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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: BLYP/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 BLYP/6-311G*
 hartrees
Energy at 0K-152.472374
Energy at 298.15K 
HF Energy-152.472374
Nuclear repulsion energy60.459576
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 BLYP/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 3299 3291 0.58 98.35 0.22 0.37
2 A1 1765 1761 1.14 55.70 0.20 0.33
3 A1 1008 1006 2.18 5.05 0.48 0.65
4 A1 825 823 49.66 8.29 0.55 0.71
5 A2 480 478 0.00 2.28 0.75 0.86
6 B1 471 470 88.65 0.73 0.75 0.86
7 B2 3228 3219 23.76 22.09 0.75 0.86
8 B2 877 875 8.04 3.36 0.75 0.86
9 B2 405i 404i 4.17 14.18 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5773.9 cm-1
Scaled (by 0.9975) Zero Point Vibrational Energy (zpe) 5759.5 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 BLYP/6-311G*
ABC
1.10312 0.83683 0.47585

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.917
C2 0.000 0.636 -0.475
C3 0.000 -0.636 -0.475
H4 0.000 1.661 -0.814
H5 0.000 -1.661 -0.814

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.53091.53092.39892.3989
C21.53091.27291.07892.3221
C31.53091.27292.32211.0789
H42.39891.07892.32213.3215
H52.39892.32211.07893.3215

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 65.433 O1 C2 H4 132.870
O1 C3 C2 65.433 O1 C3 H5 132.870
C2 O1 C3 49.134 C2 C3 H5 161.697
C3 C2 H4 161.697
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.353      
2 C -0.047      
3 C -0.047      
4 H 0.223      
5 H 0.223      


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 -2.516 2.516
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.551 0.000 0.000
y 0.000 -11.794 0.000
z 0.000 0.000 -18.596
Traceless
 xyz
x -3.356 0.000 0.000
y 0.000 6.780 0.000
z 0.000 0.000 -3.423
Polar
3z2-r2-6.847
x2-y2-6.757
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.822 0.000 0.000
y 0.000 4.493 0.000
z 0.000 0.000 3.128


<r2> (average value of r2) Å2
<r2> 31.330
(<r2>)1/2 5.597