sodium fluoride
- Formula: FNa
- Molecular weight: 41.9881725
- IUPAC Standard InChI: InChI=1S/FH.Na/h1H;/q;+1/p-1
- IUPAC Standard InChIKey: PUZPDOWCWNUUKD-UHFFFAOYSA-M
- CAS Registry Number: 7681-49-4
- Chemical structure:
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Gas 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.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -69.419 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1968 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 52.005 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1968 |
Gas Phase Heat Capacity (Shomate Equation)
Cp° = A + B*t + C*t2 + D*t3 +
E/t2
H° − H°298.15= A*t + B*t2/2 +
C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 −
E/(2*t2) + G
Cp = heat capacity (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 3500. to 6000. |
|---|---|
| A | 8.832601 |
| B | 0.256658 |
| C | -0.025239 |
| D | 0.002151 |
| E | -0.066425 |
| F | -72.28740 |
| G | 62.24589 |
| H | -69.42001 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1968 |
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.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°liquid | -130.54 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1968 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 17.56 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1968 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔfH°solid | -137.52 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1968 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 12.24 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1968 |
Liquid Phase Heat Capacity (Shomate Equation)
Cp° = A + B*t + C*t2 + D*t3 +
E/t2
H° − H°298.15= A*t + B*t2/2 +
C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 −
E/(2*t2) + G
Cp = heat capacity (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 1269. to 3500. |
|---|---|
| A | 15.87799 |
| B | -0.542658 |
| C | 0.167616 |
| D | -0.017733 |
| E | 2.159434 |
| F | -134.6692 |
| G | 34.66468 |
| H | -130.5459 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1968 |
Solid Phase Heat Capacity (Shomate Equation)
Cp° = A + B*t + C*t2 + D*t3 +
E/t2
H° − H°298.15= A*t + B*t2/2 +
C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 −
E/(2*t2) + G
Cp = heat capacity (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 298. to 1269. |
|---|---|
| A | 12.66783 |
| B | -1.422598 |
| C | 3.002749 |
| D | 0.090398 |
| E | -0.116901 |
| F | -141.6525 |
| G | 27.20220 |
| H | -137.5201 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1968 |
Reaction 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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
4 +
= 2
+
+ 3
By formula: 4Na + C2ClF3 = 2C + ClNa + 3FNa
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -376.7 ± 1.3 | kcal/mol | Cm | Kolesov, Zenkov, et al., 1963 | gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -368.8 ± 1.3 kcal/mol; ALS |
2 +
=
+
+
By formula: 2HNaO + C2H3FO = C2H3NaO2 + FNa + H2O
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -13.42 ± 0.02 | kcal/mol | Cm | Pritchard and Skinner, 1950 | liquid phase; Corrected for CODATA value of ΔfH; HF(100); ALS |
| ΔrH° | -42.4 | kcal/mol | Cm | Carson and Skinner, 1949 | liquid phase; ALS |
By formula: Be2F5- + FNa = (Be2F5- • FNa)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 65.2 ± 2.5 | kcal/mol | N/A | Nikitin, Sorokin, et al., 1980 | gas phase; value altered from reference due to conversion from electron convention to ion convention; B |
+ 4
= 4
+ 8
By formula: C4F8 + 4Na = 4C + 8FNa
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -714.5 ± 2.2 | kcal/mol | Ccb | Kolesov, Talakin, et al., 1968 | gas phase; Correction of Kolesov, Talakin, et al., 1964; ALS |
By formula: (F2Sc+ • 2FNa) + FNa = (F2Sc+ • 3FNa)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 72. | kcal/mol | MS | Tsirlina, Gusarov, et al., 1986 | gas phase; Knudsen cell; M |
By formula: (F2Sc+ • 3FNa) + FNa = (F2Sc+ • 4FNa)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 67. | kcal/mol | MS | Tsirlina, Gusarov, et al., 1986 | gas phase; Knudsen cell; M |
( •
) +
= (
• 2
)
By formula: (Na+ • FNa) + FNa = (Na+ • 2FNa)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 47. | kcal/mol | MS | Tsirlina, Gusarov, et al., 1986 | gas phase; Knudsen cell; M |
By formula: (F2Sc+ • FNa) + FNa = (F2Sc+ • 2FNa)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 83. | kcal/mol | MS | Tsirlina, Gusarov, et al., 1986 | gas phase; Knudsen cell; M |
+
= (
•
)
By formula: Na+ + FNa = (Na+ • FNa)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 62.7 | kcal/mol | MS | Tsirlina, Gusarov, et al., 1986 | gas phase; Knudsen cell; M |
4 +
=
+ 4
By formula: 4Na + CF4 = C + 4FNa
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -325.5 ± 2.2 | kcal/mol | Ccb | Vorob'ev and Skuratov, 1960 | gas phase; ALS |
+ 4
= 4
+ 2
By formula: C2F4 + 4Na = 4FNa + 2C
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -385.0 ± 1.1 | kcal/mol | Cm | Kolesov, Zenkov, et al., 1962 | gas phase; ALS |
8 +
= 3
+ 8
By formula: 8Na + C3F8 = 3C + 8FNa
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -660.0 ± 1.7 | kcal/mol | Ccb | Kolesov, Talakin, et al., 1967 | gas phase; ALS |
Constants of diatomic molecules
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction 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 by: Klaus P. Huber and Gerhard H. Herzberg
Data collected through March, 1977
| Symbol | Meaning |
|---|---|
| State | electronic state and / or symmetry symbol |
| Te | minimum electronic energy (cm-1) |
| ωe | vibrational constant – first term (cm-1) |
| ωexe | vibrational constant – second term (cm-1) |
| ωeye | vibrational constant – third term (cm-1) |
| Be | rotational constant in equilibrium position (cm-1) |
| αe | rotational constant – first term (cm-1) |
| γe | rotation-vibration interaction constant (cm-1) |
| De | centrifugal distortion constant (cm-1) |
| βe | rotational constant – first term, centrifugal force (cm-1) |
| re | internuclear distance (Å) |
| Trans. | observed transition(s) corresponding to electronic state |
| ν00 | position of 0-0 band (units noted in table) |
| State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| The electron energy loss spectrum has peaks at 5.7, 7.7, (18.5), 32.5 eV. | ||||||||||||
| ↳Geiger and Pfeiffer, 1968 | ||||||||||||
| Continuous absorption above 41000 cm-1. | ||||||||||||
| ↳Muller, 1927 | ||||||||||||
| A 1 | A ← X | |||||||||||
| ↳Barrow and Caunt, 1953 | ||||||||||||
| X 1Σ+ | 0 | 536 2 3 (Z) | 3.4 2 | 0.43690127 | 0.00455869 | 2.335E-5 | 1.161E-6 | 1.925947 4 | ||||
| ↳Ritchie and Lew, 1964; Baikov and Vasilevskii, 1967 | ||||||||||||
| Rotation sp. | ||||||||||||
| ↳Bauer and Lew, 1963; Hollowell, Hebert, et al., 1964; Veazey and Gordy, 1965 | ||||||||||||
| Mol. beam rf electric 5 | ||||||||||||
| ↳Hollowell, Hebert, et al., 1964; Graff and Werth, 1965 | ||||||||||||
| and magnetic reson. | ||||||||||||
| ↳Zeiger and Bolef, 1952; Logan, Cote, et al., 1952; Cote and Kusch, 1953 | ||||||||||||
Notes
| 1 | Fluxuation bands in absorption from 39350 to 36600 cm-1. |
| 2 | From the IR spectrum Ritchie and Lew, 1964, Baikov and Vasilevskii, 1967. |
| 3 | For IR frequencies in low-temperature rare gas matrices, see Snelson and Pitzer, 1963. |
| 4 | Rot.-vibr. sp. 3 |
| 5 | μel[D] = 8.1235 + 0.0644(v+1/2) + 0.00037(v+1/2)2, v≤2 Hollowell, Hebert, et al., 1964, Graff and Werth, 1965; see also Bauer and Lew, 1963. Na quadrupole coupling constant, dependence on v Bauer and Lew, 1963, Hollowell, Hebert, et al., 1964, Graff and Werth, 1965; earlier, less accurate values by the magnetic resonance method Zeiger and Bolef, 1952, Logan, Cote, et al., 1952, Cote and Kusch, 1953. |
| 6 | Value recommended by Ham, 1974 and based on the highest Na levels observed in chemiluminescent emission from the reaction Na2 + F > NaF + Na*. It is in agreement with the flame-photometric value (5.25 eV) of Bulewicz, Phillips, et al., 1961, but substantially higher than the thermochemical value (4.93 eV) given by Brewer and Brackett, 1961 or derived from the data in Stull and Prophet, 1971. |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Constants of diatomic molecules, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Chase, 1998
Chase, M.W., Jr.,
NIST-JANAF Themochemical Tables, Fourth Edition,
J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]
Kolesov, Zenkov, et al., 1963
Kolesov, V.P.; Zenkov, I.D.; Skuratov, S.M.,
Standard enthalpy of formation of chlorotrifluoroethylene,
Russ. J. Phys. Chem. (Engl. Transl.), 1963, 37, 115-116. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]
Pritchard and Skinner, 1950
Pritchard, H.O.; Skinner, H.A.,
The heat of hydrolysis of acetyl fluoride,
J. Chem. Soc., 1950, 1099. [all data]
Carson and Skinner, 1949
Carson, A.S.; Skinner, H.A.,
201. Carbon-halogen bond energies in the acetyl halides,
J. Chem. Soc., 1949, 936-939. [all data]
Nikitin, Sorokin, et al., 1980
Nikitin, M.I.; Sorokin, I.D.; Skokan, E.V.; Sidorov, L.N.,
Negative Ions in the Saturated Vapors of the Potassium Fluoride - Hafnium Tetrafluoride and Potassium Fluoride - Beryllium Difluoride Systems,
Russ. J. Phys. Chem., 1980, 54, page]. [all data]
Kolesov, Talakin, et al., 1968
Kolesov, V.P.; Talakin, O.G.; Skuratov, S.M.,
Enthalpy of formation of some specimens of amorphous carbon,
Russ. J. Phys. Chem. (Engl. Transl.), 1968, 42, 1218-1220. [all data]
Kolesov, Talakin, et al., 1964
Kolesov, V.P.; Talakin, O.G.; Skuratov, S.M.,
Standard enthalpy of formation of perfluorocyclobutane,
Russ. J. Phys. Chem. (Engl. Transl.), 1964, 38, 930-931. [all data]
Tsirlina, Gusarov, et al., 1986
Tsirlina, E.A.; Gusarov, A.V.; Gorokhov, L.N.,
High Temp., 1986, 14, 1064. [all data]
Vorob'ev and Skuratov, 1960
Vorob'ev, A.F.; Skuratov, S.M.,
Standard enthalpies of formation of CF4,
Zh. Neorg. Khim., 1960, 5, 1398-1401. [all data]
Kolesov, Zenkov, et al., 1962
Kolesov, V.P.; Zenkov, I.D.; Skuratov, S.M.,
The standard enthalpy of formation of tetrafluoroethylene,
Russ. J. Phys. Chem. (Engl. Transl.), 1962, 36, 45-47. [all data]
Kolesov, Talakin, et al., 1967
Kolesov, V.P.; Talakin, O.G.; Skuratov, S.M.,
Standard enthalpy of formation of perfluoropropane and enthalpies of formation of normal perfluoroalkanes,
Vestn. Mosk. Univ. Khim., 1967, 22, 38-42. [all data]
Geiger and Pfeiffer, 1968
Geiger, J.; Pfeiffer, H.-C.,
Untersuchung der Anregung innerer Elektronen von Alkalihalogenidmolekulen im Energieverlustspektrum von 25 keV-Elektronen,
Z. Phys., 1968, 208, 105. [all data]
Muller, 1927
Muller, L.A.,
4. absorptionsspektren der alkalihalogenide in wasseriger losung und im dampf,
Ann. Phys. (Leipzig), 1927, 82, 39. [all data]
Barrow and Caunt, 1953
Barrow, R.F.; Caunt, A.D.,
The ultra-violet absorption spectra of some gaseous alkali-metal halides and the dissociation energy of fluorine,
Proc. R. Soc. London A, 1953, 219, 120. [all data]
Ritchie and Lew, 1964
Ritchie, R.K.; Lew, H.,
Infrared spectra of NaF and KF,
Can. J. Phys., 1964, 42, 43. [all data]
Baikov and Vasilevskii, 1967
Baikov, V.I.; Vasilevskii, K.P.,
Infrared spectra of sodium, potassium, rubidium, and cesium fluoride vapors,
Opt. Spectrosc. Engl. Transl., 1967, 22, 198, In original 364. [all data]
Bauer and Lew, 1963
Bauer, R.K.; Lew, H.,
Rotational constants and electric dipole moment of NaF,
Can. J. Phys., 1963, 41, 1461. [all data]
Hollowell, Hebert, et al., 1964
Hollowell, C.D.; Hebert, A.J.; Street, K., Jr.,
Radio-frequency and microwave spectra of NaF by the molecular-beam electric-resonance method,
J. Chem. Phys., 1964, 41, 3540. [all data]
Veazey and Gordy, 1965
Veazey, S.E.; Gordy, W.,
Millimeter-wave molecular-beam spectroscopy: alkali fluorides,
Phys. Rev. A: Gen. Phys., 1965, 138, 1303. [all data]
Graff and Werth, 1965
Graff, G.; Werth, G.,
Gleichzeitige Messung von Hyperfeinstruktur, Starkeffekt und Zeemaneffekt des 23Na19F mit einer Molekulstrahl-Resonanzapparatur,
Z. Phys., 1965, 183, 223. [all data]
Zeiger and Bolef, 1952
Zeiger, H.J.; Bolef, D.I.,
Molecular beam magnetic resonance spectra of TlCl35 and TlCl37 at zero field,
Phys. Rev., 1952, 85, 788. [all data]
Logan, Cote, et al., 1952
Logan, R.A.; Cote, R.E.; Kusch, P.,
The sign of the quadrupole interaction energy in diatomic molecules,
Phys. Rev., 1952, 86, 280. [all data]
Cote and Kusch, 1953
Cote, R.E.; Kusch, P.,
Low frequency resonances in the spectra of diatomic molecules,
Phys. Rev., 1953, 90, 103. [all data]
Snelson and Pitzer, 1963
Snelson, A.; Pitzer, K.S.,
Infrared spectra by matrix isolation of lithium fluoride, lithium chloride and sodium fluoride,
J. Phys. Chem., 1963, 67, 882. [all data]
Ham, 1974
Ham, D.O.,
Energy limits in chemiluminescent, atom transfer reactions: bond dissociation energy of NaF,
J. Chem. Phys., 1974, 60, 1802. [all data]
Bulewicz, Phillips, et al., 1961
Bulewicz, E.M.; Phillips, L.F.; Sugden, T.M.,
Determination of dissociation constants and heats of formation of simple molecules by flame photometry. Part 8. Stabilities of the gaseous diatomic halides of certain metals,
Trans. Faraday Soc., 1961, 57, 921. [all data]
Brewer and Brackett, 1961
Brewer, L.; Brackett, E.,
The dissociation energies of gaseous alkali halides,
Chem. Rev., 1961, 61, 425. [all data]
Stull and Prophet, 1971
Stull, D.R.; Prophet, H.,
JANAF Thermochemical Tables. Second Edition, Office of SRD (NSRDS-NBS 37), Washington, D.C., 1971, 0. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Constants of diatomic molecules, References
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) S°liquid,1 bar Entropy of liquid at standard conditions (1 bar) S°solid Entropy of solid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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