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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: MP2=FULL/6-31G

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/6-31G
 hartrees
Energy at 0K-151.829858
Energy at 298.15K 
HF Energy-151.504820
Nuclear repulsion energy58.554053
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/6-31G
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 3437 3265 3.31 101.53 0.17 0.30
2 A1 1716 1630 2.70 22.24 0.22 0.36
3 A1 1036 984 0.00 2.70 0.37 0.54
4 A1 828 787 29.45 8.76 0.38 0.55
5 A2 495 470 0.00 0.47 0.75 0.86
6 B1 529 503 115.35 0.84 0.75 0.86
7 B2 3369 3201 31.58 21.27 0.75 0.86
8 B2 959 911 10.91 1.29 0.75 0.86
9 B2 111 105 0.58 15.17 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6239.6 cm-1
Scaled (by 0.9501) Zero Point Vibrational Energy (zpe) 5928.3 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/6-31G
ABC
1.08001 0.75015 0.44268

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.968
C2 0.000 0.647 -0.502
C3 0.000 -0.647 -0.502
H4 0.000 1.659 -0.863
H5 0.000 -1.659 -0.863

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.60641.60642.47112.4711
C21.60641.29491.07422.3347
C31.60641.29492.33471.0742
H42.47111.07422.33473.3182
H52.47112.33471.07423.3182

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 66.231 O1 C2 H4 133.422
O1 C3 C2 66.231 O1 C3 H5 133.422
C2 O1 C3 47.539 C2 C3 H5 160.347
C3 C2 H4 160.347
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability