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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: B2PLYP=FULL/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B2PLYP=FULL/cc-pVTZ
 hartrees
Energy at 0K-152.425750
Energy at 298.15K 
HF Energy-152.230427
Nuclear repulsion energy61.406164
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 B2PLYP=FULL/cc-pVTZ
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 3424 3273 2.68 90.76 0.20 0.34
2 A1 1808 1728 2.27 58.71 0.15 0.27
3 A1 1069 1022 4.06 5.39 0.36 0.53
4 A1 884 845 54.87 7.90 0.59 0.75
5 A2 641 613 0.00 3.26 0.75 0.86
6 B1 542 518 84.12 0.30 0.75 0.86
7 B2 3348 3200 49.75 18.06 0.75 0.86
8 B2 971 929 7.46 2.44 0.75 0.86
9 B2 190i 181i 4.12 13.48 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6249.3 cm-1
Scaled (by 0.9558) Zero Point Vibrational Energy (zpe) 5973.1 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 B2PLYP=FULL/cc-pVTZ
ABC
1.12267 0.87512 0.49178

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.897
C2 0.000 0.631 -0.465
C3 0.000 -0.631 -0.465
H4 0.000 1.644 -0.798
H5 0.000 -1.644 -0.798

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.50051.50052.36122.3612
C21.50051.26281.06612.2997
C31.50051.26282.29971.0661
H42.36121.06612.29973.2880
H52.36122.29971.06613.2880

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 65.116 O1 C2 H4 133.117
O1 C3 C2 65.116 O1 C3 H5 133.117
C2 O1 C3 49.769 C2 C3 H5 161.767
C3 C2 H4 161.767
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability