Phosphorus monoxide

• Formula: OP
• Molecular weight: 46.9732
• IUPAC Standard InChI:
  

  InChI=1S/OP/c1-2 Download the identifier in a file.

• IUPAC Standard InChIKey: LFGREXWGYUGZLY-UHFFFAOYSA-N
• CAS Registry Number: 14452-66-5
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  The 3d structure may be viewed using Java or Javascript.
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• Information on this page:
  • Gas phase thermochemistry data
  • Reaction thermochemistry data
  • Gas phase ion energetics data
  • Constants of diatomic molecules
  • References
  • Notes
• Data at other public NIST sites:
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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.

Quantity	Value	Units	Method	Reference	Comment
fH°gas	-23.55	kJ/mol	Review	Chase, 1998	Data last reviewed in June, 1971
Quantity	Value	Units	Method	Reference	Comment
S°gas,1 bar	222.78	J/mol*K	Review	Chase, 1998	Data last reviewed in June, 1971

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 (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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View table.

Reaction 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.

Data compiled by: John E. Bartmess

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

(CAS Reg. No. 12359-19-2  4294967295) +  = CAS Reg. No. 12359-19-2

By formula: (CAS Reg. No. 12359-19-2  4294967295OP) + OP = CAS Reg. No. 12359-19-2

Quantity	Value	Units	Method	Reference	Comment
rH°	692. ± 10.	kJ/mol	N/A	N/A	gas phase

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, Reaction 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 evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias

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
B - John E. Bartmess

View reactions leading to OP⁺ (ion structure unspecified)

Electron affinity determinations

Ionization energy determinations

Constants of diatomic molecules

Go To: Top, Gas phase thermochemistry data, Reaction 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 September, 1977

Diatomic constants for ³¹P¹⁶O

State	Te	e	exe	eye	Be	e	e	De	e	re	Trans.	00
Theoretical calculations of the ground state Boyd and Lipscomb, 1967 Mulliken and Liu, 1971, of low-lying valence states Roche and Lefebvre-Brion, 1973 Tseng and Grein, 1973, and of Rydberg states Ackermann, Lefebvre-Brion, et al., 1972.
H 2+	(56017) 1	(1391)	(7)		(0.780)	(0.0054)				(1.431)	H B RV	(25401) 2
	↳missing citation; Ngo, da Paz, et al., 1974
