HO2P

Formula: HO₂P
Molecular weight: 63.9805
CAS Registry Number: 14097-15-5
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Other data available:
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Gas phase ion energetics data

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Data compiled by: John E. Bartmess

De-protonation reactions

O₂P^- + = HO₂P

By formula: O₂P^- + H⁺ = HO₂P

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1376. ± 18.	kJ/mol	D-EA	N/A	gas phase
Δ_rH°	1376. ± 17.	kJ/mol	Endo	Viggiano, Morris, et al., 1991	gas phase
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	1349. ± 18.	kJ/mol	H-TS	Viggiano, Morris, et al., 1991	gas phase

Vibrational and/or electronic energy levels

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Data compiled by: Marilyn E. Jacox

State: X

Vib. sym.	No.	Approximate type of mode	cm^-1	Med.	Method	References


a'	1	OH stretch	3550.7	Ar	IR	Withnall and Andrews, 1988
	2	P=O stretch	1258.54	gas	DL	O'Sullivan, Hamilton, et al., 2006
	2	P=O stretch	1252.6	Ar	IR	Withnall and Andrews, 1988
	4	P-O stretch	851.07	gas	DL	Bell, Ahmad, et al., 2000
	4	P-O stretch	841.5	Ar	IR	Withnall and Andrews, 1988
a	6	Torsion	523.9	Ar	IR	Withnall and Andrews, 1988

Additional references: Jacox, 1994, page 174; Jacox, 2003, page 198

References

Go To: Top, Gas phase ion energetics data, Vibrational and/or electronic energy levels, Notes

Viggiano, Morris, et al., 1991
Viggiano, A.A.; Morris, R.A.; Dale, F.; Paulson, J.F.; Henshman, M.J.; Miller, T.M.; Miller, S., The Gas Phase Acidities of HPO3 and HPO2: Enthalpies of Deprotonation, J. Phys. Chem., 1991, 95, 3, 1275, https://doi.org/10.1021/j100156a044 . [all data]

Withnall and Andrews, 1988
Withnall, R.; Andrews, L., Infrared spectra of oxygen atom-phosphine reaction products trapped in solid argon, J. Phys. Chem., 1988, 92, 16, 4610, https://doi.org/10.1021/j100327a012 . [all data]

O'Sullivan, Hamilton, et al., 2006
O'Sullivan, P.J.; Hamilton, P.A.; Davies, P.B.; Turney, J.M.; Schaefer, H.F., III, Diode laser spectroscopy of the ν2 fundamental band of cis-HOPO, J. Mol. Spectrosc., 2006, 235, 2, 248, https://doi.org/10.1016/j.jms.2005.11.013 . [all data]

Bell, Ahmad, et al., 2000
Bell, I.S.; Ahmad, I.K.; Hamilton, P.A.; Davies, P.B., Detection of the transient molecule HOPO in the gas phase by infrared laser spectroscopy, Chem. Phys. Lett., 2000, 320, 3-4, 311, https://doi.org/10.1016/S0009-2614(00)00238-4 . [all data]

Jacox, 1994
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules, American Chemical Society, Washington, DC, 1994, 464. [all data]

Jacox, 2003
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules: supplement B, J. Phys. Chem. Ref. Data, 2003, 32, 1, 1-441, https://doi.org/10.1063/1.1497629 . [all data]

Notes

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Symbols used in this document:

Δ_rG° Free energy of reaction at standard conditions

Δ_rH° Enthalpy of reaction at standard conditions
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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Δ_rG°	Free energy of reaction at standard conditions
Δ_rH°	Enthalpy of reaction at standard conditions