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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: MP2/aug-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/aug-cc-pVDZ
 hartrees
Energy at 0K-152.077394
Energy at 298.15K 
HF Energy-151.603779
Nuclear repulsion energy60.350490
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/aug-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 3425 3284 2.94 109.69 0.16 0.28
2 A1 1750 1678 5.03 57.05 0.07 0.14
3 A1 1057 1013 9.69 6.93 0.36 0.53
4 A1 858 823 57.67 6.09 0.61 0.76
5 A2 524 503 0.00 2.64 0.75 0.86
6 B1 476 457 85.28 0.05 0.75 0.86
7 B2 3358 3220 53.38 17.49 0.75 0.86
8 B2 934 896 8.69 1.64 0.75 0.86
9 B2 68i 65i 0.65 17.01 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6157.4 cm-1
Scaled (by 0.959) Zero Point Vibrational Energy (zpe) 5904.9 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/aug-cc-pVDZ
ABC
1.07791 0.85012 0.47528

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.910
C2 0.000 0.646 -0.471
C3 0.000 -0.646 -0.471
H4 0.000 1.672 -0.811
H5 0.000 -1.672 -0.811

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.52441.52442.39922.3992
C21.52441.29131.08112.3424
C31.52441.29132.34241.0811
H42.39921.08112.34243.3439
H52.39922.34241.08113.3439

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.942 O1 C2 H4 133.374
O1 C3 C2 64.942 O1 C3 H5 133.374
C2 O1 C3 50.117 C2 C3 H5 161.685
C3 C2 H4 161.685
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability