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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: MP2=FULL/aug-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=FULL/aug-cc-pVTZ
 hartrees
Energy at 0K-152.258773
Energy at 298.15K 
HF Energy-151.646539
Nuclear repulsion energy61.429148
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=FULL/aug-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 3443 3276 3.34 100.93 0.16 0.27
2 A1 1780 1694 4.58 58.17 0.07 0.13
3 A1 1084 1031 10.39 6.27 0.38 0.55
4 A1 887 844 59.47 5.23 0.65 0.79
5 A2 657 625 0.00 2.78 0.75 0.86
6 B1 521 495 81.62 0.04 0.75 0.86
7 B2 3346 3183 57.89 15.84 0.75 0.86
8 B2 966 919 7.90 1.70 0.75 0.86
9 B2 149 141 1.12 16.16 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6415.8 cm-1
Scaled (by 0.9514) Zero Point Vibrational Energy (zpe) 6104.0 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=FULL/aug-cc-pVTZ
ABC
1.11582 0.88164 0.49250

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.893
C2 0.000 0.634 -0.463
C3 0.000 -0.634 -0.463
H4 0.000 1.644 -0.797
H5 0.000 -1.644 -0.797

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.49701.49702.35792.3579
C21.49701.26871.06382.3030
C31.49701.26872.30301.0638
H42.35791.06382.30303.2886
H52.35792.30301.06383.2886

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.928 O1 C2 H4 133.373
O1 C3 C2 64.928 O1 C3 H5 133.373
C2 O1 C3 50.144 C2 C3 H5 161.699
C3 C2 H4 161.699
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability