return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Experimental > One molecule all properties

Experimental data for OH+ (hydoxyl cation)

22 02 02 11 45
Other names
Hydroxy radical; Hydroxyl; Hydroxy;
INChI INChIKey SMILES IUPAC name
InChI=1S/HO/h1H TUJKJAMUKRIRHC-UHFFFAOYSA-N [OH] Hydroxyl
State Conformation
2Π C*V
Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp)
Property Value Uncertainty units Reference Comment
Hfg(298.15K) enthalpy of formation 37.36 0.13 kJ mol-1 2006Rus/Pin:6592
Hfg(0K) enthalpy of formation 37.11 0.13 kJ mol-1 2006Rus/Pin:6592
Entropy (298.15K) entropy 183.74   J K-1 mol-1 Gurvich
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity 8.81   kJ mol-1 Gurvich
Heat Capacity (298.15K) heat capacity 29.89   J K-1 mol-1 Gurvich
Information can also be found for this species in the NIST Chemistry Webbook
Vibrational levels (cm-1) vibrations
Mode Number Symmetry Frequency Intensity Comment Description
Fundamental(cm-1) Harmonic(cm-1) Reference (km mol-1) unc. Reference
1 Σ 3570 3738 1979HUB/HER      

Detailed diatomic data
ωe ωexe ωeye Be αe ZPE reference
3737.761 84.8813 0.5409 18.9108 0.7242 1850.688 2007Iri:389

vibrational zero-point energy: 1784.8 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for OH+ (hydoxyl cation).
More spectroscopic constants are available at the NIST Physics Laboratory website:
http://physics.nist.gov/PhysRefData/MolSpec/Diatomic/Html/Tables/OH.html
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
  18.91080   1979HUB/HER

Calculated rotational constants for OH+ (hydoxyl cation).
Product of moments of inertia moments of inertia
0.8914287amu Å2   1.480276E-40gm cm2
Geometric Data
picture of hydoxyl cation

Point Group C∞v


Internal coordinates
distances (r) in Å, angles (a) in degrees, dihedrals (d) in degrees
Description Value unc. Connectivity Reference Comment
Atom 1 Atom 2 Atom 3 Atom 4
rOH 0.970   1 2 1979HUB/HER re

Cartesians
Atom x (Å) y (Å) z (Å)
O1 0.0000 0.0000 0.0000
H2 0.0000 0.0000 0.9697

Atom - Atom Distances bond lengths
Distances in Å
  O1 H2
O1   0.9697
H2 0.9697  

Calculated geometries for OH+ (hydoxyl cation).

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
H-O 1

Connectivity
Atom 1 Atom 2
O1 H2
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 2 1979HUB/HER 2Π
139.21 2 1979HUB/HER
32684.1 2 1979HUB/HER
69774 2 1979HUB/HER

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference
13.017 0.000 13.017   webbook

Electron Affinity (eV)
Electron Affinity unc. reference
1.828 0.000 webbook
Dipole, Quadrupole and Polarizability
Electric dipole moment dipole
State Config State description Conf description Exp. min. Dipole (Debye) Reference comment Point Group Components
x y z total dipole quadrupole
1 1 2Π C∞v True       1.668 NISTDiatomic MW μ0 C∞v 1 1
Experimental dipole measurement abbreviations: MW microwave; DT Dielectric with Temperature variation; DR Indirect (usually an upper limit); MB Molecular beam
Calculated electric dipole moments for OH+ (hydoxyl cation).
Electric quadrupole moment quadrupole
State Config State description Conf description Exp. min. Quadrupole (D Å) Reference comment Point Group Components
xx yy zz dipole quadrupole
1 1 2Π C∞v True       C∞v 1 1

Calculated electric quadrupole moments for OH+ (hydoxyl cation).

References
By selecting the following links, you may be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to [email protected].
squib reference DOI
1979HUB/HER Huber, K.P.; Herzberg, G., Molecular Spectra and Molecular Structure. IV. Constants of Diatomic Molecules, Van Nostrand Reinhold Co., 1979 10.1007/978-1-4757-0961-2
2006Rus/Pin:6592 B Ruscic, RE Pinzon, ML Morton, NK Srinivasan, M-C Su, JW Sutherland, JV Michael "Active Thermochemical Tables: Accurate Enthalpy of Formation of Hydroperoxyl Radical, HO2" J. Phys. Chem. A 2006, 110, 6592-6601 10.1021/jp056311j
2007Iri:389 KK Irikura "Experimental Vibrational Zero-Point Energies: Diatomic Molecules" J. Phys. Chem. Ref. Data 36(2), 389, 2007 10.1063/1.2436891
Gurvich Gurvich, L.V.; Veyts, I. V.; Alcock, C. B., Thermodynamic Properties of Individual Substances, Fouth Edition, Hemisphere Pub. Co., New York, 1989  
NISTdiatomic NIST Diatomic Spectral Database (www.physics.nist.gov/PhysRefData/MolSpec/Diatomic/index.html) 10.18434/T4T59X
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

Got a better number? Please email us at [email protected]


Browse
PreviousNext