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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: CCD/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCD/6-31G*
 hartrees
Energy at 0K-152.029962
Energy at 298.15K 
HF Energy-151.581325
Nuclear repulsion energy61.242552
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 CCD/6-31G*
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 3441 3257 1.77      
2 A1 1836 1738 0.92      
3 A1 1126 1066 6.54      
4 A1 907 859 42.35      
5 A2 503 476 0.00      
6 B1 502 475 82.19      
7 B2 3371 3191 29.91      
8 B2 964 912 6.75      
9 B2 354 335 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 6502.2 cm-1
Scaled (by 0.9465) Zero Point Vibrational Energy (zpe) 6154.4 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 CCD/6-31G*
ABC
1.10493 0.88006 0.48988

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.894
C2 0.000 0.636 -0.463
C3 0.000 -0.636 -0.463
H4 0.000 1.658 -0.796
H5 0.000 -1.658 -0.796

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.49901.49902.36812.3681
C21.49901.27241.07502.3186
C31.49901.27242.31861.0750
H42.36811.07502.31863.3166
H52.36812.31861.07503.3166

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.887 O1 C2 H4 133.168
O1 C3 C2 64.887 O1 C3 H5 133.168
C2 O1 C3 50.227 C2 C3 H5 161.945
C3 C2 H4 161.945
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability