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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: MP4=FULL/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP4=FULL/Def2TZVPP
 hartrees
Energy at 0K-152.299610
Energy at 298.15K 
HF Energy-151.648288
Nuclear repulsion energy61.076994
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 MP4=FULL/Def2TZVPP
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 3409 3409        
2 A1 1744 1744        
3 A1 1067 1067        
4 A1 870 870        
5 A2 598 598        
6 B1 516 516        
7 B2 3338 3338        
8 B2 944 944        
9 B2 179i 179i        

Unscaled Zero Point Vibrational Energy (zpe) 6153.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6153.7 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 MP4=FULL/Def2TZVPP
ABC
1.10563 0.86944 0.48671

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.899
C2 0.000 0.637 -0.467
C3 0.000 -0.637 -0.467
H4 0.000 1.653 -0.797
H5 0.000 -1.653 -0.797

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.50741.50742.36842.3684
C21.50741.27421.06792.3135
C31.50741.27422.31351.0679
H42.36841.06792.31353.3053
H52.36842.31351.06793.3053

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.998 O1 C2 H4 133.024
O1 C3 C2 64.998 O1 C3 H5 133.024
C2 O1 C3 50.004 C2 C3 H5 161.978
C3 C2 H4 161.978
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability