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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: PBEPBEultrafine/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at PBEPBEultrafine/6-311G*
 hartrees
Energy at 0K-152.330742
Energy at 298.15K 
HF Energy-152.330742
Nuclear repulsion energy60.873791
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 PBEPBEultrafine/6-311G*
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 3315 3280 0.70 93.19 0.22 0.36
2 A1 1780 1761 0.95 56.66 0.20 0.33
3 A1 1042 1031 6.06 6.37 0.50 0.67
4 A1 845 836 51.53 6.45 0.60 0.75
5 A2 475 470 0.00 2.59 0.75 0.86
6 B1 464 459 90.94 0.68 0.75 0.86
7 B2 3241 3208 28.29 19.30 0.75 0.86
8 B2 879 869 6.77 3.05 0.75 0.86
9 B2 386i 382i 5.86 15.37 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5827.6 cm-1
Scaled (by 0.9896) Zero Point Vibrational Energy (zpe) 5767.0 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 PBEPBEultrafine/6-311G*
ABC
1.10013 0.86277 0.48355

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.903
C2 0.000 0.637 -0.468
C3 0.000 -0.637 -0.468
H4 0.000 1.665 -0.803
H5 0.000 -1.665 -0.803

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.51191.51192.38312.3831
C21.51191.27401.08062.3257
C31.51191.27402.32571.0806
H42.38311.08062.32573.3291
H52.38312.32571.08063.3291

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 65.081 O1 C2 H4 132.942
O1 C3 C2 65.081 O1 C3 H5 132.942
C2 O1 C3 49.838 C2 C3 H5 161.977
C3 C2 H4 161.977
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.340      
2 C -0.059      
3 C -0.059      
4 H 0.229      
5 H 0.229      


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 -2.426 2.426
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.524 0.000 0.000
y 0.000 -11.591 0.000
z 0.000 0.000 -18.545
Traceless
 xyz
x -3.456 0.000 0.000
y 0.000 6.943 0.000
z 0.000 0.000 -3.487
Polar
3z2-r2-6.975
x2-y2-6.933
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.835 0.000 0.000
y 0.000 4.486 0.000
z 0.000 0.000 3.048


<r2> (average value of r2) Å2
<r2> 30.982
(<r2>)1/2 5.566