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iron difluoride


Gas phase thermochemistry data

Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, References, Notes

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
Deltafgas-93.100kcal/molReviewChase, 1998Data last reviewed in September, 1965
Quantity Value Units Method Reference Comment
gas,1 bar63.382cal/mol*KReviewChase, 1998Data last reviewed in September, 1965

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) 3000. - 6000.
A 14.99440
B 0.535214
C -0.154445
D 0.012072
E 0.244254
F -97.30129
G 81.37321
H -93.10000
ReferenceChase, 1998
Comment Data last reviewed in September, 1965

Condensed phase thermochemistry data

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, References, Notes

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
Deltafliquid-161.22kcal/molReviewChase, 1998Data last reviewed in September, 1965
Quantity Value Units Method Reference Comment
liquid,1 bar22.12cal/mol*KReviewChase, 1998Data last reviewed in September, 1965
Quantity Value Units Method Reference Comment
Deltafsolid-168.70kcal/molReviewChase, 1998Data last reviewed in September, 1965
Quantity Value Units Method Reference Comment
solid20.78cal/mol*KReviewChase, 1998Data last reviewed in September, 1965

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) 1373. - 3000.
A 23.50000
B 5.255801×10-11
C -2.871631×10-11
D 4.888531×10-12
E 1.702391×10-12
F -168.2280
G 50.55559
H -161.2210
ReferenceChase, 1998
Comment Data last reviewed in September, 1965

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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View table.

Temperature (K) 298. - 1373.
A 14.70710
B 9.529221
C -5.711191
D 1.172511
E -0.071081
F -173.7010
G 35.58241
H -168.7000
ReferenceChase, 1998
Comment Data last reviewed in September, 1965

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 by: William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Deltasub64.8 ± 0.48kcal/molN/ABardi, Brunetti, et al., 1996 
Deltasub64.5 ± 0.7kcal/molN/AZhuravleva, Alikhanyan, et al., 1976See also Bardi, Brunetti, et al., 1996.

Enthalpy of sublimation

DeltasubH (kcal/mol) Temperature (K) Method Reference Comment
62.9 ± 0.481068.TE,MEBardi, Brunetti, et al., 1996Based on data from 958. - 1178. K.
62.9 ± 0.7995.MEZhuravleva, Alikhanyan, et al., 1976Based on data from 848. - 1142. K. See also Bardi, Brunetti, et al., 1996.

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 by: John E. Bartmess

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

(F- bullet 4294967295F2Fe) + F2Fe = F-

By formula: (F- bullet 4294967295F2Fe) + F2Fe = F-

Quantity Value Units Method Reference Comment
Deltar87.7 ± 3.6kcal/molTDAsBoltalina, Borshchevskii, et al., 1992gas phase; Critical review; value altered from reference due to conversion from electron convention to ion convention
Deltar85.8 ± 2.6kcal/molTDEqBorshchevskii, Boltalina, et al., 1988gas phase; Fluoride Affinity: FeF2 < FeF3 by 22.6±2.6 kcal/mol.; value altered from reference due to conversion from electron convention to ion convention
Deltar89.3 ± 4.1kcal/molTDEqKuznetsov, Korobov, et al., 1986gas phase; value altered from reference due to conversion from electron convention to ion convention
Deltar85.8 ± 2.1kcal/molTDEqSidirov, Borshchevsky, et al., 1986gas phase; Corrections to Sorokin, Sidorov, et al., 1981, better neutral pressure determination; value altered from reference due to conversion from electron convention to ion convention
Deltar105.4 ± 3.3kcal/molTDEqSorokin, Sidorov, et al., 1981gas phase; Fluoride Affinity: 15.3±1.2 kcal < AlF3; value altered from reference due to conversion from electron convention to ion convention

F3Fe- + F2Fe = F5Fe2-

By formula: F3Fe- + F2Fe = F5Fe2-

Quantity Value Units Method Reference Comment
Deltar48.3 ± 8.8kcal/molTDEqSidirov, Borshchevsky, et al., 1986gas phase; value altered from reference due to conversion from electron convention to ion convention
Deltar48.1 ± 1.0kcal/molTDAsSorokin, Sidorov, et al., 1981gas phase; «DELTA»Hf(A-) at 0 K; value altered from reference due to conversion from electron convention to ion convention

Gas phase ion energetics 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:
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess

View reactions leading to F2Fe+ (ion structure unspecified)

Electron affinity determinations

EA (eV) Method Reference Comment
<2.69291TDEqBorshchevskii, Boltalina, et al., 1988B

Ionization energy determinations

IE (eV) Method Reference Comment
11.3 ± 0.3EIKent and Margrave, 1965RDSH

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
FeF+12.6 ± 0.3FEIKent and Margrave, 1965RDSH
Fe+16.5 ± 0.3?EIKent and Margrave, 1965RDSH

Ion clustering data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics 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: John E. Bartmess

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

(F- bullet 4294967295F2Fe) + F2Fe = F-

By formula: (F- bullet 4294967295F2Fe) + F2Fe = F-

Quantity Value Units Method Reference Comment
Deltar87.7 ± 3.6kcal/molTDAsBoltalina, Borshchevskii, et al., 1992gas phase; Critical review; value altered from reference due to conversion from electron convention to ion convention
Deltar85.8 ± 2.6kcal/molTDEqBorshchevskii, Boltalina, et al., 1988gas phase; Fluoride Affinity: FeF2 < FeF3 by 22.6±2.6 kcal/mol.; value altered from reference due to conversion from electron convention to ion convention
Deltar89.3 ± 4.1kcal/molTDEqKuznetsov, Korobov, et al., 1986gas phase; value altered from reference due to conversion from electron convention to ion convention
Deltar85.8 ± 2.1kcal/molTDEqSidirov, Borshchevsky, et al., 1986gas phase; Corrections to Sorokin, Sidorov, et al., 1981, better neutral pressure determination; value altered from reference due to conversion from electron convention to ion convention
Deltar105.4 ± 3.3kcal/molTDEqSorokin, Sidorov, et al., 1981gas phase; Fluoride Affinity: 15.3±1.2 kcal < AlF3; value altered from reference due to conversion from electron convention to ion convention

F3Fe- + F2Fe = F5Fe2-

By formula: F3Fe- + F2Fe = F5Fe2-

Quantity Value Units Method Reference Comment
Deltar48.3 ± 8.8kcal/molTDEqSidirov, Borshchevsky, et al., 1986gas phase; value altered from reference due to conversion from electron convention to ion convention
Deltar48.1 ± 1.0kcal/molTDAsSorokin, Sidorov, et al., 1981gas phase; «DELTA»Hf(A-) at 0 K; value altered from reference due to conversion from electron convention to ion convention

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, 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]

Bardi, Brunetti, et al., 1996
Bardi, Gianpiero; Brunetti, Bruno; Piacente, Vincenzo, Vapor Pressure and Standard Enthalpies of Sublimation of Iron Difluoride, Iron Dichloride, and Iron Dibromide, J. Chem. Eng. Data, 1996, 41, 1, 14-20, https://doi.org/10.1021/je950115w . [all data]

Zhuravleva, Alikhanyan, et al., 1976
Zhuravleva, L.V.; Alikhanyan, A.S.; Sidorov, L.N., Russ. J. Phys. Chem., 1976, 50, 818. [all data]

Boltalina, Borshchevskii, et al., 1992
Boltalina, O.V.; Borshchevskii, A.Y.; Sidorov, L.N., Thermochemistry of 3d Elements Fluorides and Their Negative Ions in Gas Phase, Russ. J. Phys. Chem., 1992, 66, 1223. [all data]

Borshchevskii, Boltalina, et al., 1988
Borshchevskii, A.Ya.; Boltalina, O.V.; Sorokin, I.D.; Sidorov, L.N., Thermochemical Quantities for Gas Phase Iron, Uranium, and Molybdenum Fluorides, and Their Negative Ions., J. Chem. Thermodyn., 1988, 20, 5, 523, https://doi.org/10.1016/0021-9614(88)90080-8 . [all data]

Kuznetsov, Korobov, et al., 1986
Kuznetsov, S.V.; Korobov, M.V.; Savinova, L.N.; Sidirov, L.N., Enthalpy of the addition of the F- ion to copper and iron difluorides, Russ. J. Phys. Chem., 1986, 60, 766. [all data]

Sidirov, Borshchevsky, et al., 1986
Sidirov, L.N.; Borshchevsky, A.Ya.; Boltalina, O.V.; Sorokin, I.D.; Skokan, E.V., Electron affinities of gaseous iron fluorides and dimers, Int. J. Mass Spectrom. Ion Processes, 1986, 73, 1. [all data]

Sorokin, Sidorov, et al., 1981
Sorokin, I.D.; Sidorov, L.N.; Nikitin, M.I.; Skokan, E.V., Mass-spectrometric determination of the enthalpies of dissociation of gaseous complex fluorides into neutral and charged particles. V. Heats of formation of FeF3- and FeF4-, Int. J. Mass Spectrom. Ion Phys., 1981, 41, 45. [all data]

Kent and Margrave, 1965
Kent, R.A.; Margrave, J.L., Mass spectrometric studies at high temperatures. VIII. The sublimation pressure of iron(II) fluoride, J. Am. Chem. Soc., 1965, 87, 4754. [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, References