Phosphorus monoxide

Formula: OP
Molecular weight: 46.9732
IUPAC Standard InChI: InChI=1S/OP/c1-2
IUPAC Standard InChIKey: LFGREXWGYUGZLY-UHFFFAOYSA-N
CAS Registry Number: 14452-66-5
Chemical structure:
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Information on this page:
Other data available:
- Gas phase thermochemistry data
- Reaction thermochemistry data
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Gas phase ion energetics data

Go To: Top, Constants of diatomic molecules, References, Notes

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)

Quantity	Value	Units	Method	Reference	Comment
Proton affinity (review)	163.	kcal/mol	N/A	Hunter and Lias, 1998	HL
Quantity	Value	Units	Method	Reference	Comment
Gas basicity	155.2	kcal/mol	N/A	Hunter and Lias, 1998	HL

Electron affinity determinations

EA (eV)	Method	Reference	Comment
1.092 ± 0.010	LPES	Zittel and Lineberger, 1976	B
1.00 ± 0.10	Endo	Wu and Tiernan, 1982	B

Ionization energy determinations

IE (eV)	Method	Reference	Comment
8.39 ± 0.01	PE	Dyke, Morris, et al., 1982	LBLHLM
8.9 ± 0.5	EI	Balducci, Gigli, et al., 1981	LLK
8.373	S	Ghosh and Verma, 1978	LLK
9.1 ± 0.5	EI	Smoes, Drowart, et al., 1976	LLK
10.7	EI	Gingerich and Miller, 1975	LLK
9.5 ± 0.5	EI	Smoes and Drowart, 1973	LLK
9. ± 1.	EI	Drowart, Myers, et al., 1972	LLK
8.231	S	Ackermann, Lefebvre-Brion, et al., 1972	LLK
8.38	S	Verma, Dixit, et al., 1971	LLK

Constants of diatomic molecules

Go To: Top, Gas phase ion energetics data, References, Notes

Data compiled by: Klaus P. Huber and Gerhard H. Herzberg

Data collected through September, 1977

Symbols used in the table of constants
Symbol	Meaning
State	electronic state and / or symmetry symbol
T_e	minimum electronic energy (cm^-1)
ω_e	vibrational constant – first term (cm^-1)
ω_ex_e	vibrational constant – second term (cm^-1)
ω_ey_e	vibrational constant – third term (cm^-1)
B_e	rotational constant in equilibrium position (cm^-1)
α_e	rotational constant – first term (cm^-1)
γ_e	rotation-vibration interaction constant (cm^-1)
D_e	centrifugal distortion constant (cm^-1)
β_e	rotational constant – first term, centrifugal force (cm^-1)
r_e	internuclear distance (Å)
Trans.	observed transition(s) corresponding to electronic state
ν₀₀	position of 0-0 band (units noted in table)

Diatomic constants for ³¹P¹⁶O
State	T_e	ω_e	ω_ex_e	ω_ey_e	B_e	α_e	γ_e	D_e	β_e	r_e	Trans.	ν₀₀
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 ²Σ⁺	(56017) 1	(1391)	(7)		(0.780)	(0.005₄)				(1.431)	H → B R_V	(25401) 2
H ²Σ⁺	↳missing citation; Ngo, da Paz, et al., 1974
I ²Σ⁺	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	T_e	ω_e	ω_ex_e	ω_ey_e	B_e	α_e	γ_e	D_e	β_e	r_e	Trans.	ν₀₀
E ²Δ	53091	[1456.28] Z	(15.8)		0.758₃ 4	0.0074		0.8E-6		1.451₈	E → X V	53215.6 Z
E ²Δ	↳missing citation; missing citation; missing citation
G ²Σ⁺	(52412) 1	(1382)	(13)		(0.780)	(0.005₄)				(1.431)	G → A	(11999) 2
	↳missing citation
											G → B R_V	(21790) 2
	↳missing citation; missing citation
											G → X V	(52484) 2
	↳missing citation
State	T_e	ω_e	ω_ex_e	ω_ey_e	B_e	α_e	γ_e	D_e	β_e	r_e	Trans.	ν₀₀
F ²Σ⁺	(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 ²Π_r	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	T_e	ω_e	ω_ex_e	ω_ey_e	B_e	α_e	γ_e	D_e	β_e	r_e	Trans.	ν₀₀
C ²Σ^-	44831.7₅	779.2₂ 7 Z	5.14		0.590₃ 7	0.0056		(1.4E-6)		1.645	C → X R	44605.0₅ Z
C ²Σ^-	↳Dressler, 1955; Verma and Broida, 1970; missing citation; missing citation
C' ²Δ	43742.7₄	825.7₄ Z	6.93 8		0.640₅ 9	0.0052		(1.5E-6)		1.580	C' → X R	43538.8₅ Z
C' ²Δ	↳Santaram and Rao, 1962; Narasimham, Dixit, et al., 1966; missing citation; Dixit and Narasimham, 1969; Verma and Broida, 1970; missing citation; missing citation
A ²Σ⁺	40406.8₉	1390.9₄ 10 Z	6.91 10		0.7801 10 11 12	0.0054₂ 10		1.0E-6		1.4313	A → B V_R	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	T_e	ω_e	ω_ex_e	ω_ey_e	B_e	α_e	γ_e	D_e	β_e	r_e	Trans.	ν₀₀
B' ²Π	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 ⁴Σ^-	(34837) 17	(889.₀) 17	(6.6₂) 17		(0.644) 17	(0.006) 17				(1.57₅)
B ²Σ⁺	30730.88	1164.51 Z	13.46	-0.05	0.7463 18 12	0.0088	-0.00006	1.25E-6		1.4634	B ↔ X V_R	30694.74 Z
B ²Σ⁺	↳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	T_e	ω_e	ω_ex_e	ω_ey_e	B_e	α_e	γ_e	D_e	β_e	r_e	Trans.	ν₀₀
X ²Π_r	0 19	1233.34 Z	6.56		0.7337 20 12	0.0055		1.3E-6		1.4759

Notes

The G, H, I ²Σ⁺ Rydberg states (as well as higher levels of A ²Σ⁺) interact with the F ²Σ⁺ 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.

The v₀₀ values have been calculated from deperturbed constants and should not be expected to coincide precisely with observed transitions.

Rotational perturbations in v=0,1,2 Guha, Jois, et al., 1972.

Perturbations by C' ²Δ.

A₀ = +26.2, A₁ = +22.8. All constants given for D ²Π (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' ²Π. 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.

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 ²Π_1/2(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 ⁴Π state arising from ⁴S + ³P.

missing note

Prudhomme and Coquart, 1974 suggest that an additional term, w_ey_e ~ 0.040, is needed in order to account for higher vibrational levels (v=l4...18) found in perturbations of E ²Δ(v=0,1,2).

Small spin doubling, γ ~ 0.0085 Prudhomme, Larzilliere, et al., 1973; local perturbations.

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 ²Σ⁺ state becomes noticeable.

Spin splitting constant γ ~ +0.0013 Verma and Jois, 1973. Many rotational perturbations Coquart and Prudhomme, 1972, Verma and Jois, 1973, Coquart, da Paz, et al., 1975.

Potentia1 curves Singh and Rai, 1965.

Franck-Condon factors Sankaranarayanan, 1966.

A_v 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.

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 ²Σ⁺ Verma and Singhal, 1975 and A ²Σ⁺ Verma and Jois, 1973. Higher vibrational levels (v=23...26, formerly D' ²Π) are observed in the region of strong interaction with the Rydberg D ²Π 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.

The B'→B bands originate from highly excited levels with v' ~ 24 which are strongly mixed with low vibrational levels of D ²Π.

Constants derived from perturbations in B ²Σ⁺ and A ²Σ⁺ Verma and Singhal, 1975, corrected for the new vibrational numbering of Coquart, da Paz, et al., 1975.

Spin splitting constant γ = -0.0068. Extensive rotational perturbations in v=6,7 by levels of B' ²Π and b ⁴Σ^-; see Verma and Singhal, 1975. The v=7 level appears to be preferentially populated in the P₄ + O glow Verma and Broida, 1970.

A_v = 224.03 + 0.18v - 0.013v² (v≤11) Verma and Singhal, 1975; see also Zaidi and Verma, 1975. Similar results in Prudhomme, Larzilliere, et al., 1973.

Λ-type doubling Δv_ef(²Π_1/2) = -0.0070(J+1/2).

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.

Theoretical value Ackermann, Lefebvre-Brion, et al., 1972. Drowart, Myers, et al., 1972 report an electron impact appearance potential of 8.₅ eV.

Vibrational numbering confirmed by P¹⁶O - P¹⁸O isotope shifts Prudhomme, Larzilliere, et al., 1973.

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 ion energetics data, Constants of diatomic molecules, Notes

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. ²Σ-₂Σ 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 ²Σ⁺ 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 D²Π_r(a) et D'²Π(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., ²Σ → X²Π 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 γ (transition A²Σ⁺ - X²Π_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'²Π_i-X²Π_r transition, Can. J. Phys., 1970, 48, 2391. [all data]

Verma and Singhal, 1975
Verma, R.D.; Singhal, S.R., New results on the B²Σ⁺, b⁴Σ^-, and X²Π 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 β (transition B²Σ⁺ - X²Π_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 β 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 D²Π and B'²Π 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 D²Π-B²Σ⁺ et D'²Π-B²Σ⁺ des molecules P¹⁶O et P¹⁸O. Reconsideration de l'etat de valence D'²Π, 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 E²Δ, 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'²Δ-X²Π_r et C²Σ^--X²Π_r de P¹⁶O et P¹⁸O, Can. J. Phys., 1973, 51, 2464. [all data]

Rao, 1958
Rao, K.S., Rotational analysis of the γ 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 A²Σ⁺ - X²Π des molecules P¹⁶O et P¹⁸O. Perturbations de l'etat A²Σ⁺, Can. J. Phys., 1975, 53, 377. [all data]

Coquart and Prudhomme, 1972
Coquart, B.; Prudhomme, J.-C., Reconsiderations sur le systeme γ de PO; localisation de perturbations rotationnelles dans les premiers niveaux vibrationnels de l'etat A²Σ⁺, 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., γ-Centroids and Franck-Condon factors for the bands of A²Σ-X²Π 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 X²Π state of PO, Can. J. Phys., 1975, 53, 420. [all data]

Singh, 1959
Singh, N.L., Rotational analysis of the β 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 β-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 β-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 ion energetics data, Constants of diatomic molecules, References

Symbols used in this document:

EA Electron affinity
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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