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Experimental data for CH2CHOH (ethenol)

22 02 02 11 45
Other names
Vinyl alcohol; Hydroxyethylene; ethenol;
INChI INChIKey SMILES IUPAC name
InChI=1S/C2H4O/c1-2-3/h2-3H,1H2 IMROMDMJAWUWLK-UHFFFAOYSA-N C=CO ethenol
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 -128.00   kJ mol-1 webbook
Hfg(0K) enthalpy of formation     kJ 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
1 A' 3634   webbook      
2 A' 3122          
3 A'            
4 A'            
5 A' 1663          
6 A' 1412          
7 A' 1300          
8 A' 1260          
9 A' 1118          
10 A' 948          
11 A' 486          
12 A" 960          
13 A" 817          
14 A" 699          
15 A" 388          

vibrational zero-point energy: 8902.5 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for CH2CHOH (ethenol).
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 CH2CHOH (ethenol).
Product of moments of inertia moments of inertia
amu3Å6   0gm3 cm6
Geometric Data
picture of ethenol

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 1.326 0.005 1 2 1987Kuchitsu(II/15)
rCO 1.372 0.004 2 3 1987Kuchitsu(II/15)
rCH 1.097 0.005 2 6 1987Kuchitsu(II/15)
rCH 1.079 0.004 1 5 1987Kuchitsu(II/15)
rCH 1.086 0.004 1 4 1987Kuchitsu(II/15)
rOH 0.960 0.003 3 7 1987Kuchitsu(II/15)
aCCO 126.2 0.5 1 2 3 1987Kuchitsu(II/15)
aHCC 129.1 1.1 1 2 6 1987Kuchitsu(II/15)
aHCC 121.7 0.4 2 1 4 1987Kuchitsu(II/15)
aHCC 119.5 0.5 2 1 5 1987Kuchitsu(II/15)
aHOC 108.3 0.3 2 3 7 1987Kuchitsu(II/15)

Cartesians
Atom x (Å) y (Å) z (Å)

Atom - Atom Distances bond lengths
Distances in Å
 

Calculated geometries for CH2CHOH (ethenol).

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
C-O 1
H-C 3
H-O 1

Connectivity
Atom 1 Atom 2
C1 C2
C1 H4
C1 H5
C2 O3
C2 H6
O3 H7
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
9.330 0.010     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           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 CH2CHOH (ethenol).
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 CH2CHOH (ethenol).

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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