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All results from a given calculation for C2H2O (Oxirene)

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

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/6-31+G**
 hartrees
Energy at 0K-152.060930
Energy at 298.15K 
HF Energy-151.592384
Nuclear repulsion energy60.930856
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/6-31+G**
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 3479 3267 3.02 102.28 0.20 0.33
2 A1 1791 1682 4.06 46.60 0.08 0.15
3 A1 1093 1026 8.40 6.94 0.54 0.70
4 A1 886 832 56.88 7.59 0.62 0.76
5 A2 533 501 0.00 3.58 0.75 0.86
6 B1 493 463 102.13 0.01 0.75 0.86
7 B2 3409 3202 53.12 17.33 0.75 0.86
8 B2 958 900 7.66 1.44 0.75 0.86
9 B2 42 40 0.97 20.20 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6341.6 cm-1
Scaled (by 0.9392) Zero Point Vibrational Energy (zpe) 5956.0 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/6-31+G**
ABC
1.09977 0.86561 0.48437

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.901
C2 0.000 0.639 -0.468
C3 0.000 -0.639 -0.468
H4 0.000 1.655 -0.799
H5 0.000 -1.655 -0.799

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.51101.51102.37342.3734
C21.51101.27831.06902.3184
C31.51101.27832.31841.0690
H42.37341.06902.31843.3107
H52.37342.31841.06903.3107

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.974 O1 C2 H4 133.105
O1 C3 C2 64.974 O1 C3 H5 133.105
C2 O1 C3 50.051 C2 C3 H5 161.921
C3 C2 H4 161.921
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability