Home Symbol which looks like a small house Up Solid circle with an upward pointer in it

Carbon monophosphide


Gas phase thermochemistry data

Go To: Top, Gas phase ion energetics data, Constants of diatomic molecules, References, Notes

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
Deltafgas449.89kJ/molReviewChase, 1998Data last reviewed in June, 1962
Quantity Value Units Method Reference Comment
gas,1 bar216.26J/mol*KReviewChase, 1998Data last reviewed in June, 1962

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.

View plot Requires a JavaScript / HTML 5 canvas capable browser.

View table.

Temperature (K) 298. - 600.600. - 6000.
A 20.4070436.00817
B 32.476541.177253
C -20.33098-0.222782
D 2.1353680.017179
E 0.139662-1.192487
F 443.0103435.6757
G 232.9388254.3575
H 449.8930449.8930
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in June, 1962 Data last reviewed in June, 1962

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, Constants of diatomic molecules, References, Notes

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

View reactions leading to CP+ (ion structure unspecified)

Ionization energy determinations

IE (eV) Method Reference Comment
10.5 ± 0.5EISmoes, Myers, et al., 1971LLK

Constants of diatomic molecules

Go To: Top, Gas phase thermochemistry data, 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 October, 1976

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 12C31P
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
B 2Sigma+ 29100.4 836.32 H 5.917  0.6829 1 2 0.00628  0.00000182  1.6894 B rarrow A R 21934.3 H
missing citation
           B rarrow A R 22092.6 H
missing citation
           B rarrow X 3 R 28898.9 H
missing citation
A 2Pii 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  
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
X 2Sigma+ 0 1239.67 H 6.86  0.7986 5 2 0.00597  0.00000133  1.5622  

Notes

1Spin-splitting constant gamma = (-)0.006.
2RKR potential curves Thakur and Singh, 1967.
3Morse-potential Franck-Condon factors Wentink and Spindler, 1970.
4Recalculated from head-head separations in the B-A system. Similar calculations by Barwald, Herzberg, et al., 1934 gave Be = 0.698, alphae = 0.0077. The rotational analysis of the B-A, 0-0 band Chaudhry and Upadhya, 1969 yields B0 = 0.7101.
5Spin-splitting constant gamma = (+) 0.017.
6Thermochemical value (mass-spectrom.) Gingerich, 1971, Smoes, Myers, et al., 1971, Kordis and Gingerich, 1973.

References

Go To: Top, Gas phase thermochemistry data, 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.

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [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]

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., 2«SIGMA»+-2«PI» 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]

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, Gas phase thermochemistry data, Gas phase ion energetics data, Constants of diatomic molecules, References