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molybdenum dioxide


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
Deltafgas-8.31kJ/molReviewChase, 1998Data last reviewed in September, 1978
Quantity Value Units Method Reference Comment
gas,1 bar276.98J/mol*KReviewChase, 1998Data last reviewed in September, 1978

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 (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 298. - 1300.1300. - 6000.
A 35.0860662.89514
B 50.57075-5.131048
C -41.661131.765938
D 12.06327-0.140104
E -0.234078-3.598915
F -21.46518-36.22252
G 304.7948341.1604
H -8.314027-8.314027
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in September, 1978 Data last reviewed in September, 1978

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
Deltafsolid-587.85kJ/molReviewChase, 1998Data last reviewed in September, 1978
Quantity Value Units Method Reference Comment
solid46.45J/mol*KReviewChase, 1998Data last reviewed in September, 1978

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 (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 298. - 3000.
A 65.66788
B 11.56089
C 5.427778
D 0.000256
E -1.217687
F -612.0815
G 115.3813
H -587.8520
ReferenceChase, 1998
Comment Data last reviewed in September, 1978

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

Ionization energy determinations

IE (eV) Method Reference Comment
9.7 ± 0.5EIYamdagni, Pupp, et al., 1970RDSH
9.2EIDrowart, Exsteen, et al., 1964RDSH
9.4 ± 0.6EIDeMaria, Burns, et al., 1960RDSH

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


Vib. 
sym. 
 No.   Approximate 
 type of mode 
 cm-1   Med.   Method   References

a1 1 Sym. stretch 950.7 Ne IR Hewett, Newton, et al., 1975
Zhou and Andrews, 1999
1 Sym. stretch 939.3 Ar IR Hewett, Newton, et al., 1975
Almond and Downs, 1988
Bare, Souter, et al., 1998
b2 3 Asym. stretch 901.3 Ne IR Hewett, Newton, et al., 1975
Zhou and Andrews, 1999
3 Asym. stretch 885.5 Ar IR Hewett, Newton, et al., 1975
Almond and Downs, 1988
Bare, Souter, et al., 1998

Additional references: Jacox, 1998, page 175; Jacox, 2003, page 104


References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Gas phase ion energetics data, Vibrational and/or electronic energy levels, NIST Free Links, 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]

Yamdagni, Pupp, et al., 1970
Yamdagni, R.; Pupp, C.; Porter, R.F., Mass spectrometric study of the evaporation of lithium and sodium molybdates and tungstates, J. Inorg. Nucl. Chem., 1970, 32, 3509. [all data]

Drowart, Exsteen, et al., 1964
Drowart, J.; Exsteen, G.; Verhaegen, G., Mass spectrometric determination of the dissociation energy of the molecules MgO, CaO, SrO and Sr2O, J. Chem. Soc. Faraday Trans., 1964, 60, 1920. [all data]

DeMaria, Burns, et al., 1960
DeMaria, G.; Burns, R.P.; Drowart, J.; Inghram, M.G., Mass spectrometric study of gaseous molybdenum, tungsten, and uranium oxides, J. Chem. Phys., 1960, 32, 1373. [all data]

Hewett, Newton, et al., 1975
Hewett, W.D., Jr.; Newton, J.H.; Weltner, W., Jr., Absorption spectra of molybdenum oxide molecules and molybdenum atoms in neon and argon matrices at 4.deg.K, J. Phys. Chem., 1975, 79, 24, 2640, https://doi.org/10.1021/j100591a014 . [all data]

Zhou and Andrews, 1999
Zhou, M.; Andrews, L., Infrared spectra and density functional calculations of the CrO[sub 2][sup -], MoO[sub 2][sup -], and WO[sub 2][sup -] molecular anions in solid neon, J. Chem. Phys., 1999, 111, 9, 4230, https://doi.org/10.1063/1.479721 . [all data]

Almond and Downs, 1988
Almond, M.J.; Downs, A.J., J. Chem. Soc., 1988, Dalton Trans. 809. [all data]

Bare, Souter, et al., 1998
Bare, W.D.; Souter, P.F.; Andrews, L., Reactions of Laser-Ablated Molybdenum and Tungsten Atoms with Dioxygen. Resolved Infrared Spectra of Natural Molybdenum and Tungsten Isotopic Oxides in Argon Matrices, J. Phys. Chem. A, 1998, 102, 43, 8279, https://doi.org/10.1021/jp9826266 . [all data]

Jacox, 1998
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules: supplement A, J. Phys. Chem. Ref. Data, 1998, 27, 2, 115-393, https://doi.org/10.1063/1.556017 . [all data]

Jacox, 2003
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules: supplement B, J. Phys. Chem. Ref. Data, 2003, 32, 1, 1-441, https://doi.org/10.1063/1.1497629 . [all data]


Notes

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