HO2NO2

Formula: HNO₄
Molecular weight: 79.0122
CAS Registry Number: 26404-66-0
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Data at other public NIST sites:
- Gas Phase Kinetics Database
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Vibrational and/or electronic energy levels

State: ?

Energy (cm^-1)		Med.	λ_min (nm)	λ_max (nm)	References


T_d = 30300	T	gas	190U	330	Graham, Winer, et al., 1978
					Cox and Patrick, 1979
					Morel, Simonaitis, et al., 1980
					Molina and Molina, 1981
					Singer, Crowley, et al., 1989
					May and Friedl, 1993
					Knight, Ravishankara, et al., 2002

State: X

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


a'	1	OH stretch	3540.1	w m	gas	IR	Niki, Maker, et al., 1977 Graham, Winer, et al., 1978 May and Friedl, 1993
	2	NO₂ a-stretch	1728.3	vs	gas	IR	Niki, Maker, et al., 1977 Graham, Winer, et al., 1977 Molina and Molina, 1981 May and Friedl, 1993
	2	NO₂ a-stretch	1726.2	vs	Ar	IR	Koch and Sodeau, 1995
	3	OH bend	1396.9	w m	gas	IR	Niki, Maker, et al., 1977 Graham, Winer, et al., 1977 Graham, Winer, et al., 1978 Molina and Molina, 1981 May and Friedl, 1993 Hojer, May, et al., 1996
	4	NO₂ s-stretch	1304.2	s	gas	IR	Niki, Maker, et al., 1977 Levine, Uselman, et al., 1977 Graham, Winer, et al., 1977 Graham, Winer, et al., 1978 Molina and Molina, 1981 May and Friedl, 1993
	4	NO₂ s-stretch	1292.7	m	Ar	IR	Koch and Sodeau, 1995
	5	O-O stretch	941.0	w	gas	IR	Niki, Maker, et al., 1977 Graham, Winer, et al., 1977 May and Peterson, 1991
			922.1	w	gas	IR	Niki, Maker, et al., 1977 Graham, Winer, et al., 1977
			919.2	w	gas	IR	Niki, Maker, et al., 1977 Graham, Winer, et al., 1977 May and Peterson, 1991
a'	6	NO₂ scissors	802.54	m	gas	IR DL	Niki, Maker, et al., 1977 Levine, Uselman, et al., 1977 Graham, Winer, et al., 1977 Graham, Winer, et al., 1978 Molina and Molina, 1981 May, Molina, et al., 1988 May and Friedl, 1993 Friedl, May, et al., 1994
	7	N-O stretch	648		gas	IR	Friedl, May, et al., 1994
	8	NO₂ rock	466		gas	IR	Friedl, May, et al., 1994
a	10	NO₂ wag	722		gas	IR	May and Peterson, 1991 Friedl, May, et al., 1994
	12	NO₂ torsion	145 ± 6		gas	MW	Suenram, Lovas, et al., 1986

Additional references: Jacox, 1994, page 341; Jacox, 1998, page 317; Jacox, 2003, page 324

Notes

Weak

Medium

Strong

Very strong

Tentative assignment or approximate value

Photodissociation threshold

References

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Graham, Winer, et al., 1978
Graham, R.A.; Winer, A.M.; Pitts, J.N., Jr., Ultraviolet and infrared absorption cross sections of gas phase HO, Geophys. Res. Lett., 1978, 5, 11, 909, https://doi.org/10.1029/GL005i011p00909 . [all data]

Cox and Patrick, 1979
Cox, R.A.; Patrick, K., Kinetics of the reaction HO2 + NO2(+M) = HO2NO2 using molecular modulation spectrometry, Int. J. Chem. Kinet., 1979, 11, 6, 635, https://doi.org/10.1002/kin.550110610 . [all data]

Morel, Simonaitis, et al., 1980
Morel, O.; Simonaitis, R.; Heicklen, J., Ultraviolet absorption spectra of HO2NO2, CCl3O2NO2, CCl2FO2NO2, and CH3O2NO2, Chem. Phys. Lett., 1980, 73, 1, 38, https://doi.org/10.1016/0009-2614(80)85197-9 . [all data]

Molina and Molina, 1981
Molina, L.T.; Molina, M.J., UV absorption cross sections of HO2NO2 vapor, J. Photochem., 1981, 15, 2, 97, https://doi.org/10.1016/0047-2670(81)85002-2 . [all data]

Singer, Crowley, et al., 1989
Singer, R.J.; Crowley, J.N.; Burrows, J.P.; Schneider, W.; Moortgat, G.K., Measurement of the absorption cross-section of peroxynitric acid between 210 and 330 nm in the range 253 -- 298 K, J. Photochem. Photobiol. A: Chem., 1989, 48, 1, 17, https://doi.org/10.1016/1010-6030(89)87086-8 . [all data]

May and Friedl, 1993
May, R.D.; Friedl, R.R., Integrated band intensities of HO2NO2 at 220 K, J. Quant. Spectrosc. Radiat. Transfer, 1993, 50, 3, 257, https://doi.org/10.1016/0022-4073(93)90076-T . [all data]

Knight, Ravishankara, et al., 2002
Knight, G.; Ravishankara, A.R.; Burkholder, J.B., UV absorption cross sections of HO2NO2 between 343 and 273 K, Phys. Chem. Chem. Phys., 2002, 4, 8, 1432, https://doi.org/10.1039/b108904h . [all data]

Niki, Maker, et al., 1977
Niki, H.; Maker, P.D.; Savage, C.M.; Breitenbach, L.P., Fourier transform IR spectroscopic observation of pernitric acid formed via HOO + NO2 → HOONO2, Chem. Phys. Lett., 1977, 45, 3, 564, https://doi.org/10.1016/0009-2614(77)80090-0 . [all data]

Graham, Winer, et al., 1977
Graham, R.A.; Winer, A.M.; Pitts, J.N., Jr., Temperature dependence of the unimolecular decomposition of pernitric acid and its atmospheric implications, Chem. Phys. Lett., 1977, 51, 2, 215, https://doi.org/10.1016/0009-2614(77)80387-4 . [all data]

Koch and Sodeau, 1995
Koch, T.G.; Sodeau, J.R., Photochemistry of Nitric Acid in Low-Temperature Matrixes, J. Phys. Chem., 1995, 99, 27, 10824, https://doi.org/10.1021/j100027a023 . [all data]

Hojer, May, et al., 1996
Hojer, S.; May, R.D.; Miller, C.E., Intensities of the 1397 cm-1 (v3) band of HO2NO2 and feasibility of atmospheric detection, J. Quant. Spectrosc. Radiat. Transfer, 1996, 55, 2, 273, https://doi.org/10.1016/0022-4073(95)00132-8 . [all data]

Levine, Uselman, et al., 1977
Levine, S.Z.; Uselman, W.M.; Chan, W.H.; Calvert, J.G.; Shaw, J.H., The kinetics and mechanisms of the HO2-NO2 reactions; the significance of peroxynitric acid formation in photochemical smog, Chem. Phys. Lett., 1977, 48, 3, 528, https://doi.org/10.1016/0009-2614(77)85086-0 . [all data]

May and Peterson, 1991
May, R.D.; Peterson, D.B., Observation of the O«58872»O stretch fundamental band of HO2NO2, J. Mol. Spectrosc., 1991, 150, 2, 647, https://doi.org/10.1016/0022-2852(91)90256-A . [all data]

May, Molina, et al., 1988
May, R.D.; Molina, L.T.; Webster, C.R., Tunable diode laser measurements of peroxynitric acid absorption coefficients near 12.5 .mu.m, J. Phys. Chem., 1988, 92, 16, 4667, https://doi.org/10.1021/j100327a022 . [all data]

Friedl, May, et al., 1994
Friedl, R.R.; May, R.D.; Duxbury, G., The ν6, ν7, ν8, and ν10 Bands of HO2NO2, J. Mol. Spectrosc., 1994, 165, 2, 481, https://doi.org/10.1006/jmsp.1994.1151 . [all data]

Suenram, Lovas, et al., 1986
Suenram, R.D.; Lovas, F.J.; Pickett, H.M., The microwave spectrum and molecular conformation of peroxynitric acid (HOONO2), J. Mol. Spectrosc., 1986, 116, 2, 406, https://doi.org/10.1016/0022-2852(86)90136-0 . [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, 1998
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules: supplement A, J. Phys. Chem. Ref. Data, 1998, 27, 2, 115-393, https://doi.org/10.1063/1.556017 . [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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Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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