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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: MP2/daug-cc-pVDZ

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/daug-cc-pVDZ
 hartrees
Energy at 0K-152.079728
Energy at 298.15K 
HF Energy-151.604457
Nuclear repulsion energy60.362216
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/daug-cc-pVDZ
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 3423 3423 2.86 110.34 0.16 0.28
2 A1 1748 1748 4.99 59.65 0.06 0.11
3 A1 1056 1056 10.30 5.94 0.39 0.56
4 A1 858 858 57.25 5.14 0.66 0.79
5 A2 558 558 0.00 2.36 0.75 0.86
6 B1 495 495 83.58 0.01 0.75 0.86
7 B2 3356 3356 53.94 17.63 0.75 0.86
8 B2 939 939 8.08 1.69 0.75 0.86
9 B2 57i 57i 0.62 16.94 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6187.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6187.6 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/daug-cc-pVDZ
ABC
1.07788 0.85073 0.47547

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/daug-cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.909
C2 0.000 0.646 -0.471
C3 0.000 -0.646 -0.471
H4 0.000 1.672 -0.809
H5 0.000 -1.672 -0.809

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.52421.52422.39712.3971
C21.52421.29151.08002.3418
C31.52421.29152.34181.0800
H42.39711.08002.34183.3433
H52.39712.34181.08003.3433

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.935 O1 C2 H4 133.268
O1 C3 C2 64.935 O1 C3 H5 133.268
C2 O1 C3 50.130 C2 C3 H5 161.796
C3 C2 H4 161.796
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability