Home Symbol which looks like a small house Up Solid circle with an upward pointer in it

Hydroperoxy radical

Data at NIST subscription sites:

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.


Gas phase thermochemistry data

Go To: Top, Reaction thermochemistry data, References, Notes

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
Deltafgas0.500kcal/molReviewChase, 1998Data last reviewed in September, 1978
Quantity Value Units Method Reference Comment
gas,1 bar54.754cal/mol*KReviewChase, 1998Data last reviewed in September, 1978

Gas Phase Heat Capacity (Shomate Equation)

Cp° = 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
    Cp = heat capacity (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

View plot Requires a JavaScript / HTML 5 canvas capable browser.

View table.

Temperature (K) 298. - 2000.2000. - 6000.
A 6.21644410.96441
B 8.3312862.106681
C -3.895937-0.391021
D 0.7434130.023435
E -0.004448-2.431597
F -1.706738-6.429757
G 59.9345163.70124
H 0.5000000.500000
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in September, 1978 Data last reviewed in September, 1978

Reaction thermochemistry data

Go To: Top, Gas phase thermochemistry 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: 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

Oxygen anion + Hydrogen cation = Hydroperoxy radical

By formula: O2- + H+ = HO2

Quantity Value Units Method Reference Comment
Deltar352.99 ± 0.72kcal/molD-EATravers, Cowles, et al., 1989gas phase
Quantity Value Units Method Reference Comment
Deltar346.67 ± 0.82kcal/molH-TSTravers, Cowles, et al., 1989gas phase

References

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

Travers, Cowles, et al., 1989
Travers, M.J.; Cowles, D.C.; Ellison, G.B., Reinvestigation of the Electron Affinities of O2 and NO, Chem. Phys. Lett., 1989, 164, 5, 449, https://doi.org/10.1016/0009-2614(89)85237-6 . [all data]


Notes

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