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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: mPW1PW91/daug-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 mPW1PW91/daug-cc-pVTZ
 hartrees
Energy at 0K-152.491507
Energy at 298.15K 
HF Energy-152.491507
Nuclear repulsion energy61.898490
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 mPW1PW91/daug-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 3417 3417 3.22 82.40 0.18 0.31
2 A1 1849 1849 3.51 96.46 0.08 0.15
3 A1 1095 1095 18.02 5.89 0.71 0.83
4 A1 912 912 62.19 5.49 0.72 0.84
5 A2 688 688 0.00 5.31 0.75 0.86
6 B1 566 566 86.74 0.03 0.75 0.86
7 B2 3342 3342 55.08 15.03 0.75 0.86
8 B2 983 983 6.99 2.28 0.75 0.86
9 B2 211 211 3.13 15.79 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6531.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6531.6 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 mPW1PW91/daug-cc-pVTZ
ABC
1.12644 0.90115 0.50064

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/daug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.884
C2 0.000 0.629 -0.458
C3 0.000 -0.629 -0.458
H4 0.000 1.646 -0.788
H5 0.000 -1.646 -0.788

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.48151.48152.34612.3461
C21.48151.25861.06922.2992
C31.48151.25862.29921.0692
H42.34611.06922.29923.2922
H52.34612.29921.06923.2922

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.864 O1 C2 H4 133.138
O1 C3 C2 64.864 O1 C3 H5 133.138
C2 O1 C3 50.271 C2 C3 H5 161.998
C3 C2 H4 161.998
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.902      
2 C -0.367      
3 C -0.367      
4 H 0.818      
5 H 0.818      


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 -2.318 2.318
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.730 0.000 0.000
y 0.000 -11.687 0.000
z 0.000 0.000 -19.045
Traceless
 xyz
x -3.364 0.000 0.000
y 0.000 7.201 0.000
z 0.000 0.000 -3.837
Polar
3z2-r2-7.674
x2-y2-7.043
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.201 0.000 0.000
y 0.000 4.894 0.000
z 0.000 0.000 4.050


<r2> (average value of r2) Å2
<r2> 30.469
(<r2>)1/2 5.520