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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: CCD/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCD/6-311G**
 hartrees
Energy at 0K-152.104462
Energy at 298.15K 
HF Energy-151.621418
Nuclear repulsion energy61.492776
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 CCD/6-311G**
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 3441 3286 2.08      
2 A1 1809 1728 1.29      
3 A1 1124 1074 8.35      
4 A1 917 876 46.81      
5 A2 608 580 0.00      
6 B1 532 509 84.79      
7 B2 3369 3217 39.38      
8 B2 975 931 5.10      
9 B2 346 331 1.06      

Unscaled Zero Point Vibrational Energy (zpe) 6560.3 cm-1
Scaled (by 0.9551) Zero Point Vibrational Energy (zpe) 6265.7 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 CCD/6-311G**
ABC
1.10625 0.89351 0.49428

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-311G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.887
C2 0.000 0.636 -0.460
C3 0.000 -0.636 -0.460
H4 0.000 1.656 -0.788
H5 0.000 -1.656 -0.788

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.49001.49002.35562.3556
C21.49001.27211.07162.3156
C31.49001.27212.31561.0716
H42.35561.07162.31563.3126
H52.35562.31561.07163.3126

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.731 O1 C2 H4 133.068
O1 C3 C2 64.731 O1 C3 H5 133.068
C2 O1 C3 50.538 C2 C3 H5 162.201
C3 C2 H4 162.201
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability