HOO anion
- Formula: HO2-
- Molecular weight: 33.0073
- CAS Registry Number: 14691-59-9
- Information on this page:
- Options:
Reaction thermochemistry data
Go To: Top, Gas phase ion energetics data, Vibrational and/or electronic energy levels, 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: 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
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 376.50 ± 0.50 | kcal/mol | G+TS | Ramond, Blanksby, et al., 2002 | gas phase; versus HCCH |
ΔrH° | 375.6 ± 2.1 | kcal/mol | G+TS | Bierbaum, Schmidt, et al., 1981 | gas phase; value altered from reference due to change in acidity scale |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 369.50 ± 0.40 | kcal/mol | IMRE | Ramond, Blanksby, et al., 2002 | gas phase; versus HCCH |
ΔrG° | 368.6 ± 2.0 | kcal/mol | IMRE | Bierbaum, Schmidt, et al., 1981 | gas phase; value altered from reference due to change in acidity scale |
Gas phase ion energetics data
Go To: Top, Reaction thermochemistry data, Vibrational and/or electronic energy levels, 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: John E. Bartmess
Protonation reactions
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 376.50 ± 0.50 | kcal/mol | G+TS | Ramond, Blanksby, et al., 2002 | gas phase; versus HCCH |
ΔrH° | 375.6 ± 2.1 | kcal/mol | G+TS | Bierbaum, Schmidt, et al., 1981 | gas phase; value altered from reference due to change in acidity scale |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 369.50 ± 0.40 | kcal/mol | IMRE | Ramond, Blanksby, et al., 2002 | gas phase; versus HCCH |
ΔrG° | 368.6 ± 2.0 | kcal/mol | IMRE | Bierbaum, Schmidt, et al., 1981 | gas phase; value altered from reference due to change in acidity scale |
Vibrational and/or electronic energy levels
Go To: Top, 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: Marilyn E. Jacox
State: ?
Energy (cm-1) |
Med. | Transition | λmin (nm) |
λmax (nm) |
References | ||
---|---|---|---|---|---|---|---|
Td = 8700 ± 50 | gas | Oakes, Harding, et al., 1985 | |||||
Clifford, Wenthold, et al., 1998 | |||||||
Ramond, Blanksby, et al., 2002, 2 | |||||||
State: X
Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
---|---|---|---|---|---|---|---|
a' | 3 | OO stretch | 775 ± 250 | gas | PE | Oakes, Harding, et al., 1985 | |
Additional references: Jacox, 1994, page 51; Jacox, 2003, page 44
Notes
d | Photodissociation threshold |
References
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Vibrational and/or electronic energy levels, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Ramond, Blanksby, et al., 2002
Ramond, T.M.; Blanksby, S.J.; Kato, S.; Bierbaum, V.M.; Davico, G.E.; Schwartz, R.L.; Lineberger, W.C.; Elliso,
Heat of formation of the hydroperoxyl radical HOO via negative ion studies,
J. Phys. Chem. A, 2002, 106, 42, 9641-9647, https://doi.org/10.1021/jp014614h
. [all data]
Bierbaum, Schmidt, et al., 1981
Bierbaum, V.M.; Schmidt, R.J.; DePuy, C.H.; Mead, R.H.; Schulz, P.A.; Lineberger, W.C.,
Reactions of carbanions with triplet and singlet molecular oxygen,
J. Am. Chem. Soc., 1981, 103, 6262. [all data]
Oakes, Harding, et al., 1985
Oakes, J.M.; Harding, L.B.; Ellison, G.B.,
The photoelectron spectroscopy of HO2-,
J. Chem. Phys., 1985, 83, 5400. [all data]
Clifford, Wenthold, et al., 1998
Clifford, E.P.; Wenthold, P.G.; Gareyev, R.; Lineberger, W.C.; DePuy, C.H.; Bierbaum, V.M.; Ellison, G.B.,
Photoelectron spectroscopy, gas phase acidity, and thermochemistry of tert-butyl hydroperoxide: Mechanisms for the rearrangement of peroxyl radicals,
J. Chem. Phys., 1998, 109, 23, 10293, https://doi.org/10.1063/1.477725
. [all data]
Ramond, Blanksby, et al., 2002, 2
Ramond, R.M.; Blanksby, S.J.; Kato, S.; Bierbaum, V.M.; Davico, G.E.; Schwartz, R.L.; Lineberger, W.C.; Ellison, G.B.,
Heat of Formation of the Hydroperoxyl Radical HOO Via Negative Ion Studies,
J. Phys. Chem. A, 2002, 106, 42, 9641, https://doi.org/10.1021/jp014614h
. [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
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Vibrational and/or electronic energy levels, References
- Symbols used in this document:
ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.