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 K2O2 (dipotassium dioxide)

using model chemistry: HSEh1PBE/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1AG
Energy calculated at HSEh1PBE/3-21G
 hartrees
Energy at 0K-1342.894652
Energy at 298.15K 
HF Energy-1342.894652
Nuclear repulsion energy193.417136
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 HSEh1PBE/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 ?a 135 130 16.51 0.00 0.68 0.81
2 ?a 46 45 21.91 0.00 0.29 0.45
3 Ag 906 873 0.00 95554.59 0.70 0.82
4 Ag 190 183 0.00 2620.02 0.60 0.75
5 B1u 363 350 195.10 0.00 0.24 0.38
6 B3g 369 356 0.00 2006.22 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 1004.8 cm-1
Scaled (by 0.9633) Zero Point Vibrational Energy (zpe) 967.9 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 HSEh1PBE/3-21G
ABC
0.93864 0.03904 0.03748

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/3-21G

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
K1 0.000 0.000 2.354
K2 0.000 0.000 -2.354
O3 0.000 0.749 0.000
O4 0.000 -0.749 0.000

Atom - Atom Distances (Å)
  K1 K2 O3 O4
K14.70802.47042.4704
K24.70802.47042.4704
O32.47042.47041.4986
O42.47042.47041.4986

picture of dipotassium dioxide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
K1 O3 K2 144.687 K1 O4 K2 144.687
O3 K1 O4 35.313 O3 K2 O4 35.313
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 K 0.476      
2 K 0.476      
3 O -0.476      
4 O -0.476      


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 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -41.202 0.087 0.000
y 0.087 -45.426 0.000
z 0.000 0.000 -25.560
Traceless
 xyz
x -5.709 0.087 0.000
y 0.087 -12.045 0.000
z 0.000 0.000 17.754
Polar
3z2-r235.508
x2-y24.224
xy0.087
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 31.108 0.750 0.000
y 0.750 36.501 0.000
z 0.000 0.000 295.169


<r2> (average value of r2) Å2
<r2> 242.906
(<r2>)1/2 15.585