Benzene-hexa-n-heptanoate

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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: Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
solid,1 bar365.70cal/mol*KN/ASorai and Suga, 1981 

Constant pressure heat capacity of solid

Cp,solid (cal/mol*K) Temperature (K) Reference Comment
359.70298.15Sorai and Suga, 1981T = 13 to 393 K.
358.5300.Sorai, Tsuji, et al., 1979T = 13 to 393 K. Data given graphically. Cp value is a graphical estimate.

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 by: Eugene S. Domalski and Elizabeth D. Hearing

Temperature of phase transition

Ttrs (K) Initial Phase Final Phase Reference Comment
222.80crystaline, IIIcrystaline, IISorai and Suga, 1981Anomalous transition. c,II/c,I 230.81 K First order transition.
222.80crystaline, IIIcrystaline, IISorai, Tsuji, et al., 1979 

Enthalpy of phase transition

ΔHtrs (kcal/mol) Temperature (K) Initial Phase Final Phase Reference Comment
0.2677129.crystaline, IVcrystaline, IIISorai and Suga, 1981 
7.6984353.79crystaline, I Sorai and Suga, 1981 
5.1482359.28  Sorai and Suga, 1981Triple point is 353.81 K.
0.2677129.crystaline, IVcrystaline, IIISorai, Tsuji, et al., 1979 
2.7486230.81crystaline, IIcrystaline, ISorai, Tsuji, et al., 1979Combination of transition c,III/c,II and c,II/c,I.
7.6984353.79crystaline, IliquidSorai, Tsuji, et al., 1979 
5.1482359.28liquidliquidSorai, Tsuji, et al., 1979 

Entropy of phase transition

ΔStrs (cal/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
2.02129.crystaline, IV, Anomalous or diffuse firstcrystaline, III, order transitionSorai and Suga, 1981 
21.77353.79crystaline, I Sorai and Suga, 1981 
14.32359.28  Sorai and Suga, 1981Triple
2.02129.crystaline, IVcrystaline, IIISorai, Tsuji, et al., 1979 
12.06230.81crystaline, IIcrystaline, ISorai, Tsuji, et al., 1979Combination
21.77353.79crystaline, I, Solidliquid, mesophaseSorai, Tsuji, et al., 1979 
14.32359.28liquid, Mesophaseliquid, liquid transitionSorai, Tsuji, et al., 1979 

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.

Sorai and Suga, 1981
Sorai, M.; Suga, H., Studies on mesogenic disc-like molecules. II. Heat capacity of benzene-hexa-n-heptanoate from 13 to 393 K, Mol. Cryst. Liq. Cryst., 1981, 73, 47-69. [all data]

Sorai, Tsuji, et al., 1979
Sorai, M.; Tsuji, K.; Suga, H.; Seki, S., Heat capacities of a disc-like mesogen and its precursor having a structure of benzene hexa-n-alkanoate (C6(OCO-n-CmH2m+1)6), Liq. Cryst., 1979, Proc. [all data]


Notes

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