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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: PBEPBEultrafine/aug-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 PBEPBEultrafine/aug-cc-pVTZ
 hartrees
Energy at 0K-152.362153
Energy at 298.15K 
HF Energy-152.362153
Nuclear repulsion energy61.079886
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/aug-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 3317 3280 2.54 97.33 0.18 0.30
2 A1 1776 1756 3.39 91.20 0.09 0.17
3 A1 1041 1029 13.66 5.89 0.66 0.79
4 A1 861 852 58.51 5.98 0.74 0.85
5 A2 619 612 0.00 4.37 0.75 0.86
6 B1 517 511 82.60 0.04 0.75 0.86
7 B2 3245 3208 47.28 17.59 0.75 0.86
8 B2 923 913 8.11 2.91 0.75 0.86
9 B2 251i 248i 3.84 19.96 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6023.6 cm-1
Scaled (by 0.9888) Zero Point Vibrational Energy (zpe) 5956.2 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 PBEPBEultrafine/aug-cc-pVTZ
ABC
1.10486 0.87081 0.48699

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.899
C2 0.000 0.636 -0.465
C3 0.000 -0.636 -0.465
H4 0.000 1.660 -0.802
H5 0.000 -1.660 -0.802

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.50521.50522.37672.3767
C21.50521.27181.07782.3202
C31.50521.27182.32021.0778
H42.37671.07782.32023.3194
H52.37672.32021.07783.3194

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 65.009 O1 C2 H4 133.207
O1 C3 C2 65.009 O1 C3 H5 133.207
C2 O1 C3 49.983 C2 C3 H5 161.784
C3 C2 H4 161.784
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.411      
2 C -0.298      
3 C -0.298      
4 H 0.504      
5 H 0.504      


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 -2.270 2.270
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.982 0.000 0.000
y 0.000 -11.993 0.000
z 0.000 0.000 -19.205
Traceless
 xyz
x -3.383 0.000 0.000
y 0.000 7.101 0.000
z 0.000 0.000 -3.717
Polar
3z2-r2-7.434
x2-y2-6.989
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.309 0.000 0.000
y 0.000 5.102 0.000
z 0.000 0.000 4.253


<r2> (average value of r2) Å2
<r2> 31.159
(<r2>)1/2 5.582