Chloropentamethylbenzene
- Formula: C11H15Cl
- Molecular weight: 182.690
- IUPAC Standard InChI: InChI=1S/C11H15Cl/c1-6-7(2)9(4)11(12)10(5)8(6)3/h1-5H3
- IUPAC Standard InChIKey: GWKDRPNLSOEGRT-UHFFFAOYSA-N
- CAS Registry Number: 5153-39-9
- Chemical structure:
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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 |
|---|---|---|---|---|---|
| Tfus | 427. | K | N/A | White, Biggs, et al., 1940 | Uncertainty assigned by TRC = 2. K; TRC |
Enthalpy of phase transition
| ΔHtrs (kcal/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 0.222 | 84.0 | crystaline, IV | crystaline, III | Gyoten, Yoshimoto, et al., 1982 | DH |
| 0.3179 | 153.5 | crystaline, III | crystaline, II | Gyoten, Yoshimoto, et al., 1982 | DH |
| 0.3179 | 180.4 | crystaline, II' | crystaline, II | Gyoten, Yoshimoto, et al., 1982 | DH |
| 0.3585 | 187.2 | crystaline, III' | crystaline, II | Gyoten, Yoshimoto, et al., 1982 | Phase 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 |
|---|---|---|---|---|---|
| 2.65 | 84.0 | crystaline, IV | crystaline, III | Gyoten, Yoshimoto, et al., 1982 | DH |
| 2.1 | 153.5 | crystaline, III | crystaline, II | Gyoten, Yoshimoto, et al., 1982 | DH |
| 1.8 | 180.4 | crystaline, II' | crystaline, II | Gyoten, Yoshimoto, et al., 1982 | DH |
| 2.0 | 187.2 | crystaline, III' | crystaline, II | Gyoten, Yoshimoto, et al., 1982 | Phase; DH |
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
Go To: Top, Phase change data, References
- Symbols used in this document:
Tfus Fusion (melting) point ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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