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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: CCD/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 CCD/cc-pVDZ
 hartrees
Energy at 0K-152.052938
Energy at 298.15K 
HF Energy-151.592035
Nuclear repulsion energy60.993150
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/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 3427 3279 2.31      
2 A1 1807 1728 1.21      
3 A1 1110 1062 7.49      
4 A1 888 850 41.06      
5 A2 597 571 0.00      
6 B1 509 487 72.36      
7 B2 3358 3213 39.88      
8 B2 957 916 5.47      
9 B2 307 294 1.31      

Unscaled Zero Point Vibrational Energy (zpe) 6480.2 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 6199.6 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 CCD/cc-pVDZ
ABC
1.08515 0.88177 0.48647

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.893
C2 0.000 0.642 -0.462
C3 0.000 -0.642 -0.462
H4 0.000 1.671 -0.801
H5 0.000 -1.671 -0.801

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.49981.49982.37992.3799
C21.49981.28501.08302.3382
C31.49981.28502.33821.0830
H42.37991.08302.33823.3419
H52.37992.33821.08303.3419

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.634 O1 C2 H4 133.633
O1 C3 C2 64.634 O1 C3 H5 133.633
C2 O1 C3 50.731 C2 C3 H5 161.732
C3 C2 H4 161.732
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability