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Experimental data for HOCH2COOH (Hydroxyacetic acid)

22 02 02 11 45
Other names
Acetic acid, hydroxy-; Glycolic acid; α-Hydroxyacetic acid; Glycollic acid; Hydroxyethanoic acid; 2-Hydroxyacetic acid;
INChI INChIKey SMILES IUPAC name
InChI=1S/C2H4O3/c3-1-2(4)5/h3H,1H2,(H,4,5) AEMRFAOFKBGASW-UHFFFAOYSA-N OC(CO)=O 2-Hydroxyacetic acid
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
Heat Capacity (298.15K) heat capacity 85.00 2.00 J K-1 mol-1 webbook
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

Calculated vibrational frequencies for HOCH2COOH (Hydroxyacetic acid).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment

Calculated rotational constants for HOCH2COOH (Hydroxyacetic acid).
Product of moments of inertia moments of inertia
amu3Å6   0gm3 cm6
Geometric Data
picture of Hydroxyacetic 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
rCC 1.495 0.006 1 2 1987Kuchitsu(II/15)
rCO 1.349 0.006 2 3 1987Kuchitsu(II/15)
rCO 1.210 0.006 2 4 1987Kuchitsu(II/15)
rCH 1.097 0.003 1 6 1987Kuchitsu(II/15)
rCO 1.406 0.004 1 5 1987Kuchitsu(II/15)
rOH 0.989 0.019 3 9 1987Kuchitsu(II/15)
rOH 0.956 0.003 5 8 1987Kuchitsu(II/15)
aCCO 112.6 0.5 1 2 3 1987Kuchitsu(II/15)
aCCO 124.2 0.4 1 2 4 1987Kuchitsu(II/15)
aCCO 111.3 0.4 2 1 5 1987Kuchitsu(II/15)
aHCC 108.8 0.3 2 1 6 1987Kuchitsu(II/15)
aHCO 110.6 0.3 5 1 6 1987Kuchitsu(II/15)
aHOC 105.5 1.1 2 3 9 1987Kuchitsu(II/15)
aHOC 105.2 0.1 1 5 8 1987Kuchitsu(II/15)
dHOCO 0 4 2 3 9 1987Kuchitsu(II/15)
dOCCO 0 4 2 1 5 1987Kuchitsu(II/15)
dHOCC 0 2 1 5 8 1987Kuchitsu(II/15)

Cartesians
Atom x (Å) y (Å) z (Å)

Atom - Atom Distances bond lengths
Distances in Å
 

Calculated geometries for HOCH2COOH (Hydroxyacetic acid).

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
C-C 1
H-C 2
C-O 2
C=O 1
H-O 2

Connectivity
Atom 1 Atom 2
C1 C2
C1 O5
C1 H6
C1 H7
C2 O3
C2 O4
O3 H9
O5 H8
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1A
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           Cs 2 3
1 2 1A C1 False           C1 3 5
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 HOCH2COOH (Hydroxyacetic 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
1 2 1A C1 False       C1 3 5

Calculated electric quadrupole moments for HOCH2COOH (Hydroxyacetic acid).

References
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squib reference DOI
1987Kuchitsu(II/15) Kuchitsu (ed.), Landolt-Bornstein: Group II: Atomic and Molecular Physics Volume 15: Structure Data of Free Polyatomic Molecules. Springer-Verlag, Berlin, 1987.  
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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