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Experimental data for C2H6O2 (1,2-Ethanediol)

22 02 02 11 45
Other names
1,2-Dihydroxyethane; 1,2-Ethandiol; 1,2-Ethanediol; 2-Hydroxyethanol; Athylenglykol; Dihydroxyethane; Dowtherm SR 1; Ethane-1,2-diol; Ethanediol; Ethylene alcohol; Ethylene dihydrate; Ethylene glycol; Ethylene gycol; Fridex; Glycol; Glycol alcohol; Glygen; Lutrol 9; M.e.g.; Macrogol 400 BPC; Monoethylene glycol; Norkool; Ramp; Tescol; Ucar 17; Zerex;
INChI INChIKey SMILES IUPAC name
InChI=1S/C2H6O2/c3-1-2-4/h3-4H,1-2H2 LYCAIKOWRPUZTN-UHFFFAOYSA-N OCCO Ethane-1,2-diol
State Conformation
1Ag C2H
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 -387.50   kJ mol-1 TRC
Hfg(0K) enthalpy of formation -367.90   kJ mol-1 TRC
Entropy (298.15K) entropy 303.81   J K-1 mol-1 TRC
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity 16.58   kJ mol-1 TRC
Heat Capacity (298.15K) heat capacity 77.99   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 C2H6O2 (1,2-Ethanediol).
Gas-phase IR spectra can be found in the NIST Chemistry Webbook here.
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 C2H6O2 (1,2-Ethanediol).
Product of moments of inertia moments of inertia
amu3Å6   0gm3 cm6
Geometric Data
picture of 1,2-Ethanediol

Point Group C2h


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
rCO 1.420   1 4 1992Kuchitsu(II/21) !assumed
rCC 1.530   1 2 1992Kuchitsu(II/21) !assumed
rOH 0.950   3 5 1992Kuchitsu(II/21) !assumed
rCH 1.093   1 9 1992Kuchitsu(II/21) !assumed
aCCO 107.8 1 2 3 1992Kuchitsu(II/21) !assumed
aHOC 104.5 1 4 6 1992Kuchitsu(II/21) !assumed
aHCC 109.47 1 2 7 1992Kuchitsu(II/21) !assumed
dHOCC 0 2 1 4 6 1992Kuchitsu(II/21)
dOCCO 53.64 3 2 1 4 1992Kuchitsu(II/21)

These cartesians were determined using some assumed coordinate values. Cartesians
Atom x (Å) y (Å) z (Å)

Atom - Atom Distances bond lengths
Distances in Å
 

Calculated geometries for C2H6O2 (1,2-Ethanediol).

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
H-C 4
H-O 2
C-C 1
C-O 2

Connectivity
Atom 1 Atom 2
C1 C2
C1 O4
C1 H9
C1 H10
C2 O3
C2 H7
C2 H8
O3 H5
O4 H6
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1Ag

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference
10.160   10.550   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 1Ag C2h True           C2h 0 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 C2H6O2 (1,2-Ethanediol).
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 1Ag C2h True       C2h 0 3

Calculated electric quadrupole moments for C2H6O2 (1,2-Ethanediol).
Electric dipole polarizability (Å3) polarizability
alpha unc. Reference
5.710   1998Gus/Rui:163

Calculated electric dipole polarizability for C2H6O2 (1,2-Ethanediol).

References
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squib reference DOI
1992Kuchitsu(II/21) Kuchitsu (ed.), Landolt-Bornstein: Group II: Atomic and Molecular Physics Volume 21: Structure Data of Free Polyatomic Molecules. Springer-Verlag, Berlin, 1992.  
1998Gus/Rui:163 M Gussoni, R Rui, G Zerbi "Electronic and relaxation contribution to linear molecular polarizability. An analysis of the experimental values" J. Mol. Struct. 447 (1998) 163-215 10.1016/S0022-2860(97)00292-5
TRC Frenkel, M; Marsh, K.N.; Wilhoit, R.C.; Kabo, G.J.; Roganov, G.N.,Thermodynamics of Organic Compounds in the Gas State,Thermodynamics Research Center, College Station, TX, 1994  
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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