I 2+	55458.1	1390.2 Z	6.0		0.7798 3	0.0048		0.8E-6		1.4316	I A	15051.1 Z
	↳missing citation
											I B V	24842.0
	↳missing citation; missing citation
											I X V	55536.7
	↳missing citation
State	Te	e	exe	eye	Be	e	e	De	e	re	Trans.	00
E 2	53091	[1456.28] Z	(15.8)		0.7583 4	0.0074		0.8E-6		1.4518	E X V	53215.6 Z
	↳missing citation; missing citation; missing citation
G 2+	(52412) 1	(1382)	(13)		(0.780)	(0.0054)				(1.431)	G A	(11999) 2
	↳missing citation
											G B RV	(21790) 2
	↳missing citation; missing citation
											G X V	(52484) 2
	↳missing citation
State	Te	e	exe	eye	Be	e	e	De	e	re	Trans.	00
F 2+	(49880) 1	(850)	(7.5)		(0.6082)	(0.0045)				(1.621)	F A R	(9202) 2
	↳missing citation
											F B R	(18993) 2
	↳missing citation; Guha, Jois, et al., 1972; missing citation
											F X R	(49688) 2
	↳missing citation
D 2r	48520 5	[1358.1]	(7)		0.755 6	0.007				1.455	D B R	17894.6 2
	↳Couet, Coquart, et al., 1968; missing citation; missing citation
											D X R	48589.3 2
	↳Dressler, 1955; Couet, Coquart, et al., 1968; missing citation; missing citation
State	Te	e	exe	eye	Be	e	e	De	e	re	Trans.	00
C 2-	44831.75	779.22 7 Z	5.14		0.5903 7	0.0056		(1.4E-6)		1.645	C X R	44605.05 Z
	↳Dressler, 1955; Verma and Broida, 1970; missing citation; missing citation
C' 2	43742.74	825.74 Z	6.93 8		0.6405 9	0.0052		(1.5E-6)		1.580	C' X R	43538.85 Z
	↳Santaram and Rao, 1962; Narasimham, Dixit, et al., 1966; missing citation; Dixit and Narasimham, 1969; Verma and Broida, 1970; missing citation; missing citation
A 2+	40406.89	1390.94 10 Z	6.91 10		0.7801 10 11 12	0.00542 10		1.0E-6		1.4313	A B VR	9790.86 Z
	↳missing citation; missing citation; missing citation
											A X 13 V	40485.60 Z
	↳missing citation; Norrish and Oldershaw, 1961; Coquart, Couet, et al., 1967; missing citation; missing citation
State	Te	e	exe	eye	Be	e	e	De	e	re	Trans.	00
B' 2	33120.7 14	759.2 15	3.85 15		0.5420 15	0.0049 15		[1.0E-6]		1.7172	B' B 16 R
	↳missing citation
											B' X R	32884.3 15
	↳Verma, 1970; Verma and Broida, 1970; Verma and Singhal, 1975; missing citation
b 4-	(34837) 17	(889.0) 17	(6.62) 17		(0.644) 17	(0.006) 17				(1.575)
B 2+	30730.88	1164.51 Z	13.46	-0.05	0.7463 18 12	0.0088	-0.00006	1.25E-6		1.4634	B X VR	30694.74 Z
	↳missing citation; Norrish and Oldershaw, 1961; missing citation; Couet, Tuan Anh, et al., 1968; missing citation; Rai, Rai, et al., 1972; missing citation; missing citation
State	Te	e	exe	eye	Be	e	e	De	e	re	Trans.	00
X 2r	0 19	1233.34 Z	6.56		0.7337 20 12	0.0055		1.3E-6		1.4759

Notes

1	The G, H, I 2+ Rydberg states (as well as higher levels of A 2+) interact with the F 2+ non-Rydberg state. Most of the observed bands are strongly perturbed. The constants in the Table are deperturbed values taken from Ngo, da Paz, et al., 1974 who give results for P16O and P18O; similar constants have earlier been reported by Verma, Dixit, et al., 1971. In addition to the strong homogeneous interactions a large number of local perturbations have been described for both isotopes Verma, Dixit, et al., 1971, Guha, Jois, et al., 1972, Ngo, da Paz, et al., 1974.
2	The v00 values have been calculated from deperturbed constants and should not be expected to coincide precisely with observed transitions.
3	Rotational perturbations in v=0,1,2 Guha, Jois, et al., 1972.
4	Perturbations by C' 2.
5	A0 = +26.2, A1 = +22.8. All constants given for D 2 (v=0,1) are deperturbed values from Ghosh, Nagaraj, et al., 1976; see also Coquart, da Paz, et al., 1974. This state interacts strongly with high vibrational levels of B' 2. For v=2 and 3 only fragments have been observed in absorption Ghosh, Nagaraj, et al., 1976 making the deperturbation results for these levels even less reliable.
6	The highest level observed in emission from the interacting pair D(v=0) ~ B'(v=24?) is the N=34 level [predominantly D(v=0)] lying at 49647 cm-1 above X 21/2(v=0,J=1/2); see Couet, Coquart, et al., 1968. Higher levels are predissociated and give rise to diffuse lines in the absorption spectrum. A summary of predissociation phenomena observed in B' and D levels is given by Ghosh, Nagaraj, et al., 1976 who suggest that the predissociation is caused by the repulsive part of the 4 state arising from 4S + 3P.
7	missing note
8	Prudhomme and Coquart, 1974 suggest that an additional term, weye ~ 0.040, is needed in order to account for higher vibrational levels (v=l4...18) found in perturbations of E 2(v=0,1,2).
9	Small spin doubling, ~ 0.0085 Prudhomme, Larzilliere, et al., 1973; local perturbations.
10	Average of values obtained by Rao, 1958, Verma and Jois, 1973, Coquart, da Paz, et al., 1975. Above v=3 the influence of the F 2+ state becomes noticeable.
11	Spin splitting constant ~ +0.0013 Verma and Jois, 1973. Many rotational perturbations Coquart and Prudhomme, 1972, Verma and Jois, 1973, Coquart, da Paz, et al., 1975.
12	Potentia1 curves Singh and Rai, 1965.
13	Franck-Condon factors Sankaranarayanan, 1966.
14	Av increases from -13.3 for v=0 to about +30 for v=23...26 Verma, 1970, Coquart, da Paz, et al., 1974, Ghosh, Nagaraj, et al., 1976; theoretical explanation Roche and Lefebvre-Brion, 1973.
15	These are the constants of Verma and Jois, 1973 based on the rotational analysis of v=0 and 1 Verma, 1970 and on the identification of several intermediate levels (v=6 and 12...22) in perturbations with B 2+ Verma and Singhal, 1975 and A 2+ Verma and Jois, 1973. Higher vibrational levels (v=23...26, formerly D' 2) are observed in the region of strong interaction with the Rydberg D 2 state Coquart, da Paz, et al., 1974, Ghosh, Nagaraj, et al., 1976. The vibrational numbering chosen by Verma, 1970 and used in this Table is arbitrary and may have to be increased by 2 as suggested by Cornet, Dubois, et al., 1977 whose re-analysis of the B'-X system includes a large number of absorption bands previously attributed to OPCl Verma and Nagaraj, 1975 as well as a number of emission bands left unassigned by Verma and Broida, 1970 and Verma and Singhal, 1975.
16	The B'B bands originate from highly excited levels with v' ~ 24 which are strongly mixed with low vibrational levels of D 2.
17	Constants derived from perturbations in B 2+ and A 2+ Verma and Singhal, 1975, corrected for the new vibrational numbering of Coquart, da Paz, et al., 1975.
18	Spin splitting constant = -0.0068. Extensive rotational perturbations in v=6,7 by levels of B' 2 and b 4-; see Verma and Singhal, 1975. The v=7 level appears to be preferentially populated in the P4 + O glow Verma and Broida, 1970.
19	Av = 224.03 + 0.18v - 0.013v2 (v11) Verma and Singhal, 1975; see also Zaidi and Verma, 1975. Similar results in Prudhomme, Larzilliere, et al., 1973.
20	-type doubling vef(21/2) = -0.0070(J+1/2).
21	Thermochemical value (mass-spectrometry) Drowart, Myers, et al., 1972. The predissociation in the perturbed D(v=0) level (see 6) gives the upper limit D00 6.161 eV.
22	Theoretical value Ackermann, Lefebvre-Brion, et al., 1972. Drowart, Myers, et al., 1972 report an electron impact appearance potential of 8.5 eV.
23	Vibrational numbering confirmed by P16O - P18O isotope shifts Prudhomme, Larzilliere, et al., 1973.
24	Papers by Singh, 1959, Mohanty, Upadhya, et al., 1967, Mohanty, Rai, et al., 1969 contain erroneous branch identifications; see Verma and Dixit, 1968, Rai, Rai, et al., 1972.

References

Go To: Top, Gas phase thermochemistry data, Reaction 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]

Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G., Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update, J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018 . [all data]

Zittel and Lineberger, 1976
Zittel, P.F.; Lineberger, W.C., Laser photoelectron spectrometry of PO-, PH-, and PH₂-, J. Chem. Phys., 1976, 65, 1236. [all data]

Wu and Tiernan, 1982
Wu, R.L.C.; Tiernan, T.O., Collisional Studies of High Temperature Molecular Negative Ion-Neutral Reactions, Bull. Am. Phys. Soc., 1982, 27, 109. [all data]

Dyke, Morris, et al., 1982
Dyke, J.M.; Morris, A.; Ridha, A., Study of the ground state of PO⁺ using photoelectron spectroscopy, J. Chem. Soc. Faraday Trans. 2, 1982, 78, 2077. [all data]

Balducci, Gigli, et al., 1981
Balducci, G.; Gigli, G.; Guido, M., Dissociation energies of the molecules CrPO₂(g) and CoO(g) by high-temperature mass spectrometry, J. Chem. Soc. Faraday Trans. 2, 1981, 77, 1107. [all data]

Ghosh and Verma, 1978
Ghosh, S.N.; Verma, R.D., Rydberg states of the PO molecule, J. Mol. Spectrosc., 1978, 72, 200. [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]

Gingerich and Miller, 1975
Gingerich, K.A.; Miller, F., Thermodynamic study of gaseous sodium-phosphorus-oxygen ternary molecules by high temperature mass spectrometry, J. Chem. Phys., 1975, 63, 1211. [all data]

Smoes and Drowart, 1973
Smoes, S.; Drowart, J., Atomization energies of phosphorus oxides, Faraday Symp. Chem. Soc., 1973, 139. [all data]

Drowart, Myers, et al., 1972
Drowart, J.; Myers, C.E.; Szwarc, R.; Vander Auwera-Mahieu, A.; Uy, O.M., Determination by the mass spectrometric Knudsen cell method of the atomization energies of the molecules PO and PO₂, J. Chem. Soc. Faraday Trans. 2, 1972, 68, 1749. [all data]

Ackermann, Lefebvre-Brion, et al., 1972
Ackermann, F.; Lefebvre-Brion, H.; Roche, A.L., Calculated Rydberg states of the PO molecule, Can. J. Phys., 1972, 50, 692. [all data]

Verma, Dixit, et al., 1971
Verma, R.D.; Dixit, M.N.; Jois, S.S.; Nagaraj, S.; Singhal, S.R., Emission spectrum of the PO molecule. Part II. ²«SIGMA»-₂«SIGMA» transitions, Can. J. Phys., 1971, 49, 3180. [all data]

Boyd and Lipscomb, 1967
Boyd, D.B.; Lipscomb, W.N., Molecular SCF calculations on PH₃, PO, PO^-, and P₂, J. Chem. Phys., 1967, 46, 910. [all data]

Mulliken and Liu, 1971
Mulliken, R.S.; Liu, B., Self-consistent-field wave functions of P₂ and PO, and the role of d functions in chemical bonding and of s-p hybridization in N₂ and P₂, J. Am. Chem. Soc., 1971, 93, 6738. [all data]

Roche and Lefebvre-Brion, 1973
Roche, A.L.; Lefebvre-Brion, H., Valence-shell states of PO: an example of the variation of the spin-orbit coupling constants with internuclear distance, J. Chem. Phys., 1973, 59, 1914. [all data]

Tseng and Grein, 1973
Tseng, T.J.; Grein, F., Low-lying valence states of the PO molecule according to configuration-interaction calculations, J. Chem. Phys., 1973, 59, 6563. [all data]

Ngo, da Paz, et al., 1974
Ngo, T.A.; da Paz, M.; Coquart, B.; Couet, C., Spectre d'emission de la molecule PO: etude des etats ²«SIGMA»⁺ situes dans le domaine energetique 50 000-58 000 cm^-1 des molecules P^16O et P^18O, Can. J. Phys., 1974, 52, 154. [all data]

Guha, Jois, et al., 1972
Guha, S.; Jois, S.S.; Verma, R.D., Emission spectrum of the PO molecule. Part III. Spectrum in the red region, Can. J. Phys., 1972, 50, 1579. [all data]

Couet, Coquart, et al., 1968
Couet, C.; Coquart, B.; Tuan Anh, N.; Guenebaut, H., Contribution a l'etude des systemes electroniques du radical PO. IV. Etude des systemes visibles et ultraviolets mettant en jeu les etats D²«PI»_r(a) et D'²«PI»(a), J. Chim. Phys. Phys.-Chim. Biol., 1968, 65, 1241. [all data]

Dressler, 1955
Dressler, K., Ultraviolett- und Schumannspektren der neutralen und ionisierten Molekule PO, PS, NS, P₂, Helv. Phys. Acta, 1955, 28, 563. [all data]

Verma and Broida, 1970
Verma, R.D.; Broida, H.P., Spectral study of the phosphorus glow, Can. J. Phys., 1970, 48, 2991. [all data]

Santaram and Rao, 1962
Santaram, C.V.V.S.N.K.; Rao, P.T., The band spectrum of PO: two new doublet systems in the ultraviolet, Z. Phys., 1962, 168, 553. [all data]

Narasimham, Dixit, et al., 1966
Narasimham, N.A.; Dixit, M.N.; Sethuraman, V., ²«SIGMA» --> X²«PI» band system in PO molecule, Proc. Indian Acad. Sci. Sect. A, 1966, 62, 314. [all data]

Dixit and Narasimham, 1969
Dixit, M.N.; Narasimham, N.A., Isotope shift studies of the ultra-violet and visible bands of P¹⁶O and P¹⁸O, Proc. Indian Acad. Sci. Sect. A, 1969, 68, 1. [all data]

Norrish and Oldershaw, 1961
Norrish, R.G.W.; Oldershaw, G.A., The oxidation of phosphine studied by flash photolysis and kinetic spectroscopy, Proc. R. Soc. London A, 1961, 262, 10. [all data]

Coquart, Couet, et al., 1967
Coquart, B.; Couet, C.; Tuan Anh, N.; Guenebaut, H., Contribution a l'etude des systemes electroniques du radical PO 2^e partie: considerations nouvelles sur le systeme «gamma» (transition A²«SIGMA»⁺ - X²«PI»_a), J. Chim. Phys. Phys.-Chim. Biol., 1967, 64, 1197. [all data]

Verma, 1970
Verma, R.D., Emission spectrum of the PO molecule. I. A new B'²«PI»_i-X²«PI»_r transition, Can. J. Phys., 1970, 48, 2391. [all data]

Verma and Singhal, 1975
Verma, R.D.; Singhal, S.R., New results on the B²«SIGMA»⁺, b⁴«SIGMA»^-, and X²«PI» states of PO, Can. J. Phys., 1975, 53, 411. [all data]

Couet, Tuan Anh, et al., 1968
Couet, C.; Tuan Anh, N.; Coquart, B.; Guenebaut, H., Contribution a l'etude des systemes electroniques du radical PO. 3^e partie: le systeme «beta» (transition B²«SIGMA»⁺ - X²«PI»_a), J. Chim. Phys. Phys.-Chim. Biol., 1968, 65, 217. [all data]

Rai, Rai, et al., 1972
Rai, S.B.; Rai, D.K.; Upadhya, K.N., Analysis of some bands of the «beta» system of PO, J. Phys. B:, 1972, 5, 1038. [all data]

Ghosh, Nagaraj, et al., 1976
Ghosh, S.; Nagaraj, S.; Verma, R.D., New results on the D²«PI» and B'²«PI» states of the PO molecule, Can. J. Phys., 1976, 54, 695. [all data]

Coquart, da Paz, et al., 1974
Coquart, B.; da Paz, M.; Prudhomme, J.C., Spectre d'emission de la molecule PO: transitions D²«PI»-B²«SIGMA»⁺ et D'²«PI»-B²«SIGMA»⁺ des molecules P¹⁶O et P¹⁸O. Reconsideration de l'etat de valence D'²«PI», Can. J. Phys., 1974, 52, 177. [all data]

Prudhomme and Coquart, 1974
Prudhomme, J.C.; Coquart, B., Spectre d'emission de la molecule P^18O: donnees nouvelles sur l'etat E²«DELTA», Can. J. Phys., 1974, 52, 2150. [all data]

Prudhomme, Larzilliere, et al., 1973
Prudhomme, J.C.; Larzilliere, M.; Couet, C., Spectre d'emission de la molecule PO: transitions C'²«DELTA»-X²«PI»_r et C²«SIGMA»^--X²«PI»_r de P¹⁶O et P¹⁸O, Can. J. Phys., 1973, 51, 2464. [all data]

Rao, 1958
Rao, K.S., Rotational analysis of the «gamma» system of the PO molecule, Can. J. Phys., 1958, 36, 1526. [all data]

Verma and Jois, 1973
Verma, R.D.; Jois, S.S., Emission spectrum of the PO molecule. Part IV. Spectrum in the region 7000-12 000 Å, Can. J. Phys., 1973, 51, 322. [all data]

Coquart, da Paz, et al., 1975
Coquart, B.; da Paz, M.; Prudhomme, J.C., Transition A²«SIGMA»⁺ - X²«PI» des molecules P¹⁶O et P¹⁸O. Perturbations de l'etat A²«SIGMA»⁺, Can. J. Phys., 1975, 53, 377. [all data]

Coquart and Prudhomme, 1972
Coquart, B.; Prudhomme, J.-C., Reconsiderations sur le systeme «gamma» de PO; localisation de perturbations rotationnelles dans les premiers niveaux vibrationnels de l'etat A²«SIGMA»⁺, C.R. Acad. Sci. Paris, Ser. B, 1972, 275, 383. [all data]

Singh and Rai, 1965
Singh, R.B.; Rai, D.K., Potential curves and bond strength of PO, J. Phys. Chem., 1965, 69, 3461. [all data]

Sankaranarayanan, 1966
Sankaranarayanan, S., «gamma»-Centroids and Franck-Condon factors for the bands of A²«SIGMA»-X²«PI» system of PO molecule, Indian J. Phys., 1966, 40, 678. [all data]

Cornet, Dubois, et al., 1977
Cornet, R.; Dubois, I.; Houbrechts, Y., About the absorption spectrum of OPCl, J. Phys. B:, 1977, 10, 415. [all data]

Verma and Nagaraj, 1975
Verma, R.D.; Nagaraj, S., A new absorption spectrum attributable to the OPCl radical, J. Mol. Spectrosc., 1975, 58, 301. [all data]

Zaidi and Verma, 1975
Zaidi, H.R.; Verma, R.D., Quantum number dependence of the spin-orbit coupling in the X²«PI» state of PO, Can. J. Phys., 1975, 53, 420. [all data]

Singh, 1959
Singh, N.L., Rotational analysis of the «beta» bands of phosphorus monoxide, Can. J. Phys., 1959, 37, 136. [all data]

Mohanty, Upadhya, et al., 1967
Mohanty, B.S.; Upadhya, K.N.; Singh, R.B.; Singh, N.L., On the «beta»-band system of the PO molecule, J. Mol. Spectrosc., 1967, 24, 19. [all data]

Mohanty, Rai, et al., 1969
Mohanty, B.S.; Rai, D.K.; Upadhya, K.N., Structure and analysis of some bands of the «beta»-system of PO molecule, Proc. Indian Acad. Sci. Sect. A, 1969, 68, 165. [all data]

Verma and Dixit, 1968
Verma, R.D.; Dixit, M.N., The D and D' states of the PO molecule, Can. J. Phys., 1968, 46, 2079. [all data]

Notes

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

• Symbols used in this document:
  

  EA	Electron affinity
  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  fH°gas	Enthalpy of formation of gas at standard conditions
  rH°	Enthalpy of reaction at standard conditions

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