Carbon monophosphide
- Formula: CP
- Molecular weight: 42.9845
- IUPAC Standard InChI: InChI=1S/CP/c1-2
- IUPAC Standard InChIKey: GDPLAAHPHNAIGW-UHFFFAOYSA-N
- CAS Registry Number: 12326-85-1
- Chemical structure:
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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 October, 1976
| Symbol | Meaning |
|---|---|
| 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) |
| State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| B 2Σ+ | 29100.4 | 836.32 H | 5.917 | 0.6829 1 2 | 0.00628 | 0.00000182 | 1.6894 | B → A R | 21934.3 H | |||
| ↳missing citation | ||||||||||||
| B → A R | 22092.6 H | |||||||||||
| ↳missing citation | ||||||||||||
| B → X 3 R | 28898.9 H | |||||||||||
| ↳missing citation | ||||||||||||
| A 2Πi | 7053.2 | 1061.99 HQ | 6.035 | 0.7135 4 | 0.0058 4 | 0.0000013 | 1.653 | |||||
| 6894.9 | 1061.99 HQ | 6.035 | 0.7135 4 | 0.0058 4 | 0.0000013 | 1.653 | ||||||
| State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
| X 2Σ+ | 0 | 1239.67 H | 6.86 | 0.7986 5 2 | 0.00597 | 0.00000133 | 1.5622 | |||||
Notes
| 1 | Spin-splitting constant γ = (-)0.006. |
| 2 | RKR potential curves Thakur and Singh, 1967. |
| 3 | Morse-potential Franck-Condon factors Wentink and Spindler, 1970. |
| 4 | Recalculated from head-head separations in the B-A system. Similar calculations by Barwald, Herzberg, et al., 1934 gave Be = 0.698, αe = 0.0077. The rotational analysis of the B-A, 0-0 band Chaudhry and Upadhya, 1969 yields B0 = 0.7101. |
| 5 | Spin-splitting constant γ = (+) 0.017. |
| 6 | Thermochemical value (mass-spectrom.) Gingerich, 1971, Smoes, Myers, et al., 1971, Kordis and Gingerich, 1973. |
References
Go To: Top, 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.
Thakur and Singh, 1967
Thakur, S.N.; Singh, R.B.,
Potential curves and bond strength of CP, BeO and MgO,
J. Sci. Res. Banaras Hindu Univ., 1967, 18, 1, 253-264. [all data]
Wentink and Spindler, 1970
Wentink, T., Jr.; Spindler, R.J., Jr.,
Franck-Condon Factors and r-centroids for No+, CP, SiF, BF, BCl, and BBr,
J. Quant. Spectrosc. Radiat. Transfer, 1970, 10, 609. [all data]
Barwald, Herzberg, et al., 1934
Barwald, H.; Herzberg, G.; Herzberg, L.,
Bandenspektrum und struktur des CP-molekuls,
Ann. Phys. (Neue Folge), 1934, 20, 569. [all data]
Chaudhry and Upadhya, 1969
Chaudhry, A.K.; Upadhya, K.N.,
2Σ+-2Π band system in CP molecule,
Indian J. Phys., 1969, 43, 83. [all data]
Gingerich, 1971
Gingerich, K.A.,
Gaseous phosphorus compounds. Part V. The dissociation energy and heat of formation of carbon monophosphide,
Thermochim. Acta, 1971, 2, 233. [all data]
Smoes, Myers, et al., 1971
Smoes, S.; Myers, C.E.; Drowart, J.,
Determination of the atomization energies of CP, C2P, CP2 and C2P2 by high temperature Knudsen cell mass spectrometry,
Chem. Phys. Lett., 1971, 8, 10. [all data]
Kordis and Gingerich, 1973
Kordis, J.; Gingerich, K.A.,
Gaseous phosphorus compounds. IX. Mass spectrometric studies of equilibria in the carbon-phosporus system,
J. Chem. Phys., 1973, 58, 5058. [all data]
Notes
Go To: Top, Constants of diatomic molecules, References
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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