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: MP2/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/CEP-121G
 hartrees
Energy at 0K-38.160316
Energy at 298.15K-38.163092
HF Energy-37.795724
Nuclear repulsion energy38.720060
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 MP2/CEP-121G
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 3082 3008 18.86      
2 A1 1534 1497 0.35      
3 A1 1120 1093 11.72      
4 A1 684 667 0.61      
5 A2 975 952 0.00      
6 B1 3224 3146 29.07      
7 B1 1135 1108 6.60      
8 B2 1260 1230 1.49      
9 B2 866 845 37.71      

Unscaled Zero Point Vibrational Energy (zpe) 6939.4 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 6772.9 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 MP2/CEP-121G
ABC
0.87992 0.72296 0.43322

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.777
H2 0.940 0.000 1.333
H3 -0.940 0.000 1.333
O4 0.000 0.820 -0.458
O5 0.000 -0.820 -0.458

Atom - Atom Distances (Å)
  C1 H2 H3 O4 O5
C11.09211.09211.48251.4825
H21.09211.88042.18242.1824
H31.09211.88042.18242.1824
O41.48252.18242.18241.6410
O51.48252.18242.18241.6410

picture of Dioxirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O4 O5 56.395 C1 O5 O4 56.395
H2 C1 H3 118.829 H2 C1 O4 115.074
H2 C1 O5 115.074 H3 C1 O4 115.074
H3 C1 O5 115.074 O4 C1 O5 67.209
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability