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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-151.836872
Energy at 298.15K 
HF Energy-151.506421
Nuclear repulsion energy59.014181
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 3406 3268 3.08      
2 A1 1746 1675 1.29      
3 A1 1019 978 0.02      
4 A1 830 796 25.92      
5 A2 538 516 0.00      
6 B1 545 523 106.47      
7 B2 3337 3202 22.55      
8 B2 959 920 12.31      
9 B2 366 351 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 6372.2 cm-1
Scaled (by 0.9595) Zero Point Vibrational Energy (zpe) 6114.1 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 CCD/6-31G
ABC
1.08324 0.77228 0.45085

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 0.954
C2 0.000 0.646 -0.494
C3 0.000 -0.646 -0.494
H4 0.000 1.660 -0.854
H5 0.000 -1.660 -0.854

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.58581.58582.45522.4552
C21.58581.29141.07672.3340
C31.58581.29142.33401.0767
H42.45521.07672.33403.3206
H52.45522.33401.07673.3206

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 65.972 O1 C2 H4 133.582
O1 C3 C2 65.972 O1 C3 H5 133.582
C2 O1 C3 48.055 C2 C3 H5 160.446
C3 C2 H4 160.446
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability