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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: CCD/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-152.057649
Energy at 298.15K 
HF Energy-151.593653
Nuclear repulsion energy61.291987
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/6-31+G**
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 3476 3276 2.79      
2 A1 1831 1725 2.90      
3 A1 1118 1053 14.23      
4 A1 910 858 52.25      
5 A2 545 514 0.00      
6 B1 508 479 96.88      
7 B2 3407 3210 41.35      
8 B2 977 920 6.86      
9 B2 362 341 0.07      

Unscaled Zero Point Vibrational Energy (zpe) 6566.8 cm-1
Scaled (by 0.9423) Zero Point Vibrational Energy (zpe) 6187.9 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/6-31+G**
ABC
1.10448 0.88296 0.49068

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.893
C2 0.000 0.637 -0.463
C3 0.000 -0.637 -0.463
H4 0.000 1.654 -0.794
H5 0.000 -1.654 -0.794

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.49761.49762.36222.3622
C21.49761.27461.06932.3152
C31.49761.27462.31521.0693
H42.36221.06932.31523.3082
H52.36222.31521.06933.3082

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.815 O1 C2 H4 133.221
O1 C3 C2 64.815 O1 C3 H5 133.221
C2 O1 C3 50.370 C2 C3 H5 161.964
C3 C2 H4 161.964
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability