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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: HF/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 HF/6-311G**
 hartrees
Energy at 0K-151.623650
Energy at 298.15K 
HF Energy-151.623650
Nuclear repulsion energy62.636605
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 HF/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 3576 3248 2.13 59.12 0.22 0.36
2 A1 1978 1797 0.99 86.36 0.18 0.31
3 A1 1167 1061 13.74 7.08 0.61 0.76
4 A1 999 907 76.59 10.12 0.69 0.82
5 A2 821 746 0.00 9.17 0.75 0.86
6 B1 692 629 101.09 0.31 0.75 0.86
7 B2 3492 3172 60.84 13.97 0.75 0.86
8 B2 1096 996 3.82 2.13 0.75 0.86
9 B2 441 401 7.20 12.21 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7130.6 cm-1
Scaled (by 0.9085) Zero Point Vibrational Energy (zpe) 6478.1 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 HF/6-311G**
ABC
1.15074 0.92522 0.51287

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.872
C2 0.000 0.621 -0.453
C3 0.000 -0.621 -0.453
H4 0.000 1.634 -0.768
H5 0.000 -1.634 -0.768

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.46351.46352.31512.3151
C21.46351.24261.06092.2776
C31.46351.24262.27761.0609
H42.31511.06092.27763.2689
H52.31512.27761.06093.2689

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.878 O1 C2 H4 132.376
O1 C3 C2 64.878 O1 C3 H5 132.376
C2 O1 C3 50.245 C2 C3 H5 162.746
C3 C2 H4 162.746
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.423      
2 C 0.082      
3 C 0.082      
4 H 0.129      
5 H 0.129      


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 -2.700 2.700
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.495 0.000 0.000
y 0.000 -11.395 0.000
z 0.000 0.000 -18.844
Traceless
 xyz
x -3.376 0.000 0.000
y 0.000 7.275 0.000
z 0.000 0.000 -3.900
Polar
3z2-r2-7.799
x2-y2-7.101
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.786 0.000 0.000
y 0.000 4.393 0.000
z 0.000 0.000 2.844


<r2> (average value of r2) Å2
<r2> 29.846
(<r2>)1/2 5.463