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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: QCISD(T)=FULL/daug-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 QCISD(T)=FULL/daug-cc-pVTZ
 hartrees
Energy at 0K-152.301297
Energy at 298.15K 
HF Energy-151.646616
Nuclear repulsion energy61.387375
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 QCISD(T)=FULL/daug-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 3386 3386        
2 A1 1771 1771        
3 A1 1070 1070        
4 A1 877 877        
5 A2 598 598        
6 B1 511 511        
7 B2 3310 3310        
8 B2 956 956        
9 B2 135 135        

Unscaled Zero Point Vibrational Energy (zpe) 6307.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6307.3 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 QCISD(T)=FULL/daug-cc-pVTZ
ABC
1.11081 0.88341 0.49207

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/daug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.892
C2 0.000 0.636 -0.462
C3 0.000 -0.636 -0.462
H4 0.000 1.649 -0.799
H5 0.000 -1.649 -0.799

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.49601.49602.36162.3616
C21.49601.27131.06742.3089
C31.49601.27132.30891.0674
H42.36161.06742.30893.2972
H52.36162.30891.06743.2972

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.855 O1 C2 H4 133.531
O1 C3 C2 64.855 O1 C3 H5 133.531
C2 O1 C3 50.290 C2 C3 H5 161.615
C3 C2 H4 161.615
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability