return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH2O2 (Dioxirane)

using model chemistry: MP4/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP4/3-21G
 hartrees
Energy at 0K-187.928624
Energy at 298.15K-187.931374
HF Energy-187.542507
Nuclear repulsion energy68.861504
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 MP4/3-21G
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 3099 3005        
2 A1 1604 1555        
3 A1 1103 1070        
4 A1 711 690        
5 A2 965 936        
6 B1 3198 3101        
7 B1 1155 1120        
8 B2 1224 1187        
9 B2 782 759        

Unscaled Zero Point Vibrational Energy (zpe) 6920.1 cm-1
Scaled (by 0.9698) Zero Point Vibrational Energy (zpe) 6711.1 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 MP4/3-21G
ABC
0.87024 0.73459 0.43391

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.780
H2 0.928 0.000 1.351
H3 -0.928 0.000 1.351
O4 0.000 0.814 -0.461
O5 0.000 -0.814 -0.461

Atom - Atom Distances (Å)
  C1 H2 H3 O4 O5
C11.08921.08921.48481.4848
H21.08921.85542.19282.1928
H31.08921.85542.19282.1928
O41.48482.19282.19281.6287
O51.48482.19282.19281.6287

picture of Dioxirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O4 O5 56.739 C1 O5 O4 56.739
H2 C1 H3 116.794 H2 C1 O4 115.988
H2 C1 O5 115.988 H3 C1 O4 115.988
H3 C1 O5 115.988 O4 C1 O5 66.522
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability