1,3,5,7-Tetramethyl-adamantane

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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
Δfsolid-86.54 ± 0.46kcal/molCcbClark, Knox, et al., 1979Gas flow technique for Hs, see Clark, Knox, et al., 1975
Δfsolid-90.5 ± 0.9kcal/molCcbSteele and Watt, 1977 
Quantity Value Units Method Reference Comment
Δcsolid-2049.95 ± 0.47kcal/molCcbClark, Knox, et al., 1979Gas flow technique for Hs, see Clark, Knox, et al., 1975; Corresponding Δfsolid = -86.55 kcal/mol (simple calculation by NIST; no Washburn corrections)
Δcsolid-2046.0 ± 0.9kcal/molCcbSteele and Watt, 1977Corresponding Δfsolid = -90.5 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
CAL - James S. Chickos, William E. Acree, Jr., Joel F. Liebman, Students of Chem 202 (Introduction to the Literature of Chemistry), University of Missouri -- St. Louis

Quantity Value Units Method Reference Comment
Tfus337.2KN/AClark, Knox, et al., 1977Crystal phase 1 phase; Uncertainty assigned by TRC = 0.2 K; TRC
Quantity Value Units Method Reference Comment
Δsub19.39kcal/molVClark, Knox, et al., 1979Gas flow technique for Hs, see Clark, Knox, et al., 1975; ALS
Δsub18.5kcal/molN/AClark, Knox, et al., 1979DRB
Δsub20.0 ± 0.3kcal/molVSteele and Watt, 1977ALS
Δsub23.2kcal/molN/ASteele and Watt, 1977DRB
Δsub20.0 ± 0.31kcal/molBGSteele and Watt, 1977Based on data from 310. to 350. K.; AC

Enthalpy of sublimation

ΔsubH (kcal/mol) Temperature (K) Method Reference Comment
19.4 ± 2.6305.TSGCClark, Knox, et al., 1975, 2Based on data from 295. to 315. K.; AC

Enthalpy of fusion

ΔfusH (kcal/mol) Temperature (K) Reference Comment
2.35337.2Clark, Knox, et al., 1977AC

Entropy of fusion

ΔfusS (cal/mol*K) Temperature (K) Reference Comment
0.299183.3Clark, Knox, et al., 1977CAL
6.960337.2

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


References

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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]

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]


Notes

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