9,9'-Bi-9H-fluorene
- Formula: C26H18
- Molecular weight: 330.4211
- IUPAC Standard InChI: InChI=1S/C26H18/c1-5-13-21-17(9-1)18-10-2-6-14-22(18)25(21)26-23-15-7-3-11-19(23)20-12-4-8-16-24(20)26/h1-16,25-26H
- IUPAC Standard InChIKey: QXAIDADUIMVTPS-UHFFFAOYSA-N
- CAS Registry Number: 1530-12-7
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: 9,9'-Bifluorene; Bifluorenyl; 9,9'-Bifluorenyl; Bisfluorenyl
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Gas phase thermochemistry data
Go To: Top, Condensed phase thermochemistry data, Phase change data, 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:
DRB - Donald R. Burgess, Jr.
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | 78.9 ± 1.0 | kcal/mol | Review | Roux, Temprado, et al., 2008 | There are insufficient literature values to properly evaluate the data and insufficient information to construct thermochemical cycles or estimate values for comparison, and one must rely solely upon reported uncertainities and the quality of the measurements. In general, the evaluated uncertainty limits are on the order of (3 to 9) kJ/mol.; DRB |
| ΔfH°gas | 78.89 ± 0.54 | kcal/mol | Ccr | Rakus, Verevkin, et al., 1994 | ALS |
Condensed phase thermochemistry data
Go To: Top, Gas phase thermochemistry data, Phase change data, 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:
DRB - Donald R. Burgess, Jr.
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°solid | 47.20 ± 0.84 | kcal/mol | Review | Roux, Temprado, et al., 2008 | There are insufficient literature values to properly evaluate the data and insufficient information to construct thermochemical cycles or estimate values for comparison, and one must rely solely upon reported uncertainities and the quality of the measurements. In general, the evaluated uncertainty limits are on the order of (3 to 9) kJ/mol.; DRB |
| ΔfH°solid | 47.20 ± 0.46 | kcal/mol | Ccr | Rakus, Verevkin, et al., 1994 | crystal phase; ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°solid | -3107.50 ± 0.18 | kcal/mol | Ccr | Rakus, Verevkin, et al., 1994 | crystal phase; Corresponding ΔfHºsolid = 47.337 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
Phase change data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, 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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
DRB - Donald R. Burgess, Jr.
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Tfus | 518.35 | K | N/A | Schuyer, Blom, et al., 1953 | Uncertainty assigned by TRC = 1. K; TRC |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔsubH° | 31.69 ± 0.55 | kcal/mol | Review | Roux, Temprado, et al., 2008 | There are sufficient literature values to make a qualified recommendation where the suggested value is in good agreement with values predicted using thermochemical cycles or from reliable estimates. In general, the evaluated uncertainty limits are on the order of (2 to 4) kJ/mol.; DRB |
| ΔsubH° | 31.695 | kcal/mol | V | Rakus, Verevkin, et al., 1994 | crystal phase; ALS |
| ΔsubH° | 31.69 | kcal/mol | N/A | Rakus, Verevkin, et al., 1994 | DRB |
| ΔsubH° | 31.69 ± 0.26 | kcal/mol | N/A | Rakus, Verevkin, et al., 1994 | AC |
Enthalpy of vaporization
| ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 22.9 | 383. to 408. | B | Rakus, Verevkin, et al., 1994 | AC |
Enthalpy of sublimation
| ΔsubH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 31.50 ± 0.26 | 395. | T | Rakus, Verevkin, et al., 1994 | Based on data from 383. to 408. K.; AC |
Enthalpy of fusion
| ΔfusH (kcal/mol) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 8.82 | 519.2 | Rakus, Verevkin, et al., 1994 | AC |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Roux, Temprado, et al., 2008
Roux, M.V.; Temprado, M.; Chickos, J.S.; Nagano, Y.,
Critically Evaluated Thermochemical Properties of Polycyclic Aromatic Hydrocarbons,
J. Phys. Chem. Ref. Data, 2008, 37, 4, 1855-1996. [all data]
Rakus, Verevkin, et al., 1994
Rakus, K.; Verevkin, S.P.; Schatzer, J.; Beckhaus, H.-D.; Ruchardt, C.,
Thermochemistry and thermal decomposition of 9,9'-bifluorenyl and 9,9'-dimethyl-9,9'-bifluorenyl - the stabilization energy of 9-fluorenyl radicals,
Chem. Ber., 1994, 127, 1095-1103. [all data]
Schuyer, Blom, et al., 1953
Schuyer, J.; Blom, L.; Van Krevelen, D.W.,
Molar refraction of condensed aromatic compounds.,
Trans. Faraday Soc., 1953, 49, 1391. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, References
- Symbols used in this document:
Tfus Fusion (melting) point ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions ΔfusH Enthalpy of fusion ΔsubH Enthalpy of sublimation ΔsubH° Enthalpy of sublimation at standard conditions ΔvapH Enthalpy of vaporization - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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