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 H2OH2O (water dimer)

using model chemistry: HF/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/6-311G*
 hartrees
Energy at 0K-152.075105
Energy at 298.15K 
HF Energy-152.075105
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy36.919025
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 HF/6-311G*
Rotational Constants (cm-1) from geometry optimized at HF/6-311G*
See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.019 0.584 0.000
O2 -0.005 1.527 0.000
O3 -0.005 -1.388 0.000
H4 0.883 1.831 0.000
H5 -0.410 -1.763 0.761
H6 -0.410 -1.763 -0.761

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.94351.97181.51702.50382.5038
O20.94352.91480.93883.40063.4006
O31.97182.91483.33900.93990.9399
H41.51700.93883.33903.89423.8942
H52.50383.40060.93993.89421.5216
H62.50383.40060.93993.89421.5216

picture of water dimer state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 O2 H4 107.398 H1 O3 H5 113.830
H1 O3 H6 113.830 O2 H1 O3 177.801
H5 O3 H6 108.074
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.485      
2 O -0.925      
3 O -0.882      
4 H 0.418      
5 H 0.452      
6 H 0.452      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.145 -3.396 0.000 3.399
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.562 6.883 0.000
y 6.883 -11.109 0.000
z 0.000 0.000 -11.243
Traceless
 xyz
x -0.386 6.883 0.000
y 6.883 0.293 0.000
z 0.000 0.000 0.093
Polar
3z2-r20.185
x2-y2-0.453
xy6.883
xz0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 53.305
(<r2>)1/2 7.301