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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: wB97X-D/STO-3G

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/STO-3G
 hartrees
Energy at 0K-150.439176
Energy at 298.15K 
HF Energy-150.439176
Nuclear repulsion energy60.070550
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/STO-3G
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 3619 3619 16.88 50.56 0.22 0.36
2 A1 1919 1919 0.03 24.26 0.20 0.34
3 A1 1264 1264 0.28 2.90 0.31 0.47
4 A1 960 960 2.68 7.71 0.71 0.83
5 A2 779 779 0.00 0.22 0.75 0.86
6 B1 614 614 49.26 0.78 0.75 0.86
7 B2 3520 3520 149.16 17.44 0.75 0.86
8 B2 1024 1024 10.53 2.71 0.75 0.86
9 B2 584 584 3.56 10.30 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7142.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7142.4 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/STO-3G
ABC
1.09116 0.82547 0.46995

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/STO-3G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.924
C2 0.000 0.645 -0.467
C3 0.000 -0.645 -0.467
H4 0.000 1.647 -0.897
H5 0.000 -1.647 -0.897

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.53271.53272.45502.4550
C21.53271.28971.09062.3320
C31.53271.28972.33201.0906
H42.45501.09062.33203.2943
H52.45502.33201.09063.2943

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 65.118 O1 C2 H4 138.103
O1 C3 C2 65.118 O1 C3 H5 138.103
C2 O1 C3 49.763 C2 C3 H5 156.778
C3 C2 H4 156.778
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.153      
2 C -0.046      
3 C -0.046      
4 H 0.122      
5 H 0.122      


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 -1.576 1.576
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.280 0.000 0.000
y 0.000 -12.073 0.000
z 0.000 0.000 -16.272
Traceless
 xyz
x -2.107 0.000 0.000
y 0.000 4.203 0.000
z 0.000 0.000 -2.095
Polar
3z2-r2-4.191
x2-y2-4.207
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.448 0.000 0.000
y 0.000 2.797 0.000
z 0.000 0.000 1.557


<r2> (average value of r2) Å2
<r2> 30.755
(<r2>)1/2 5.546