Cyclooctadecane

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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
DH - Eugene S. Domalski and Elizabeth D. Hearing
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Tfus346.KN/ABorgen and Dale, 1969Crystal phase 1 phase; Uncertainty assigned by TRC = 2. K; TRC
Tfus346.KN/ASondheimer, Amiel, et al., 1957Uncertainty assigned by TRC = 3. K; TRC
Tfus345.KN/ASondheimer, Amiel, et al., 1957, 2Uncertainty assigned by TRC = 3. K; TRC

Enthalpy of fusion

ΔfusH (kcal/mol) Temperature (K) Reference Comment
2.360346.Borgen and Dale, 1969, 2DH
2.36346.2Borgen and Dale, 1969, 3AC

Entropy of fusion

ΔfusS (cal/mol*K) Temperature (K) Reference Comment
6.79346.Borgen and Dale, 1969, 2DH

Enthalpy of phase transition

ΔHtrs (kcal/mol) Temperature (K) Initial Phase Final Phase Reference Comment
7.0000298.crystaline, IIcrystaline, IBorgen and Dale, 1969, 2DH

Entropy of phase transition

ΔStrs (cal/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
23.3298.crystaline, IIcrystaline, IBorgen and Dale, 1969, 2DH

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.

Borgen and Dale, 1969
Borgen, G.; Dale, J., gem-Dimethyl substituted cyclooctadecanes, conformational homogeneity of the 1,1,4,4,10,10,13,13-octamethyl derivative, J. Chem. Soc., 1969, 1969, 447-8. [all data]

Sondheimer, Amiel, et al., 1957
Sondheimer, F.; Amiel, Y.; Wolovsky, R., Unsaturated Macrocyclic Compounds V. Large Ring Poly-acetylenes, J. Am. Chem. Soc., 1957, 79, 4247-8. [all data]

Sondheimer, Amiel, et al., 1957, 2
Sondheimer, F.; Amiel, Y.; Wolovsky, R., Unsaturated Macrocyclic Compounds IV. The Oxidation of Terminal Diacetylenes to Macrocyclic Tetraacetaylenes, J. Am. Chem. Soc., 1957, 79, 6263. [all data]

Borgen and Dale, 1969, 2
Borgen, G.; Dale, J., gem-Dimethyl substituted cyclooctadecanes, conformational homogeneity of the 1,1,4,4,10,10,13,13-octamethyl derivative, J. Chem. Soc., 1969, D, Chem. [all data]

Borgen and Dale, 1969, 3
Borgen, Gerd; Dale, Johannes, gem-Dimethyl substituted cyclo-octadecanes; conformational homogeneity of the 1,1,4,4,10,10,13,13-octamethyl derivative, J. Chem. Soc. D, 1969, 9, 447, https://doi.org/10.1039/c29690000447 . [all data]


Notes

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