iridium carbide

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 February, 1975

Symbols used in the table of constants
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 (193)Ir12C
Two unidentified bands at 15846 and 16504 cm-1.
Jansson and Scullman, 1970
L 2Phi7/2 (20940) (810)   [0.4812]   6.8E-7  1.7609 L lrarrow X1 R 20816.52 1 Z
Jansson, Scullman, et al., 1969; Jansson and Scullman, 1970
K 2Pi3/2 19349 [832.7] Z   0.5053 0.0051  7.4E-7  1.7184 K lrarrow X1 R 19236.64 1 Z
missing citation; Jansson and Scullman, 1970
E2 2Delta3/2 x2 + (12180) (960)   0.5148 0.0043  [5.9E-7] 2  1.7025 E2 rarrow X2 R 12145.3 3 Z
Jansson and Scullman, 1970
E1 2Delta5/2 15149.2 963.9 Z 5.44  0.5132 0.0040  6.2E-7  1.7052 E1 lrarrow X1 R 15100.89 3 Z
missing citation
D 2Phi7/2 14413.5 935.7 Z 5.96  0.5053 0.0038  5.9E-7  1.7184 D lrarrow X1 R 14350.95 3 Z
missing citation
X2 2Delta3/2 x2 4 (1030)   0.5272 0.0035  5.5E-7  1.6824  
X1 2Delta5/2 0 1060.1 Z 4.53  0.5268 0.0032  5.2E-7  1.6830  


1J'=0 relative to J"=0, calculated from the data in Jansson and Scullman, 1970.
2D1= 5.4E-7.
3J'=0 relative to J"=0. A different definition of the band origins is used in Jansson and Scullman, 1970.
4x2 ~3200 cm-1; see Jansson and Scullman, 1970.
5Thermochemical value (mass-spectrom.) McIntyre, Auwera-Mahieu, et al., 1968, Gingerich, 1973.


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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Jansson and Scullman, 1970
Jansson, K.; Scullman, R., Two new band systems of the spectrum of IrC in the region 6600-8500 Å, J. Mol. Spectrosc., 1970, 36, 248. [all data]

Jansson, Scullman, et al., 1969
Jansson, K.; Scullman, R.; Yttermo, B., The spectrum of IrC in the region 4800 - 5300 Å, Chem. Phys. Lett., 1969, 4, 188. [all data]

McIntyre, Auwera-Mahieu, et al., 1968
McIntyre, N.S.; Auwera-Mahieu, A.V.; Drowart, J., Mass spectrometric determination of the dissociation energies of gaseous RuC, IrC and PtB, J. Chem. Soc. Faraday Trans., 1968, 64, 3006. [all data]

Gingerich, 1973
Gingerich, K.A., Mass spectrometric evidence for the very high stability of gaseous ThIr and ThPt and method of calculating dissociation energies of diatomic intermetallic compounds with multiple bonds, Chem. Phys. Lett., 1973, 23, 270. [all data]


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