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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: MP2/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 MP2/daug-cc-pVTZ
 hartrees
Energy at 0K-152.211247
Energy at 298.15K 
HF Energy-151.645978
Nuclear repulsion energy61.198068
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 MP2/daug-cc-pVTZ
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 3424 3424 3.17 103.64 0.16 0.27
2 A1 1766 1766 4.60 60.44 0.06 0.11
3 A1 1081 1081 10.32 5.72 0.39 0.56
4 A1 882 882 59.06 4.85 0.68 0.81
5 A2 629 629 0.00 2.51 0.75 0.86
6 B1 517 517 80.95 0.02 0.75 0.86
7 B2 3353 3353 57.52 15.99 0.75 0.86
8 B2 965 965 7.73 1.60 0.75 0.86
9 B2 169 169 0.96 16.31 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6393.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6393.1 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 MP2/daug-cc-pVTZ
ABC
1.10709 0.87538 0.48885

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/daug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.896
C2 0.000 0.637 -0.465
C3 0.000 -0.637 -0.465
H4 0.000 1.652 -0.797
H5 0.000 -1.652 -0.797

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.50261.50262.36632.3663
C21.50261.27301.06902.3130
C31.50261.27302.31301.0690
H42.36631.06902.31303.3048
H52.36632.31301.06903.3048

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.937 O1 C2 H4 133.194
O1 C3 C2 64.937 O1 C3 H5 133.194
C2 O1 C3 50.125 C2 C3 H5 161.868
C3 C2 H4 161.868
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability