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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-152.046371
Energy at 298.15K 
HF Energy-151.584901
Nuclear repulsion energy60.999465
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 3483 3254 2.36 99.14 0.19 0.32
2 A1 1801 1683 1.55 24.12 0.19 0.32
3 A1 1115 1042 3.50 4.69 0.27 0.42
4 A1 895 836 38.88 7.93 0.45 0.62
5 A2 514 480 0.00 0.22 0.75 0.86
6 B1 489 457 77.73 0.74 0.75 0.86
7 B2 3413 3189 41.82 16.86 0.75 0.86
8 B2 965 902 6.78 3.28 0.75 0.86
9 B2 14 13 0.86 13.27 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6344.4 cm-1
Scaled (by 0.9344) 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
1.10347 0.86666 0.48542

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 0.901
C2 0.000 0.638 -0.467
C3 0.000 -0.638 -0.467
H4 0.000 1.652 -0.803
H5 0.000 -1.652 -0.803

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.50921.50922.37372.3737
C21.50921.27641.06842.3149
C31.50921.27642.31491.0684
H42.37371.06842.31493.3042
H52.37372.31491.06843.3042

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.984 O1 C2 H4 133.386
O1 C3 C2 64.984 O1 C3 H5 133.386
C2 O1 C3 50.032 C2 C3 H5 161.630
C3 C2 H4 161.630
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability