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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: wB97X-D/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at wB97X-D/Def2TZVPP
 hartrees
Energy at 0K-152.481441
Energy at 298.15K 
HF Energy-152.481441
Nuclear repulsion energy61.898016
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at wB97X-D/Def2TZVPP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3415 3262 3.00 80.72 0.18 0.30
2 A1 1859 1776 2.42 78.34 0.13 0.24
3 A1 1098 1049 13.78 7.10 0.52 0.68
4 A1 909 868 60.95 6.76 0.69 0.82
5 A2 703 671 0.00 4.84 0.75 0.86
6 B1 566 540 92.31 0.10 0.75 0.86
7 B2 3340 3191 55.41 15.86 0.75 0.86
8 B2 986 942 6.62 2.10 0.75 0.86
9 B2 204 195 4.53 14.47 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6540.2 cm-1
Scaled (by 0.9552) Zero Point Vibrational Energy (zpe) 6247.2 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at wB97X-D/Def2TZVPP
ABC
1.12883 0.89925 0.50052

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.884
C2 0.000 0.628 -0.458
C3 0.000 -0.628 -0.458
H4 0.000 1.645 -0.791
H5 0.000 -1.645 -0.791

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.48221.48222.34792.3479
C21.48221.25691.06972.2978
C31.48221.25692.29781.0697
H42.34791.06972.29783.2901
H52.34792.29781.06973.2901

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.912 O1 C2 H4 133.224
O1 C3 C2 64.912 O1 C3 H5 133.224
C2 O1 C3 50.177 C2 C3 H5 161.864
C3 C2 H4 161.864
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.391      
2 C -0.033      
3 C -0.033      
4 H 0.228      
5 H 0.228      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -2.419 2.419
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.521 0.000 0.000
y 0.000 -11.577 0.000
z 0.000 0.000 -18.736
Traceless
 xyz
x -3.364 0.000 0.000
y 0.000 7.051 0.000
z 0.000 0.000 -3.687
Polar
3z2-r2-7.374
x2-y2-6.944
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.474 0.000 0.000
y 0.000 4.662 0.000
z 0.000 0.000 3.459


<r2> (average value of r2) Å2
<r2> 30.344
(<r2>)1/2 5.509