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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: HSEh1PBE/daug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HSEh1PBE/daug-cc-pVTZ
 hartrees
Energy at 0K-152.371727
Energy at 298.15K 
HF Energy-152.371727
Nuclear repulsion energy61.890691
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 HSEh1PBE/daug-cc-pVTZ
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 3410 3410 3.20 83.16 0.18 0.31
2 A1 1847 1847 3.49 97.35 0.08 0.15
3 A1 1095 1095 18.73 6.00 0.71 0.83
4 A1 911 911 62.16 5.41 0.71 0.83
5 A2 687 687 0.00 5.33 0.75 0.86
6 B1 564 564 86.88 0.02 0.75 0.86
7 B2 3336 3336 55.51 15.06 0.75 0.86
8 B2 980 980 6.95 2.29 0.75 0.86
9 B2 213 213 3.29 15.99 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6520.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6520.7 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 HSEh1PBE/daug-cc-pVTZ
ABC
1.12463 0.90221 0.50061

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/daug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.883
C2 0.000 0.630 -0.457
C3 0.000 -0.630 -0.457
H4 0.000 1.648 -0.788
H5 0.000 -1.648 -0.788

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.48091.48092.34662.3466
C21.48091.25941.07032.3013
C31.48091.25942.30131.0703
H42.34661.07032.30133.2956
H52.34662.30131.07033.2956

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.836 O1 C2 H4 133.141
O1 C3 C2 64.836 O1 C3 H5 133.141
C2 O1 C3 50.327 C2 C3 H5 162.022
C3 C2 H4 162.022
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.838      
2 C -0.444      
3 C -0.444      
4 H 0.862      
5 H 0.862      


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 -2.299 2.299
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.783 0.000 0.000
y 0.000 -11.727 0.000
z 0.000 0.000 -19.097
Traceless
 xyz
x -3.371 0.000 0.000
y 0.000 7.212 0.000
z 0.000 0.000 -3.841
Polar
3z2-r2-7.683
x2-y2-7.056
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.218 0.000 0.000
y 0.000 4.919 0.000
z 0.000 0.000 4.061


<r2> (average value of r2) Å2
<r2> 30.506
(<r2>)1/2 5.523