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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: HSEh1PBE/6-311+G(3df,2p)

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/6-311+G(3df,2p)
 hartrees
Energy at 0K-152.366948
Energy at 298.15K 
HF Energy-152.366948
Nuclear repulsion energy61.951156
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/6-311+G(3df,2p)
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 3411 3411 3.21 81.19 0.19 0.32
2 A1 1848 1848 3.42 90.74 0.09 0.17
3 A1 1100 1100 18.48 7.47 0.66 0.80
4 A1 912 912 60.95 5.54 0.75 0.85
5 A2 687 687 0.00 6.04 0.75 0.86
6 B1 560 560 89.77 0.09 0.75 0.86
7 B2 3335 3335 55.82 15.12 0.75 0.86
8 B2 980 980 6.83 2.13 0.75 0.86
9 B2 216 216 3.73 15.82 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6524.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6524.5 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/6-311+G(3df,2p)
ABC
1.12483 0.90564 0.50170

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-311+G(3df,2p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.881
C2 0.000 0.630 -0.456
C3 0.000 -0.630 -0.456
H4 0.000 1.648 -0.786
H5 0.000 -1.648 -0.786

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.47851.47852.34472.3447
C21.47851.25911.07052.3013
C31.47851.25912.30131.0705
H42.34471.07052.30133.2960
H52.34472.30131.07053.2960

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.798 O1 C2 H4 133.157
O1 C3 C2 64.798 O1 C3 H5 133.157
C2 O1 C3 50.403 C2 C3 H5 162.045
C3 C2 H4 162.045
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.560      
2 C 0.067      
3 C 0.067      
4 H 0.213      
5 H 0.213      


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 -2.320 2.320
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.788 0.000 0.000
y 0.000 -11.658 0.000
z 0.000 0.000 -19.091
Traceless
 xyz
x -3.414 0.000 0.000
y 0.000 7.282 0.000
z 0.000 0.000 -3.868
Polar
3z2-r2-7.736
x2-y2-7.130
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.020 0.000 0.000
y 0.000 4.788 0.000
z 0.000 0.000 3.872


<r2> (average value of r2) Å2
<r2> 30.453
(<r2>)1/2 5.518