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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: MP2=FULL/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 MP2=FULL/6-311G**
 hartrees
Energy at 0K-152.151155
Energy at 298.15K 
HF Energy-151.620394
Nuclear repulsion energy61.164131
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/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 3452 3274 2.24 96.69 0.22 0.36
2 A1 1772 1681 1.84 30.57 0.17 0.28
3 A1 1100 1043 3.33 5.43 0.38 0.55
4 A1 896 850 47.96 6.93 0.49 0.65
5 A2 590 560 0.00 1.51 0.75 0.86
6 B1 513 487 88.05 0.55 0.75 0.86
7 B2 3381 3207 48.91 15.75 0.75 0.86
8 B2 957 907 5.61 2.03 0.75 0.86
9 B2 120i 114i 2.94 15.06 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6270.1 cm-1
Scaled (by 0.9486) Zero Point Vibrational Energy (zpe) 5947.8 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/6-311G**
ABC
1.10147 0.87795 0.48854

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-311G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.895
C2 0.000 0.638 -0.465
C3 0.000 -0.638 -0.465
H4 0.000 1.658 -0.791
H5 0.000 -1.658 -0.791

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.50201.50202.36462.3646
C21.50201.27581.07062.3186
C31.50201.27582.31861.0706
H42.36461.07062.31863.3151
H52.36462.31861.07063.3151

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.867 O1 C2 H4 132.888
O1 C3 C2 64.867 O1 C3 H5 132.888
C2 O1 C3 50.265 C2 C3 H5 162.245
C3 C2 H4 162.245
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability