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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: MP2=FULL/aug-cc-pVQZ

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-pVQZ
 hartrees
Energy at 0K-152.339154
Energy at 298.15K 
HF Energy-151.656135
Nuclear repulsion energy61.530114
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-pVQZ
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 3453 3303 3.14 100.81 0.16 0.27
2 A1 1790 1712 4.46 58.90 0.07 0.12
3 A1 1089 1041 10.55 6.00 0.38 0.55
4 A1 892 853 60.17 4.84 0.67 0.80
5 A2 674 645 0.00 2.63 0.75 0.86
6 B1 543 519 80.67 0.03 0.75 0.86
7 B2 3385 3238 58.75 15.35 0.75 0.86
8 B2 979 936 7.28 1.62 0.75 0.86
9 B2 183 175 1.14 16.14 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6493.6 cm-1
Scaled (by 0.9564) Zero Point Vibrational Energy (zpe) 6210.5 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-pVQZ
ABC
1.11766 0.88621 0.49428

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.891
C2 0.000 0.633 -0.462
C3 0.000 -0.633 -0.462
H4 0.000 1.646 -0.791
H5 0.000 -1.646 -0.791

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.49381.49382.35352.3535
C21.49381.26611.06542.3031
C31.49381.26612.30311.0654
H42.35351.06542.30313.2930
H52.35352.30311.06543.2930

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.925 O1 C2 H4 133.042
O1 C3 C2 64.925 O1 C3 H5 133.042
C2 O1 C3 50.150 C2 C3 H5 162.033
C3 C2 H4 162.033
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability