beryllium fluoride

• Formula: BeF₂
• Molecular weight: 47.008988
• CAS Registry Number: 7787-49-7
• Information on this page:
  • Gas phase thermochemistry data
  • Reaction thermochemistry data
  • Gas phase ion energetics data
  • Ion clustering data
  • Vibrational and/or electronic energy levels
  • References
  • Notes
• Other data available:
  • Condensed phase thermochemistry data
  • Phase change data
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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.

Gas Phase Heat Capacity (Shomate Equation)

C_p° = 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
    C_p = heat capacity (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

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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

 + BeF₂ = ( • BeF₂)

By formula: F^- + BeF₂ = (F^- • BeF₂)

AlF₄^- + BeF₂ = (AlF₄^- • BeF₂)

By formula: AlF₄^- + BeF₂ = (AlF₄^- • BeF₂)

Be₂F₅^- + BeF₂ = (Be₂F₅^- • BeF₂)

By formula: Be₂F₅^- + BeF₂ = (Be₂F₅^- • BeF₂)

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:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

Ionization energy determinations

Appearance energy determinations

Ion clustering 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. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

AlF₄^- + BeF₂ = (AlF₄^- • BeF₂)

By formula: AlF₄^- + BeF₂ = (AlF₄^- • BeF₂)

Be₂F₅^- + BeF₂ = (Be₂F₅^- • BeF₂)

By formula: Be₂F₅^- + BeF₂ = (Be₂F₅^- • BeF₂)

 + BeF₂ = ( • BeF₂)

By formula: F^- + BeF₂ = (F^- • BeF₂)

Vibrational and/or electronic energy levels

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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: Marilyn E. Jacox

State:   X

Additional references: Jacox, 1994, page 83; Buchler, Stauffer, et al., 1964

Notes

References

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, Vibrational and/or electronic energy levels, 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]

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]

Farber and Srivastava, 1974
Farber, M.; Srivastava, R.D., Dissociation energies of BeF and BeCl and the heat of formation of BeClF, J. Chem. Soc. Faraday Trans. 1, 1974, 70, 1581. [all data]

Hildenbrand and Murad, 1966
Hildenbrand, D.L.; Murad, E., Mass-spectrometric determination of the dissociation energy of beryllium monofluoride, J. Chem. Phys., 1966, 44, 1524. [all data]

Hildenbrand and Theard, 1965
Hildenbrand, D.L.; Theard, L.P., Effusion studies, mass spectra, and thermodynamics of beryllium fluoride vapor, J. Chem. Phys., 1965, 42, 3230. [all data]

Yu, Shayesteh, et al., 2005
Yu, S.; Shayesteh, A.; Bernath, P.F.; Koput, J., The vibration-rotation emission spectrum of hot BeF[sub 2], J. Chem. Phys., 2005, 123, 13, 134303, https://doi.org/10.1063/1.2039085 . [all data]

Snelson, 1966
Snelson, A., Infrared Spectra of Some Alkaline Earth Halides by the Matrix Isolation Technique, J. Phys. Chem., 1966, 70, 10, 3208, https://doi.org/10.1021/j100882a031 . [all data]

Frum, Engleman, et al., 1991
Frum, C.I.; Engleman, R., Jr.; Bernath, P.F., Fourier transform emission spectroscopy of BeF2 at 6.5 μm, J. Chem. Phys., 1991, 95, 3, 1435, https://doi.org/10.1063/1.461056 . [all data]

Jacox, 1994
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules, American Chemical Society, Washington, DC, 1994, 464. [all data]

Buchler, Stauffer, et al., 1964
Buchler, A.; Stauffer, J.L.; Klemperer, W., None, J. Am. Chem. Soc., 1964, 86, 21, 4544, https://doi.org/10.1021/ja01075a007 . [all data]

Notes

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• Symbols used in this document:
  

  AE	Appearance energy
  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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