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rhodium carbide


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

Quantity Value Units Method Reference Comment
DeltafH(+) ion,0K312.kcal/molN/AN/A 

Ionization energy determinations

IE (eV) Method Reference Comment
9.2 ± 1.0EIHaque and Gingerich, 1981LLK
9.2 ± 1.0EIHaque and Gingerich, 1979LLK
7.2 ± 0.5EIGingerich and Gupta, 1978LLK
8.6 ± 0.4EICocke and Gingerich, 1974LLK
8.1 ± 0.6EICocke, Gingerich, et al., 1973LLK
8.6 ± 0.4EICocke and Gingerich, 1972LLK

Constants of diatomic molecules

Go To: Top, 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: Klaus P. Huber and Gerhard H. Herzberg

Data collected through May, 1975

Symbols used in the table of constants
SymbolMeaning
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)
Diatomic constants for 103Rh12C
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
Additional systems observed in matrix absorption. Brom, Graham, et al., 1972
D 2Sigma(-) (21756) (782) 1   (0.482) 1 2     (1.804)  
Lagerqvist and Scullman, 1966
C 2Sigma(+) 21439.2 927.8 3 Z 13.73  0.5510 3 4 0.0060  (1.0E-6)  1.6873 C larrow X R 21376.0 3 Z
Lagerqvist, Neuhaus, et al., 1965; missing citation; Brom, Graham, et al., 1972
B 2Sigma(+)     [0.5067] 5 6   (0.8E-6)  [1.7595] B larrow X R 21361.0 5 Z
Lagerqvist, Neuhaus, et al., 1965; Lagerqvist and Scullman, 1966; Brom, Graham, et al., 1972
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
A 2Pir 10242.75 7 939.12 Z 5.48 0.021 0.57149 0.00428  0.832E-6 3.2E-9 1.6554 A lrarrow X R 10187.24 8 Z
Kaving and Scullman, 1969; Brom, Graham, et al., 1972
9462.94 949.41 Z 5.357  0.57329 9 0.00426  0.826E-6 -1.9E-9 1.6554 A lrarrow X R 9412.60 8 Z
X 2Sigma(+) 0 1049.87 Z 4.937  0.6027 10 0.00396  0.783E-6 1.2E-8 1.6133 11  

Notes

1Vibrational numbering uncertain. All information based on perturbations in C 2Sigma(+).
2Spin-splitting constant gamma ~ -1.6.
3Strong perturbations produced by interaction with B 2Sigma+, and weaker perturbations produced by D 2Sigma(-). The constants in the table are deperturbed values. The observed origin of the 0-0 band is at 21452.0 cm-1.
4Spin-splitting constant gamma ~ -0.03.
5Vibrational numbering uncertain. Strong interaction with v=0 of C 2Sigma(+). The constants in the table are deperturbed values. The observed band origin is at 21285.0 cm-1.
6Spin splitting constant gamma = +1.00.
7Av= + 781.07 - 10.50(v+1/2); also J-dependent terms.
8J'=0 relative to N"=0.
9Lambda-type doubling; Deltavfe(2Pi1/2) = (+)[0.0177 + 0.00l6(v+1/2)](J+1/2).
10Spin-splitting constant gamma = -0.065.
11ESR sp. 13
12Thermochemical value (mass-spectrometry) Auwera-Mahieu and Drowart, 1967, Cocke and Gingerich, 1972.
13In rare gas matrices at 4 K Brom, Graham, et al., 1972.

References

Go To: Top, Gas phase ion energetics 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.

Haque and Gingerich, 1981
Haque, R.; Gingerich, K.A., Identification and atomization energies of gaseous molecules ScC2, ScC3, ScC4, ScC5, and ScC6 by high temperature mass spectrometry, J. Chem. Phys., 1981, 74, 6407. [all data]

Haque and Gingerich, 1979
Haque, R.; Gingerich, K.A., Investigation of the thermodynamic stabilities of the gaseous molecules RhScC, RhScC2 RhYC2 by Knudsen effusion mass spectrometry, J. Chem. Soc. Faraday Trans. 2, 1979, 985. [all data]

Gingerich and Gupta, 1978
Gingerich, K.A.; Gupta, K.A., Dissociation energies of the molecules RhTh and RhU from high temperature mass spectrometry and predicted thermodynamic stabilities of selected diatomic actinide-platinum metal intermetallic molecules, J. Chem. Phys., 1978, 69, 505. [all data]

Cocke and Gingerich, 1974
Cocke, D.L.; Gingerich, K.A., Thermodynamic investigation of the gaseous molecules TiRh, Rh2, and Ti2Rh by mass spectrometry, J. Chem. Phys., 1974, 60, 1958. [all data]

Cocke, Gingerich, et al., 1973
Cocke, D.L.; Gingerich, K.A.; Kordis, J., Determination of the high bond dissociation energy of the molecule LaRh, High Temp. Sci., 1973, 5, 474. [all data]

Cocke and Gingerich, 1972
Cocke, D.L.; Gingerich, K.A., Determination of the heats of atomization of the molecules RhC2, RhC, and TiC2 by high temperature mass spectrometry, J. Chem. Phys., 1972, 57, 3654. [all data]

Brom, Graham, et al., 1972
Brom, J.M., Jr.; Graham, W.R.M.; Weltner, W., Jr., ESR and optical spectroscopy of the RhC molecule at 4°K, J. Chem. Phys., 1972, 57, 4116. [all data]

Lagerqvist and Scullman, 1966
Lagerqvist, A.; Scullman, R., Rotational analysis of the spectrum of RhC in the 4000-5000 Å region, Ark. Fys., 1966, 32, 479. [all data]

Lagerqvist, Neuhaus, et al., 1965
Lagerqvist, A.; Neuhaus, H.; Scullman, R., Das Bandenspektrum des RhC, Z. Naturforsch. A, 1965, 20, 751. [all data]

Kaving and Scullman, 1969
Kaving, B.; Scullman, R., The spectrum of RhC in the near infrared region, J. Mol. Spectrosc., 1969, 32, 475. [all data]

Auwera-Mahieu and Drowart, 1967
Auwera-Mahieu, A.V.; Drowart, J., The dissociation energies of the molecules PtC and RhC, Chem. Phys. Lett., 1967, 1, 311-313. [all data]


Notes

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