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: CCD/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 CCD/3-21G
 hartrees
Energy at 0K-187.906017
Energy at 298.15K-187.908831
HF Energy-187.547333
Nuclear repulsion energy69.802178
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 CCD/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 3132 3045 7.01      
2 A1 1610 1565 1.15      
3 A1 1179 1146 2.29      
4 A1 785 763 0.68      
5 A2 1005 977 0.00      
6 B1 3230 3141 30.83      
7 B1 1166 1134 6.19      
8 B2 1249 1214 2.32      
9 B2 828 805 7.22      

Unscaled Zero Point Vibrational Energy (zpe) 7091.4 cm-1
Scaled (by 0.9723) Zero Point Vibrational Energy (zpe) 6895.0 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 CCD/3-21G
ABC
0.87801 0.76907 0.44766

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.777
H2 0.927 0.000 1.344
H3 -0.927 0.000 1.344
O4 0.000 0.794 -0.459
O5 0.000 -0.794 -0.459

Atom - Atom Distances (Å)
  C1 H2 H3 O4 O5
C11.08671.08671.46901.4690
H21.08671.85352.17762.1776
H31.08671.85352.17762.1776
O41.46902.17762.17761.5888
O51.46902.17762.17761.5888

picture of Dioxirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O4 O5 57.264 C1 O5 O4 57.264
H2 C1 H3 117.032 H2 C1 O4 116.060
H2 C1 O5 116.060 H3 C1 O4 116.060
H3 C1 O5 116.060 O4 C1 O5 65.472
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability