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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: MP3=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 MP3=FULL/Def2TZVPP
 hartrees
Energy at 0K-152.263514
Energy at 298.15K 
HF Energy-151.650963
Nuclear repulsion energy61.861754
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 MP3=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 3463 3463 3.17      
2 A1 1832 1832 2.83      
3 A1 1128 1128 13.02      
4 A1 924 924 52.42      
5 A2 676 676 0.00      
6 B1 560 560 87.03      
7 B2 3389 3389 50.36      
8 B2 992 992 6.65      
9 B2 404 404 0.91      

Unscaled Zero Point Vibrational Energy (zpe) 6684.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6684.1 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 MP3=FULL/Def2TZVPP
ABC
1.12350 0.90102 0.50002

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.884
C2 0.000 0.631 -0.458
C3 0.000 -0.631 -0.458
H4 0.000 1.643 -0.788
H5 0.000 -1.643 -0.788

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.48241.48242.34392.3439
C21.48241.26271.06402.2979
C31.48241.26272.29791.0640
H42.34391.06402.29793.2852
H52.34392.29791.06403.2852

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.793 O1 C2 H4 133.321
O1 C3 C2 64.793 O1 C3 H5 133.321
C2 O1 C3 50.414 C2 C3 H5 161.886
C3 C2 H4 161.886
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability