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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: CID/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 CID/6-31G*
 hartrees
Energy at 0K-151.983186
Energy at 298.15K 
HF Energy-151.582893
Nuclear repulsion energy61.714109
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 CID/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 3518 3249 2.03      
2 A1 1910 1764 0.73      
3 A1 1150 1062 9.10      
4 A1 942 870 47.56      
5 A2 609 562 0.00      
6 B1 572 528 86.41      
7 B2 3443 3180 39.36      
8 B2 1002 926 6.11      
9 B2 372 343 0.79      

Unscaled Zero Point Vibrational Energy (zpe) 6757.9 cm-1
Scaled (by 0.9237) Zero Point Vibrational Energy (zpe) 6242.3 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 CID/6-31G*
ABC
1.12215 0.89371 0.49749

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.887
C2 0.000 0.631 -0.460
C3 0.000 -0.631 -0.460
H4 0.000 1.649 -0.788
H5 0.000 -1.649 -0.788

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.48761.48762.35012.3501
C21.48761.26121.06952.3027
C31.48761.26122.30271.0695
H42.35011.06952.30273.2974
H52.35012.30271.06953.2974

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.918 O1 C2 H4 132.912
O1 C3 C2 64.918 O1 C3 H5 132.912
C2 O1 C3 50.164 C2 C3 H5 162.170
C3 C2 H4 162.170
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability