6-Octadecenoic acid, (Z)-
- Formula: C18H34O2
- Molecular weight: 282.4614
- IUPAC Standard InChI: InChI=1S/C18H34O2/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20/h12-13H,2-11,14-17H2,1H3,(H,19,20)/b13-12-
- IUPAC Standard InChIKey: CNVZJPUDSLNTQU-SEYXRHQNSA-N
- CAS Registry Number: 593-39-5
- Chemical structure:
This structure is also available as a 2d Mol file - Species with the same structure:
- Other names: cis- -6-Octadecenoic acid; (Z)-Octadec-6-enoic acid; Petroselinic acid; cis- -12,δ-6-Octadecenoic acid
- Information on this page:
- Other data available:
- Options:
Data at NIST subscription sites:
NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.
Phase change data
Go To: Top, References, Notes
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:
DH - Eugene S. Domalski and Elizabeth D. Hearing
AC - William E. Acree, Jr., James S. Chickos
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Tfus | 301.65 | K | N/A | Sato, Yoshimoto, et al., 1990 | Low-melting form.; DH |
Enthalpy of fusion
| ΔfusH (kJ/mol) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 47.500 | 303.65 | Sato, Yoshimoto, et al., 1990 | High-melting form.; DH |
| 59.9 | 302.3 | Moore, Koelmel, et al., 2007 | AC |
| 47.5 | 303.7 | Domalski and Hearing, 1996 | AC |
Entropy of fusion
| ΔfusS (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 156.4 | 303.65 | Sato, Yoshimoto, et al., 1990 | High-melting; DH |
References
Go To: Top, Phase change data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Sato, Yoshimoto, et al., 1990
Sato, K.; Yoshimoto, N.; Suzuki, M.; Kobayashi, M.; Kaneko, F.,
Structure and transformation in polymorphism of petroselinic acid (cis-w-12-octadecenoic acid),
J. Phys. Chem., 1990, 94, 3180-3185. [all data]
Moore, Koelmel, et al., 2007
Moore, David J.; Koelmel, Donald; Laura, Donna; Bedford, Eilidh,
Infrared spectroscopy and differential scanning calorimetry studies of binary combinations of cis-6-octadecenoic acid and octadecanoic acid,
Chemistry and Physics of Lipids, 2007, 150, 1, 109-115, https://doi.org/10.1016/j.chemphyslip.2007.06.217
. [all data]
Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D.,
Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III,
J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985
. [all data]
Notes
Go To: Top, Phase change data, References
- Symbols used in this document:
Tfus Fusion (melting) point ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.