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: PBEPBE/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at PBEPBE/STO-3G
 hartrees
Energy at 0K-186.908831
Energy at 298.15K-186.911612
Nuclear repulsion energy70.486720
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 PBEPBE/STO-3G
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 3171 2897 0.03      
2 A1 1601 1463 0.55      
3 A1 1364 1247 0.90      
4 A1 1026 937 0.63      
5 A2 947 865 0.00      
6 B1 3313 3026 10.23      
7 B1 1110 1014 4.98      
8 B2 1157 1057 8.09      
9 B2 946 865 1.36      

Unscaled Zero Point Vibrational Energy (zpe) 7317.2 cm-1
Scaled (by 0.9136) Zero Point Vibrational Energy (zpe) 6685.0 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 PBEPBE/STO-3G
ABC
0.84690 0.82878 0.45978

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.795
H2 0.943 0.000 1.401
H3 -0.943 0.000 1.401
O4 0.000 0.753 -0.473
O5 0.000 -0.753 -0.473

Atom - Atom Distances (Å)
  C1 H2 H3 O4 O5
C11.12061.12061.47501.4750
H21.12061.88502.22932.2293
H31.12061.88502.22932.2293
O41.47502.22932.22931.5050
O51.47502.22932.22931.5050

picture of Dioxirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O4 O5 59.326 C1 O5 O4 59.326
H2 C1 H3 114.500 H2 C1 O4 117.729
H2 C1 O5 117.729 H3 C1 O4 117.729
H3 C1 O5 117.729 O4 C1 O5 61.349
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.024      
2 H 0.095      
3 H 0.095      
4 O -0.083      
5 O -0.083      


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 1.503 1.503
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.948 0.000 0.000
y 0.000 -15.997 0.000
z 0.000 0.000 -14.222
Traceless
 xyz
x 0.161 0.000 0.000
y 0.000 -1.412 0.000
z 0.000 0.000 1.251
Polar
3z2-r22.501
x2-y21.049
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.901 0.000 0.000
y 0.000 1.258 0.000
z 0.000 0.000 1.909


<r2> (average value of r2) Å2
<r2> 31.549
(<r2>)1/2 5.617