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4-Nitrophenyl-4'-n-octyloxybenzoate

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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

Constant pressure heat capacity of solid

Cp,solid (cal/mol*K) Temperature (K) Reference Comment
122.300.Rachwalska, Massalska-Arodz, et al., 1982T = 100 to 356 K. Data given graphically. Value given is an estimate from the graph.

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, Kenneth Kroenlein director
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Ttriple323.70KN/ARachwalska, Massalska-Arodz, et al., 1982, 2Smectic liquid crystal phase; Uncertainty assigned by TRC = 0.02 K; TRC

Enthalpy of fusion

DeltafusH (kcal/mol) Temperature (K) Reference Comment
8.2280323.70Rachwalska, Massalska-Arodz, et al., 1982Solid-smectic.; DH

Entropy of fusion

DeltafusS (cal/mol*K) Temperature (K) Reference Comment
25.43323.70Rachwalska, Massalska-Arodz, et al., 1982Solid-smectic.; DH

Temperature of phase transition

Ttrs (K) Initial Phase Final Phase Reference Comment
323.crystaline, IIcrystaline, IBata, Buka, et al., 1979DH

Enthalpy of phase transition

DeltaHtrs (kcal/mol) Temperature (K) Initial Phase Final Phase Reference Comment
0.0509334.9liquidliquidRachwalska, Massalska-Arodz, et al., 1982DH
0.107341.2liquidliquidRachwalska, Massalska-Arodz, et al., 1982DH
8.2983323.2crystaline, IIliquidBata, Buka, et al., 1979DH
0.022334.liquidliquidBata, Buka, et al., 1979DH
0.0693341.liquidliquidBata, Buka, et al., 1979DH

Entropy of phase transition

DeltaStrs (cal/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
0.14334.9liquid, Smecticliquid, nematicRachwalska, Massalska-Arodz, et al., 1982DH
0.31341.2liquid, Nematicliquid, isotropicRachwalska, Massalska-Arodz, et al., 1982DH
25.8323.2crystaline, IIliquidBata, Buka, et al., 1979DH
0.072334.liquid, Smectic Aliquid, nematicBata, Buka, et al., 1979DH
0.21341.liquid, Nematicliquid, isotropicBata, Buka, et al., 1979DH

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.

Rachwalska, Massalska-Arodz, et al., 1982
Rachwalska, M.; Massalska-Arodz, M.; Moscicki, J.K.; Jaich, A., Calorimetric study of NPOB, Mol. Cryst. Liq. Cryst., 1982, 80, 157-164. [all data]

Rachwalska, Massalska-Arodz, et al., 1982, 2
Rachwalska, M.; Massalska-Arodz, M.; Moscicki, J.K.; Jaich, A., Calorimetric Study of NPOB, Mol. Cryst. Liq. Cryst., 1982, 80, 157. [all data]

Bata, Buka, et al., 1979
Bata, L.; Buka, A.; Janossy, I.; Szabon, J., Investigation of the physical parameters of NPOOB around the phase transitions, Adv. Liq. Cryst. Res. Appl., Proc. Liq. Cryst. Conf. Soc. Countries, 3rd, 1979, 1, 209-219. [all data]


Notes

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