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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: MP2/LANL2DZ

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/LANL2DZ
 hartrees
Energy at 0K-151.841726
Energy at 298.15K 
HF Energy-151.527537
Nuclear repulsion energy58.136498
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/LANL2DZ
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 3426 3300 0.65 107.37 0.16 0.28
2 A1 1661 1600 5.37 26.44 0.19 0.32
3 A1 1023 986 0.40 4.79 0.35 0.52
4 A1 837 806 43.83 9.50 0.30 0.46
5 A2 622 599 0.00 3.25 0.75 0.86
6 B1 556 535 129.71 0.13 0.75 0.86
7 B2 3357 3233 31.01 21.70 0.75 0.86
8 B2 956 921 11.76 0.50 0.75 0.86
9 B2 165 159 1.03 20.17 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6301.5 cm-1
Scaled (by 0.9631) Zero Point Vibrational Energy (zpe) 6068.9 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/LANL2DZ
ABC
1.05414 0.74622 0.43692

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/LANL2DZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.971
C2 0.000 0.656 -0.505
C3 0.000 -0.656 -0.505
H4 0.000 1.675 -0.856
H5 0.000 -1.675 -0.856

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.61471.61472.47832.4783
C21.61471.31251.07772.3577
C31.61471.31252.35771.0777
H42.47831.07772.35773.3504
H52.47832.35771.07773.3504

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 66.020 O1 C2 H4 132.988
O1 C3 C2 66.020 O1 C3 H5 132.988
C2 O1 C3 47.959 C2 C3 H5 160.991
C3 C2 H4 160.991
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability