Tantalum monoxide

• Formula: OTa
• Molecular weight: 196.9473
• IUPAC Standard InChI: InChI=1S/O.Ta/q-2;+2 Copy

  
• IUPAC Standard InChIKey: JMOHEPRYPIIZQU-UHFFFAOYSA-N Copy
• CAS Registry Number: 12035-90-4
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
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• Information on this page:
  • Gas phase thermochemistry data
  • Gas phase ion energetics data
  • Constants of diatomic molecules
  • References
  • Notes
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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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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:
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
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

Constants of diatomic molecules

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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: Klaus P. Huber and Gerhard H. Herzberg

Data collected through June, 1975

Notes

References

Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Constants of diatomic molecules, 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]

Dyke, Ellis, et al., 1987
Dyke, J.M.; Ellis, A.M.; Feher, M.; Morris, A.; Paul, A.J.; Stevens, J.C.H., High-temperature photoelectron spectroscopy - A study of niobium monoxide and tantalum monoxide, J. Chem. Soc. Faraday Trans. 2, 1987, 83, 1555. [all data]

Smoes, Drowart, et al., 1976
Smoes, S.; Drowart, J.; Myers, C.E., Determination of the atomization energies of the molecules TaO(g) TaO₂(g) by the mass-spectrometric Knudsen-cell method, J. Chem. Thermodyn., 1976, 8, 225. [all data]

Ackermann, Rauh, et al., 1976
Ackermann, R.J.; Rauh, E.G.; Thorn, R.J., The thermodynamics of ionization of gaseous oxides; the first ionization potentials of the lanthanide metals and monoxides, J. Chem. Phys., 1976, 65, 1027. [all data]

Inghram, Chupka, et al., 1957
Inghram, M.G.; Chupka, W.A.; Berkowitz, J., Thermodynamics of the Ta-O system: the dissociation energies of TaO and TaO₂, J. Chem. Phys., 1957, 27, 569. [all data]

Cheetham and Barrow, 1967
Cheetham, C.J.; Barrow, R.F., Rotational analysis of electronic bands of gaseous TaO, Trans. Faraday Soc., 1967, 63, 1835. [all data]

Weltner and McLeod, 1965
Weltner, W., Jr.; McLeod, D., Jr., Spectroscopy of TaO and TaO2 in Neon and Argon Matrices at 4° and 20°K, J. Chem. Phys., 1965, 42, 3, 882, https://doi.org/10.1063/1.1696076 . [all data]

Premaswarup, 1955
Premaswarup, D., Vibrational analysis of the tantalum oxide bands, Indian J. Phys., 1955, 29, 109. [all data]

Premaswarup and Barrow, 1957
Premaswarup, D.; Barrow, R.F., Rotational analysis of the tantalum oxide bands, Nature (London), 1957, 180, 602. [all data]

Krikorian and Carpenter, 1965
Krikorian, O.H.; Carpenter, J.H., Enthalpies of formation of gaseous tantalum oxide and tantalum dioxide, J. Phys. Chem., 1965, 69, 4399. [all data]

Notes

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• Symbols used in this document:
  

  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  ΔfH°gas	Enthalpy of formation of gas at standard conditions

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