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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: CCD/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 CCD/cc-pVTZ
 hartrees
Energy at 0K-152.199378
Energy at 298.15K 
HF Energy-151.643586
Nuclear repulsion energy61.704454
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/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 3438 3210 2.71      
2 A1 1825 1704 2.00      
3 A1 1123 1049 10.61      
4 A1 917 856 51.51      
5 A2 650 607 0.00      
6 B1 542 506 81.64      
7 B2 3363 3140 44.92      
8 B2 999 933 6.33      
9 B2 376 351 0.86      

Unscaled Zero Point Vibrational Energy (zpe) 6616.4 cm-1
Scaled (by 0.9337) Zero Point Vibrational Energy (zpe) 6177.7 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/cc-pVTZ
ABC
1.11830 0.89610 0.49747

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.886
C2 0.000 0.633 -0.459
C3 0.000 -0.633 -0.459
H4 0.000 1.647 -0.790
H5 0.000 -1.647 -0.790

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.48631.48632.35052.3505
C21.48631.26511.06772.3040
C31.48631.26512.30401.0677
H42.35051.06772.30403.2950
H52.35052.30401.06773.2950

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.811 O1 C2 H4 133.277
O1 C3 C2 64.811 O1 C3 H5 133.277
C2 O1 C3 50.378 C2 C3 H5 161.912
C3 C2 H4 161.912
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability