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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: CCSD/daug-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 CCSD/daug-cc-pVTZ
 hartrees
Energy at 0K-152.218395
Energy at 298.15K 
HF Energy-151.647364
Nuclear repulsion energy61.574548
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/daug-cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at CCSD/daug-cc-pVTZ
ABC
1.11487 0.89123 0.49529

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.888
C2 0.000 0.634 -0.461
C3 0.000 -0.634 -0.461
H4 0.000 1.650 -0.790
H5 0.000 -1.650 -0.790

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.49041.49042.35362.3536
C21.49041.26711.06852.3072
C31.49041.26712.30721.0685
H42.35361.06852.30723.3001
H52.35362.30721.06853.3001

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.844 O1 C2 H4 133.106
O1 C3 C2 64.844 O1 C3 H5 133.106
C2 O1 C3 50.312 C2 C3 H5 162.050
C3 C2 H4 162.050
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability