Hydrocarboxyl radical


Gas phase ion energetics data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias

Data compiled as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
B - John E. Bartmess

View reactions leading to CHO2+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
Proton affinity (review)149.0kcal/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity141.2kcal/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Δf(+) ion143. ± 2.kcal/molN/AN/A 
Quantity Value Units Method Reference Comment
ΔfH(+) ion,0K141. ± 2.kcal/molN/AN/A 

Electron affinity determinations

EA (eV) Method Reference Comment
1.510 ± 0.010LPESJohnson, Harding, et al., 2011trans isomer. See Wang, Li, et al., 2014 for computational analysis; B
1.380 ± 0.010LPESJohnson, Harding, et al., 2011cis isomer; B
3.4961 ± 0.0010LPESGarand, Klein, et al., 2010B
1.18LPESLu, Hu, et al., 2007Stated EA is Vertical Detachment Energy. See also Johnson and Continetti, 2010 for cooled ions (same EA); B
2.180 ± 0.020LPESClements, Continetti, et al., 2002B
3.498 ± 0.015LPESKim, Bradforth, et al., 1995dHacid(0K) = 344.67±0.62 kcal/mol; B
3.54 ± 0.11D-EACaldwell, Renneboog, et al., 1989B

Ionization energy determinations

IE (eV) Method Reference Comment
8.20DERBerkowitz, Ellison, et al., 1994LL
8.486 ± 0.012PIRuscic, Schwartz, et al., 1989LL

Vibrational and/or electronic energy levels

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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:   X


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

a' 1 OH stretch 3635.70 gas LD Petty and Moore, 1993
1 OH stretch 3628.0 w m Ne IR Forney, Jacox, et al., 2003
1 OH stretch 3602.9 Ar IR Jacox, 1988
1 OH stretch 3570.8 N2 IR Mielke, Olbert-Majkut, et al., 2003
1 OH stretch 3456 CO IR Milligan and Jacox, 1971
2 C=O stretch 1852.57 gas DL Sears, Fawzy, et al., 1992
2 C=O stretch 1848.0 s Ne IR Forney, Jacox, et al., 2003
2 C=O stretch 1843.6 Ar IR Jacox, 1988
2 C=O stretch 1837.8 N2 IR Mielke, Olbert-Majkut, et al., 2003
2 C=O stretch 1833 CO IR Milligan and Jacox, 1971
3 HOC bend 1194 ± 10 gas PE Johnson, Poad, et al., 2011
3 HOC bend 1210.4 m Ne IR Forney, Jacox, et al., 2003
3 HOC bend 1211.2 Ar IR Jacox, 1988
3 HOC bend 1241.1 N2 IR Mielke, Olbert-Majkut, et al., 2003
3 HOC bend 1261 CO IR Milligan and Jacox, 1971
4 C-O stretch 1048 ± 10 gas PE Johnson, Poad, et al., 2011
4 C-O stretch 1050.4 w m Ne IR Forney, Jacox, et al., 2003
4 C-O stretch 1064.6 Ar IR Jacox, 1988
4 C-O stretch 1062.8 N2 IR Mielke, Olbert-Majkut, et al., 2003
4 C-O stretch 1077 CO IR Milligan and Jacox, 1971
5 OCO bend 629 ± 5 gas PE Johnson, Poad, et al., 2011
5 OCO bend 615 CO IR Milligan and Jacox, 1971
a 6 Torsion 508.1 w m Ne IR Forney, Jacox, et al., 2003
6 Torsion 515 Ar IR Jacox, 1988

Additional references: Jacox, 1994, page 167; Jacox, 1998, page 236; Radford, Wei, et al., 1992; Sears, Radford, et al., 1993; Petty and Moore, 1993, 2; Radford, Moore, et al., 1994; Oyama, Funato, et al., 2011

Notes

wWeak
mMedium
sStrong

References

Go To: Top, 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.

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]

Johnson, Harding, et al., 2011
Johnson, C.J.; Harding, M.E.; Poad, B.L.J.; Stanton, J.F.; Continetti, R.E., Electron Affinities, Well Depths, and Vibrational Spectroscopy of cis- and trans-HOCO, J. Am. Chem. Soc., 2011, 133, 49, 19606-19609, https://doi.org/10.1021/ja207724f . [all data]

Wang, Li, et al., 2014
Wang, J.; Li, J.; Ma, J.Y.; Guo, H., Full-dimensional characterization of photoelectron spectra of HOCO- and DOCO- and tunneling facilitated decay of HOCO prepared by anion photodetachment, Journal Of Chemical Physics, 2014, 140, 18, 184314, https://doi.org/10.1063/1.4874975 . [all data]

Garand, Klein, et al., 2010
Garand, E.; Klein, K.; Stanton, J.F.; Zhou, J.; Yacovitch, T.I.; Neumark, D.M., Vibronic Structure of the Formyloxyl Radical (HCO2) via Slow Photoelectron Velocity-Map Imaging Spectroscopy and Model Hamiltonian Calculations, J. Phys. Chem. A, 2010, 114, 3, 1374-1383, https://doi.org/10.1021/jp9067894 . [all data]

Lu, Hu, et al., 2007
Lu, Z.; Hu, Q.C.; Oakman, J.E.; Continetti, R.E., Dynamics on the HOCO potential energy surface studied by dissociative photodetachment of HOCO- and DOCO-, J. Chem. Phys., 2007, 126, 19, 194305, https://doi.org/10.1063/1.2731787 . [all data]

