Chloropentamethylbenzene

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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

Quantity Value Units Method Reference Comment
Tfus427.KN/AWhite, Biggs, et al., 1940Uncertainty assigned by TRC = 2. K; TRC

Enthalpy of phase transition

ΔHtrs (kcal/mol) Temperature (K) Initial Phase Final Phase Reference Comment
0.22284.0crystaline, IVcrystaline, IIIGyoten, Yoshimoto, et al., 1982DH
0.3179153.5crystaline, IIIcrystaline, IIGyoten, Yoshimoto, et al., 1982DH
0.3179180.4crystaline, II'crystaline, IIGyoten, Yoshimoto, et al., 1982DH
0.3585187.2crystaline, III'crystaline, IIGyoten, Yoshimoto, et al., 1982Phase changes c,II'/c,II and c,III'/c,II are monotropic transitions.; DH

Entropy of phase transition

ΔStrs (cal/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
2.6584.0crystaline, IVcrystaline, IIIGyoten, Yoshimoto, et al., 1982DH
2.1153.5crystaline, IIIcrystaline, IIGyoten, Yoshimoto, et al., 1982DH
1.8180.4crystaline, II'crystaline, IIGyoten, Yoshimoto, et al., 1982DH
2.0187.2crystaline, III'crystaline, IIGyoten, Yoshimoto, et al., 1982Phase; DH

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.

White, Biggs, et al., 1940
White, A.H.; Biggs, B.S.; Morgan, S.O., Dielectric Evidence for Molecular Rotation in the Crystals of Certain Benzene Derivatives, J. Am. Chem. Soc., 1940, 62, 16-25. [all data]

Gyoten, Yoshimoto, et al., 1982
Gyoten, H.; Yoshimoto, Y.; Atake, T.; Chihara, H., Thermodynamic studies of phase transitions in chloropentamethylbenzene, J. Chem. Phys., 1982, 77, 5097-5107. [all data]


Notes

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