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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: CCSD/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCSD/6-311G**
 hartrees
Energy at 0K-152.109644
Energy at 298.15K 
HF Energy-151.620973
Nuclear repulsion energy61.337749
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 CCSD/6-311G**
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 3434 3434 2.10      
2 A1 1797 1797 1.20      
3 A1 1103 1103 5.60      
4 A1 903 903 46.92      
5 A2 579 579 0.00      
6 B1 525 525 83.25      
7 B2 3362 3362 41.46      
8 B2 964 964 5.10      
9 B2 217 217 2.72      

Unscaled Zero Point Vibrational Energy (zpe) 6441.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6441.9 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 CCSD/6-311G**
ABC
1.10389 0.88628 0.49159

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/6-311G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.891
C2 0.000 0.637 -0.462
C3 0.000 -0.637 -0.462
H4 0.000 1.658 -0.790
H5 0.000 -1.658 -0.790

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.49551.49552.36032.3603
C21.49551.27371.07192.3176
C31.49551.27372.31761.0719
H42.36031.07192.31763.3150
H52.36032.31761.07193.3150

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.796 O1 C2 H4 132.981
O1 C3 C2 64.796 O1 C3 H5 132.981
C2 O1 C3 50.407 C2 C3 H5 162.222
C3 C2 H4 162.222
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability