Formyl cation

• Formula: CHO⁺
• Molecular weight: 29.0175
• IUPAC Standard InChI: InChI=1S/CHO/c1-2/h1H/q+1 Copy

  
• IUPAC Standard InChIKey: XPRMKTHGXOVKEH-UHFFFAOYSA-N Copy
• CAS Registry Number: 17030-74-9
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  The 3d structure may be viewed using Java or Javascript.
• Other names: Formyl, unipositive ion; Methylium, oxo-; HCO; HCO+
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Ion clustering data
  • Vibrational and/or electronic energy levels
  • References
  • Notes
• Other data available:
  • Reaction thermochemistry data
• Data at other public NIST sites:
  • Microwave spectra (on physics lab web site)
• Options:
  • Switch to SI units

Ion clustering data

Go To: Top, 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: Michael M. Meot-Ner (Mautner) and Sharon G. Lias

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

 +  = ( • )

By formula: CHO⁺ + CO = (CHO⁺ • CO)

( • ) +  = ( • 2)

By formula: (CHO⁺ • CO) + CO = (CHO⁺ • 2CO)

( • 2) +  = ( • 3)

By formula: (CHO⁺ • 2CO) + CO = (CHO⁺ • 3CO)

( • 3) +  = ( • 4)

By formula: (CHO⁺ • 3CO) + CO = (CHO⁺ • 4CO)

( • 4) +  = ( • 5)

By formula: (CHO⁺ • 4CO) + CO = (CHO⁺ • 5CO)

( • 5) +  = ( • 6)

By formula: (CHO⁺ • 5CO) + CO = (CHO⁺ • 6CO)

( • 6) +  = ( • 7)

By formula: (CHO⁺ • 6CO) + CO = (CHO⁺ • 7CO)

( • 7) +  = ( • 8)

By formula: (CHO⁺ • 7CO) + CO = (CHO⁺ • 8CO)

( • 8) +  = ( • 9)

By formula: (CHO⁺ • 8CO) + CO = (CHO⁺ • 9CO)

( • 9) +  = ( • 10)

By formula: (CHO⁺ • 9CO) + CO = (CHO⁺ • 10CO)

( • 10) +  = ( • 11)

By formula: (CHO⁺ • 10CO) + CO = (CHO⁺ • 11CO)

( • 11) +  = ( • 12)

By formula: (CHO⁺ • 11CO) + CO = (CHO⁺ • 12CO)

( • 12) +  = ( • 13)

By formula: (CHO⁺ • 12CO) + CO = (CHO⁺ • 13CO)

( • 13) +  = ( • 14)

By formula: (CHO⁺ • 13CO) + CO = (CHO⁺ • 14CO)

( • 14) +  = ( • 15)

By formula: (CHO⁺ • 14CO) + CO = (CHO⁺ • 15CO)

 +  = ( • )

By formula: CHO⁺ + CO₂ = (CHO⁺ • CO₂)

( • ) +  = ( • 2)

By formula: (CHO⁺ • CO₂) + CO₂ = (CHO⁺ • 2CO₂)

( • 2) +  = ( • 3)

By formula: (CHO⁺ • 2CO₂) + CO₂ = (CHO⁺ • 3CO₂)

( • 3) +  = ( • 4)

By formula: (CHO⁺ • 3CO₂) + CO₂ = (CHO⁺ • 4CO₂)

 +  = ( • )

By formula: CHO⁺ + H₂ = (CHO⁺ • H₂)

Vibrational and/or electronic energy levels

Go To: Top, Ion clustering 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:   X

Additional references: Jacox, 1994, page 37; Jacox, 1998, page 145; Jacox, 2003, page 33; Dyke, Jonathan, et al., 1980; Bogey, Demuynck, et al., 1981; Sastry, Herbst, et al., 1981; Woods, Saykally, et al., 1981; Foster and McKellar, 1984; Kawaguchi, McKellar, et al., 1986; Dyke, 1987; Woods, 1988; Ohshima, Sumiyoshi, et al., 1997; Olkhov, Nizkorodov, et al., 1997; Foltynowicz, Robinson, et al., 2001; Foltynowicz, Robinson, et al., 2001, 2; Dore, Beninati, et al., 2003

Notes

References

Go To: Top, Ion clustering 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.

Jennings, Headley, et al., 1982
Jennings, K.R.; Headley, J.V.; Mason, R.S., The Temperature Dependence of Ion - Molecule Association Reactions, Int. J. Mass. Spectrom. Ion Phys, 1982, 45, 315. [all data]

Hiraoka, Saluja, et al., 1979
Hiraoka, K.; Saluja, P.P.S.; Kebarle, P., Stabilities of Complexes (N2)nH+, (CO)nH+ and (O2)nH+ for n = 1 to 7 Based on Gas Phase Ion Equilibrium Measurements, Can. J. Chem., 1979, 57, 16, 2159, https://doi.org/10.1139/v79-346 . [all data]

Meot-Ner (Mautner) and Field, 1974
Meot-Ner (Mautner), M.; Field, F.H., Kinetics and Thermodynamics of the Association of CO+ with CO and of N2+ with N2 between 120 and 650 K, J. Chem. Phys., 1974, 61, 9, 3742, https://doi.org/10.1063/1.1682560 . [all data]

Hiraoka and Mori, 1989
Hiraoka, K.; Mori, T., Gas Phase Stabilities of the Cluster Ions H+(CO)2(CO)n, H+(N2)2(N2)n and H+(O2)2(O2)n with n = 1 - 14, Chem. Phys., 1989, 137, 1-3, 345, https://doi.org/10.1016/0301-0104(89)87119-8 . [all data]

Hiraoka, Shoda, et al., 1986
Hiraoka, K.; Shoda, T.; Morise, K.; Yamabe, S.; Kawai, E.; Hirao, K., Stability and structure of cluster ions in the gas phase: Carbon dioxide with Cl^-, H₃O⁺, HCO₂⁺ and HCO⁺, J. Chem. Phys., 1986, 84, 2091. [all data]

Hiraoka and Kebarle, 1975
Hiraoka, K.; Kebarle, P., Stability and Structure of H3CO+ Formed from COH+ + H2 at Low Temperature, J. Chem. Phys., 1975, 63, 4, 1688, https://doi.org/10.1063/1.431499 . [all data]

Gudeman, Begemann, et al., 1983
Gudeman, C.S.; Begemann, M.H.; Pfaff, J.; Saykally, R.J., Velocity-Modulated Infrared Laser Spectroscopy of Molecular Ions: The ν_{1} Band of HCO^{+}, Phys. Rev. Lett., 1983, 50, 10, 727, https://doi.org/10.1103/PhysRevLett.50.727 . [all data]

Amano, 1983
Amano, T., The ν1 fundamental band of HCO+ by difference frequency laser spectroscopy, J. Chem. Phys., 1983, 79, 7, 3595, https://doi.org/10.1063/1.446216 . [all data]

Owrutsky, Keim, et al., 1989
Owrutsky, J.C.; Keim, E.R.; Coe, J.V.; Saykally, R.J., Absolute IR intensities of the .nu.1 bands of hydrodinitrogen(1+) and oxomethylium determined by direct laser absorption spectroscopy in fast ion beams, J. Phys. Chem., 1989, 93, 16, 5960, https://doi.org/10.1021/j100353a003 . [all data]

Keim, Polak, et al., 1990
Keim, E.R.; Polak, M.L.; Owrutsky, J.C.; Coe, J.V.; Saykally, R.J., Absolute infrared vibrational band intensities of molecular ions determined by direct laser absorption spectroscopy in fast ion beams, J. Chem. Phys., 1990, 93, 5, 3111, https://doi.org/10.1063/1.458845 . [all data]

Nizkorodov, Maier, et al., 1995
Nizkorodov, S.A.; Maier, J.P.; Bieske, E.J., The infrared spectrum of He--HCO+, J. Chem. Phys., 1995, 103, 4, 1297, https://doi.org/10.1063/1.469806 . [all data]

Nizkorodov, Dopfer, et al., 1996
Nizkorodov, S.A.; Dopfer, O.; Meuwly, M.; Maier, J.P.; Bieske, E.J., Mid-infrared spectra of the proton-bound complexes Nen--HCO+ (n=1,2), J. Chem. Phys., 1996, 105, 5, 1770, https://doi.org/10.1063/1.472052 . [all data]

Nizkorodov, Dopfer, et al., 1995
Nizkorodov, S.A.; Dopfer, O.; Ruchti, T.; Meuwly, M.; Maier, J.P.; Bieske, E.J., Size Effects in Cluster Infrared Spectra: the .nu.1 Band of Arn-HCO+ (n = 1-13), J. Phys. Chem., 1995, 99, 47, 17118, https://doi.org/10.1021/j100047a013 . [all data]

Bieske, Nizkorodov, et al., 1995
Bieske, E.J.; Nizkorodov, S.A.; Bennett, F.R.; Maier, J.P., The infrared spectrum of the H2--HCO+ complex, J. Chem. Phys., 1995, 102, 13, 5152, https://doi.org/10.1063/1.469240 . [all data]

Davies and Rothwell, 1984
Davies, P.B.; Rothwell, W.J., Diode laser detection of the bending mode of HCO+, J. Chem. Phys., 1984, 81, 12, 5239, https://doi.org/10.1063/1.447688 . [all data]

Kawaguchi, Yamada, et al., 1985
Kawaguchi, K.; Yamada, C.; Saito, S.; Hirota, E., Magnetic field modulated infrared laser spectroscopy of molecular ions: The ν2 band of HCO+, J. Chem. Phys., 1985, 82, 4, 1750, https://doi.org/10.1063/1.448407 . [all data]

Foltynowicz, Robinson, et al., 2000
Foltynowicz, R.J.; Robinson, J.D.; Zuckerman, E.J.; Hedderich, H.G.; Grant, E.R., Experimental Characterization of the Higher Vibrationally Excited States of HCO+: Determination of ω2, x22, g22, and B(030), J. Mol. Spectrosc., 2000, 199, 2, 147, https://doi.org/10.1006/jmsp.1999.8014 . [all data]

Foster, McKellar, et al., 1984
Foster, S.C.; McKellar, A.R.W.; Sears, T.J., Observation of the ν3 fundamental band of HCO+, J. Chem. Phys., 1984, 81, 1, 578, https://doi.org/10.1063/1.447344 . [all data]

Davies, Hamilton, et al., 1984
Davies, P.B.; Hamilton, P.A.; Rothwell, W.J., Infrared laser spectroscopy of the ν3 fundamental of HCO+, J. Chem. Phys., 1984, 81, 4, 1598, https://doi.org/10.1063/1.447889 . [all data]

Liu, Lee, et al., 1988
Liu, D.-J.; Lee, S.-T.; Oka, T., The ν3 fundamental band of HCNH+ and the 2ν3 ← ν3 and ν2 + ν3 ← ν2 hot bands of HCO+, J. Mol. Spectrosc., 1988, 128, 1, 236, https://doi.org/10.1016/0022-2852(88)90221-4 . [all data]

Linnartz, Speck, et al., 1998
Linnartz, H.; Speck, T.; Maier, J.P., High-resolution infrared spectrum of the ν3 band in Ar--HCO+, Chem. Phys. Lett., 1998, 288, 2-4, 504, https://doi.org/10.1016/S0009-2614(98)00304-2 . [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]

Dyke, Jonathan, et al., 1980
Dyke, J.M.; Jonathan, N.B.H.; Morris, A.; Winter, M.J., The first ionization potential of the formyl radical, HCO(X²A'), studied using photoelectron spectroscopy, Mol. Phys., 1980, 39, 629. [all data]

Bogey, Demuynck, et al., 1981
Bogey, M.; Demuynck, C.; Destombes, J.L., Centrifugal distortion effects in HCO, Mol. Phys., 1981, 43, 5, 1043, https://doi.org/10.1080/00268978100101861 . [all data]

Sastry, Herbst, et al., 1981
Sastry, K.V.L.N.; Herbst, E.; De Lucia, F.C., Millimeter and submillimeter spectra of HCO+ and DCO+, J. Chem. Phys., 1981, 75, 8, 4169, https://doi.org/10.1063/1.442513 . [all data]

Woods, Saykally, et al., 1981
Woods, R.C.; Saykally, R.J.; Anderson, T.G.; Dixon, T.A.; Szanto, P.G., The molecular structure of HCO+ by the microwave substitution method, J. Chem. Phys., 1981, 75, 9, 4256, https://doi.org/10.1063/1.442627 . [all data]

Foster and McKellar, 1984
Foster, S.C.; McKellar, A.R.W., The ν3 fundamental bands of HN+2, DN+2, and DCO+, J. Chem. Phys., 1984, 81, 8, 3424, https://doi.org/10.1063/1.448066 . [all data]

Kawaguchi, McKellar, et al., 1986
Kawaguchi, K.; McKellar, A.R.W.; Hirota, E., Magnetic field modulated infrared laser spectroscopy of molecular ions: The ν1 band of DCO+, J. Chem. Phys., 1986, 84, 3, 1146, https://doi.org/10.1063/1.450503 . [all data]

Dyke, 1987
Dyke, J.M., J. Chem. Soc., 1987, Faraday Trans. 2 83, 69. [all data]

Woods, 1988
Woods, R.C., Microwave Spectroscopy of Molecular Ions in the Laboratory and in Space [and Discussion], Phil. Trans. Roy. Soc. (London) A324, 1988, 324, 1578, 141, https://doi.org/10.1098/rsta.1988.0007 . [all data]

Ohshima, Sumiyoshi, et al., 1997
Ohshima, Y.; Sumiyoshi, Y.; Endo, Y., Rotational spectrum of the Ar--HCO+ ionic complex, J. Chem. Phys., 1997, 106, 7, 2977, https://doi.org/10.1063/1.473416 . [all data]

Olkhov, Nizkorodov, et al., 1997
Olkhov, R.V.; Nizkorodov, S.A.; Dopfer, O., Hindered rotation in ion-neutral molecular complexes: The ν[sub 1] vibration of H[sub 2]--HCO[sup +] and D[sub 2]--DCO[sup +], J. Chem. Phys., 1997, 107, 20, 8229, https://doi.org/10.1063/1.475027 . [all data]

Foltynowicz, Robinson, et al., 2001
Foltynowicz, R.J.; Robinson, J.D.; Grant, E.R., Double-resonant photoionization efficiency spectroscopy: A precise determination of the adiabatic ionization potential of DCO, J. Chem. Phys., 2001, 114, 12, 5224, https://doi.org/10.1063/1.1349080 . [all data]

Foltynowicz, Robinson, et al., 2001, 2
Foltynowicz, R.J.; Robinson, J.D.; Grant, E.R., An experimental measure of anharmonicity in the bending of DCO[sup +], J. Chem. Phys., 2001, 115, 2, 878, https://doi.org/10.1063/1.1379336 . [all data]

Dore, Beninati, et al., 2003
Dore, L.; Beninati, S.; Puzzarini, C.; Cazzoli, G., Study of vibrational interactions in DCO[sup +] by millimeter-wave spectroscopy and determination of the equilibrium structure of the formyl ion, J. Chem. Phys., 2003, 118, 17, 7857, https://doi.org/10.1063/1.1564042 . [all data]

Notes

Go To: Top, Ion clustering data, Vibrational and/or electronic energy levels, References

• Symbols used in this document:
  

  ΔrH°	Enthalpy of reaction at standard conditions
  ΔrS°	Entropy 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.