adamantanes,
J. Chem. Soc. Chem. Commun., 1972, 1210-1212. [all data]
Bodor, Dewar, et al., 1970
Bodor, N.; Dewar, M.J.S.; Worley, S.D.,
Photoelectron spectra of molecules. III. Ionization potentials of some cyclic hydrocarbons and their derivatives, and heats of formation and ionization potentials calculated by the MINDO SCF MO method,
J. Am. Chem. Soc., 1970, 92, 19. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
Tfus Fusion (melting) point ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions ΔrH° Enthalpy of reaction at standard conditions 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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