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: TPSSh/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at TPSSh/cc-pVTZ
 hartrees
Energy at 0K-189.701428
Energy at 298.15K-189.704300
HF Energy-189.701428
Nuclear repulsion energy73.300404
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 TPSSh/cc-pVTZ
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 3049 2953 37.98      
2 A1 1551 1502 3.79      
3 A1 1308 1267 44.95      
4 A1 836 809 1.82      
5 A2 1022 990 0.00      
6 B1 3144 3044 34.51      
7 B1 1176 1138 7.94      
8 B2 1254 1214 3.29      
9 B2 914 885 22.15      

Unscaled Zero Point Vibrational Energy (zpe) 7127.2 cm-1
Scaled (by 0.9683) Zero Point Vibrational Energy (zpe) 6901.3 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 TPSSh/cc-pVTZ
ABC
0.95912 0.85579 0.49869

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.729
H2 0.926 0.000 1.305
H3 -0.926 0.000 1.305
O4 0.000 0.741 -0.437
O5 0.000 -0.741 -0.437

Atom - Atom Distances (Å)
  C1 H2 H3 O4 O5
C11.09051.09051.38101.3810
H21.09051.85182.10692.1069
H31.09051.85182.10692.1069
O41.38102.10692.10691.4812
O51.38102.10692.10691.4812

picture of Dioxirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O4 O5 57.569 C1 O5 O4 57.569
H2 C1 H3 116.230 H2 C1 O4 116.477
H2 C1 O5 116.477 H3 C1 O4 116.477
H3 C1 O5 116.477 O4 C1 O5 64.862
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.181      
2 H 0.067      
3 H 0.067      
4 O -0.157      
5 O -0.157      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 2.458 2.458
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.367 0.000 0.000
y 0.000 2.875 0.000
z 0.000 0.000 3.204


<r2> (average value of r2) Å2
<r2> 30.715
(<r2>)1/2 5.542