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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: HSEh1PBE/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 HSEh1PBE/6-311G**
 hartrees
Energy at 0K-152.346706
Energy at 298.15K 
HF Energy-152.346706
Nuclear repulsion energy61.720091
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/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 3422 3286 2.18 80.29 0.21 0.35
2 A1 1849 1776 0.88 62.30 0.19 0.32
3 A1 1096 1053 9.70 6.98 0.53 0.69
4 A1 909 873 56.64 6.72 0.65 0.79
5 A2 652 626 0.00 3.99 0.75 0.86
6 B1 552 530 92.23 0.52 0.75 0.86
7 B2 3345 3212 51.20 16.00 0.75 0.86
8 B2 966 927 5.72 2.46 0.75 0.86
9 B2 62i 60i 6.82 14.44 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6363.8 cm-1
Scaled (by 0.9604) Zero Point Vibrational Energy (zpe) 6111.8 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/6-311G**
ABC
1.12058 0.89540 0.49771

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-311G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.886
C2 0.000 0.631 -0.460
C3 0.000 -0.631 -0.460
H4 0.000 1.650 -0.788
H5 0.000 -1.650 -0.788

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.48641.48642.35092.3509
C21.48641.26181.07112.3048
C31.48641.26182.30481.0711
H42.35091.07112.30483.3009
H52.35092.30481.07113.3009

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.884 O1 C2 H4 132.960
O1 C3 C2 64.884 O1 C3 H5 132.960
C2 O1 C3 50.231 C2 C3 H5 162.155
C3 C2 H4 162.155
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.358      
2 C 0.048      
3 C 0.048      
4 H 0.131      
5 H 0.131      


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 -2.463 2.463
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.378 0.000 0.000
y 0.000 -11.514 0.000
z 0.000 0.000 -18.548
Traceless
 xyz
x -3.347 0.000 0.000
y 0.000 6.949 0.000
z 0.000 0.000 -3.603
Polar
3z2-r2-7.205
x2-y2-6.864
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.834 0.000 0.000
y 0.000 4.436 0.000
z 0.000 0.000 2.961


<r2> (average value of r2) Å2
<r2> 30.369
(<r2>)1/2 5.511