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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: B97D3/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 B97D3/STO-3G
 hartrees
Energy at 0K-150.421633
Energy at 298.15K 
HF Energy-150.421633
Nuclear repulsion energy59.238776
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 B97D3/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 3492 3492 11.19 56.94 0.21 0.35
2 A1 1832 1832 0.03 23.35 0.20 0.34
3 A1 1199 1199 0.08 2.69 0.26 0.41
4 A1 907 907 1.94 8.24 0.70 0.82
5 A2 661 661 0.00 0.22 0.75 0.86
6 B1 535 535 47.77 0.81 0.75 0.86
7 B2 3396 3396 104.51 19.36 0.75 0.86
8 B2 942 942 11.91 3.81 0.75 0.86
9 B2 101 101 4.20 10.78 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6531.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6531.7 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 B97D3/STO-3G
ABC
1.07023 0.79591 0.45645

See section I.F.4 to change rotational constant units
Geometric Data calculated at B97D3/STO-3G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.941
C2 0.000 0.652 -0.475
C3 0.000 -0.652 -0.475
H4 0.000 1.659 -0.917
H5 0.000 -1.659 -0.917

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.55841.55842.49032.4903
C21.55841.30431.09922.3526
C31.55841.30432.35261.0992
H42.49031.09922.35263.3170
H52.49032.35261.09923.3170

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 65.263 O1 C2 H4 138.457
O1 C3 C2 65.263 O1 C3 H5 138.457
C2 O1 C3 49.475 C2 C3 H5 156.280
C3 C2 H4 156.280
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B97D3/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.145      
2 C -0.042      
3 C -0.042      
4 H 0.114      
5 H 0.114      


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 -1.517 1.517
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.319 0.000 0.000
y 0.000 -12.165 0.000
z 0.000 0.000 -16.111
Traceless
 xyz
x -2.181 0.000 0.000
y 0.000 4.050 0.000
z 0.000 0.000 -1.869
Polar
3z2-r2-3.738
x2-y2-4.154
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.467 0.000 0.000
y 0.000 2.842 0.000
z 0.000 0.000 1.629


<r2> (average value of r2) Å2
<r2> 31.355
(<r2>)1/2 5.600