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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: CCD/TZVP

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/TZVP
 hartrees
Energy at 0K-152.121279
Energy at 298.15K 
HF Energy-151.638495
Nuclear repulsion energy61.596344
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/TZVP
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 3456 3276 2.48      
2 A1 1832 1737 2.75      
3 A1 1121 1063 9.81      
4 A1 916 868 51.03      
5 A2 557 528 0.00      
6 B1 523 496 89.75      
7 B2 3385 3209 42.24      
8 B2 995 944 6.19      
9 B2 353 335 0.40      

Unscaled Zero Point Vibrational Energy (zpe) 6569.3 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 6227.7 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/TZVP
ABC
1.11750 0.89041 0.49556

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.889
C2 0.000 0.633 -0.460
C3 0.000 -0.633 -0.460
H4 0.000 1.648 -0.794
H5 0.000 -1.648 -0.794

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.49021.49022.35522.3552
C21.49021.26571.06852.3050
C31.49021.26572.30501.0685
H42.35521.06852.30503.2958
H52.35522.30501.06853.2958

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.870 O1 C2 H4 133.325
O1 C3 C2 64.870 O1 C3 H5 133.325
C2 O1 C3 50.261 C2 C3 H5 161.805
C3 C2 H4 161.805
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability