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Experimental data for HOBr (Hypobromous acid)

22 02 02 11 45
INChI INChIKey SMILES IUPAC name
InChI=1S/BrHO/c1-2/h2H CUILPNURFADTPE-UHFFFAOYSA-N BrO
State Conformation
1A' CS
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   1.80 kJ mol-1 2001Joe:11041
Hfg(0K) enthalpy of formation -47.70 1.80 kJ mol-1 2001Joe:11041
Entropy (298.15K) entropy     J K-1 mol-1  
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity     kJ mol-1  
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 A' 3615   webbook       OH stretch
2 A' 1163   webbook       bend
3 A' 620   webbook       OBr stretch

vibrational zero-point energy: 2698.8 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for HOBr (Hypobromous acid).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
20.47007 0.35280 0.34634 1989Kog/Tak:467

Calculated rotational constants for HOBr (Hypobromous acid).
Product of moments of inertia moments of inertia
1915.315amu3Å6   8.77017236996777E-117gm3 cm6
Geometric Data
picture of Hypobromous acid

Point Group Cs


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
rBrO 1.834   2 3 1989Kog/Tak:467 rs
rOH 0.961   1 2 1989Kog/Tak:467 rs
aHOBr 102.3 1 2 3 1989Kog/Tak:467 rs

Cartesians
Atom x (Å) y (Å) z (Å)
H1 -0.9176 1.6589 0.0000
O2 0.0213 1.4542 0.0000
Br3 0.0213 -0.3798 0.0000

Atom - Atom Distances bond lengths
Distances in Å
  H1 O2 Br3
H1   0.96102.2445
O2 0.9610   1.8340
Br3 2.24451.8340  

Calculated geometries for HOBr (Hypobromous acid).

Experimental Bond Angles (degrees) from cartesians bond angles

atom1 atom2 atom3 angle
H1 O2 Br3 102.300

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
O-Br 1

Connectivity
Atom 1 Atom 2
H1 O2
O2 Br3
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1A'

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference
10.642 0.005     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 1A' Cs True   1.384 0.000 1.384 1989Kog/Tak:467 MW μ0 DO79Br +-0.01 D μa < 0.01 D Cs 2 3
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 HOBr (Hypobromous acid).
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 1A' Cs True       Cs 2 3

Calculated electric quadrupole moments for HOBr (Hypobromous acid).

References
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squib reference DOI
1989Kog/Tak:467 Y Koga, H Takeo, S Kondo, M Sugie, C Matsumura, GA McRae, EA Cohen "The Rotational Spectra, Molecular Sturcture, Dipole Moment and Hyperfine Constants of HOBr and DOBr" J. Mol. Spec. 138, 467-481 (1989) 10.1016/0022-2852(89)90013-1
2001Joe:11041 J A Joens, "The Dissociation Energy of OH(X2Pi3/2) and the Enthalpy of formation of OH (X2Pi3/2), ClOH, and BrOH from Thermochemical Cycles" J. Phys. Chem. A 2001, 105, 11041-11044 10.1021/jp011833u
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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