Johnson and Continetti, 2010
Johnson, C.J.; Continetti, R.E., Dissociative Photodetachment Studies of Cooled HOCO- Anions Revealing Dissociation Below the Barrier to H + CO2, J. Phys. Chem. Lett., 2010, 1, 12, 1895-1899, https://doi.org/10.1021/jz100621k . [all data]

Clements, Continetti, et al., 2002
Clements, T.G.; Continetti, R.E.; Francisco, J.S., Exploring the OH+CO - H+CO2 potential surface via dissociative photodetachment of (HOCO)(-), J. Chem. Phys., 2002, 117, 14, 6478-6488, https://doi.org/10.1063/1.1505439 . [all data]

Kim, Bradforth, et al., 1995
Kim, E.H.; Bradforth, S.E.; Arnold, D.W.; Metz, R.B.; Neumark, D.M., Study of HCO2 and DCO2 by Negative Ion Photoelectron Spectroscopy, J. Chem. Phys., 1995, 103, 18, 7801, https://doi.org/10.1063/1.470196 . [all data]

Caldwell, Renneboog, et al., 1989
Caldwell, G.; Renneboog, R.; Kebarle, P., Gas Phase Acidities of Aliphatic Carboxylic Acids, Based on Measurements of Proton Transfer Equilibria, Can. J. Chem., 1989, 67, 4, 661, https://doi.org/10.1139/v89-092 . [all data]

Berkowitz, Ellison, et al., 1994
Berkowitz, J.; Ellison, G.B.; Gutman, D., Three methods to measure RH bond energies, J. Phys. Chem., 1994, 98, 2744. [all data]

Ruscic, Schwartz, et al., 1989
Ruscic, B.; Schwartz, M.; Berkowitz, J., A photoionization study of the COOH species, J. Chem. Phys., 1989, 91, 6780. [all data]

Petty and Moore, 1993
Petty, J.T.; Moore, C.B., Transient Infrared Absorption Spectrum of the ν1 Fundamental of trans-HOCO, J. Mol. Spectrosc., 1993, 161, 1, 149, https://doi.org/10.1006/jmsp.1993.1223 . [all data]

Forney, Jacox, et al., 2003
Forney, D.; Jacox, M.E.; Thompson, W.E., Infrared spectra of trans-HOCO, HCOOH[sup +], and HCO[sub 2][sup -] trapped in solid neon, J. Chem. Phys., 2003, 119, 20, 10814, https://doi.org/10.1063/1.1621382 . [all data]

Jacox, 1988
Jacox, M.E., The vibrational spectrum of the t-HOCO free radical trapped in solid argon, J. Chem. Phys., 1988, 88, 8, 4598, https://doi.org/10.1063/1.453772 . [all data]

Mielke, Olbert-Majkut, et al., 2003
Mielke, Z.; Olbert-Majkut, A.; Tokhadze, K.G., Photolysis of the OC...HONO complex in low temperature matrices: Infrared detection and ab initio calculations of nitrosoformic acid, HOC(O)NO, J. Chem. Phys., 2003, 118, 3, 1364, https://doi.org/10.1063/1.1528897 . [all data]

Milligan and Jacox, 1971
Milligan, D.E.; Jacox, M.E., Infrared Spectrum and Structure of Intermediates in the Reaction of OH with CO, J. Chem. Phys., 1971, 54, 3, 927, https://doi.org/10.1063/1.1675022 . [all data]

Sears, Fawzy, et al., 1992
Sears, T.J.; Fawzy, W.M.; Johnson, P.M., Transient diode laser absorption spectroscopy of the ν2 fundamental of trans-HOCO and DOCO, J. Chem. Phys., 1992, 97, 6, 3996, https://doi.org/10.1063/1.462939 . [all data]

Johnson, Poad, et al., 2011
Johnson, C.J.; Poad, M.E. Harding.B.L.J.; Stanton, J.F.; Continetti, R.E., Electron Affinities, Well Depths, and Vibrational Spectroscopy of, J. Am. Chem. Soc., 2011, 133, 49, 19606, https://doi.org/10.1021/ja207724f . [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]

Radford, Wei, et al., 1992
Radford, H.E.; Wei, W.; Sears, T.J., The rotational spectrum of trans-HOCO and DOCO, J. Chem. Phys., 1992, 97, 6, 3989, https://doi.org/10.1063/1.462938 . [all data]

Sears, Radford, et al., 1993
Sears, T.J.; Radford, H.E.; Moore, M.A., b-dipole transitions in trans-HOCO observed by far infrared laser magnetic resonance, J. Chem. Phys., 1993, 98, 9, 6624, https://doi.org/10.1063/1.465098 . [all data]

Petty and Moore, 1993, 2
Petty, J.T.; Moore, C.B., Transient infrared absorption spectrum of the ν1 fundamental of trans-DOCO, J. Chem. Phys., 1993, 99, 1, 47, https://doi.org/10.1063/1.465773 . [all data]

Radford, Moore, et al., 1994
Radford, H.E.; Moore, M.A.; Sears, T.J.; Grussdorf, J.; Nolte, J.; Temps, F., Far-Infrared Laser Magnetic Resonance of X2A´ trans-DOCO, J. Mol. Spectrosc., 1994, 165, 1, 137, https://doi.org/10.1006/jmsp.1994.1116 . [all data]

Oyama, Funato, et al., 2011
Oyama, T.; Funato, W.; Sumiyoshi, Y.; Endo, Y., Observation of the pure rotational spectra of trans- and cis-HOCO, J. Chem. Phys., 2011, 134, 17, 174303, https://doi.org/10.1063/1.3578179 . [all data]


Notes

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