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All results from a given calculation for H2OH2O (water dimer)

using model chemistry: PBEPBE/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBEPBE/6-31G**
 hartrees
Energy at 0K-152.679961
Energy at 298.15K 
HF Energy-152.679961
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy37.034697
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/6-31G**
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' 3782 3730 32.36      
2 A' 3689 3639 6.49      
3 A' 3543 3494 281.85      
4 A' 1662 1639 72.12      
5 A' 1632 1610 44.26      
6 A' 482 475 18.21      
7 A' 240 237 185.34      
8 A' 127 125 249.78      
9 A" 3798 3746 39.05      
10 A" 693 683 85.99      
11 A" 188 186 197.30      
12 A" 118i 117i 20.34      

Unscaled Zero Point Vibrational Energy (zpe) 9858.2 cm-1
Scaled (by 0.9863) Zero Point Vibrational Energy (zpe) 9723.2 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/6-31G**
ABC
6.60179 0.22882 0.22818

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.057 0.542 0.000
O2 0.008 1.519 0.000
O3 0.008 -1.407 0.000
H4 0.942 1.788 0.000
H5 -0.567 -1.613 0.760
H6 -0.567 -1.613 -0.760

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.97841.94941.52852.36852.3685
O20.97842.92610.97133.27413.2741
O31.94942.92613.32840.97520.9752
H41.52850.97133.32843.79753.7975
H52.36853.27410.97523.79751.5195
H62.36853.27410.97523.79751.5195

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 103.248 H1 O3 H5 103.057
H1 O3 H6 103.057 O2 H1 O3 175.775
H5 O3 H6 102.354
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.284      
2 O -0.650      
3 O -0.568      
4 H 0.290      
5 H 0.322      
6 H 0.322      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.303 -1.406 0.000 1.438
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -10.830 5.887 0.000
y 5.887 -14.540 0.000
z 0.000 0.000 -11.464
Traceless
 xyz
x 2.171 5.887 0.000
y 5.887 -3.393 0.000
z 0.000 0.000 1.222
Polar
3z2-r22.444
x2-y23.710
xy5.887
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.752 0.307 0.000
y 0.307 2.182 0.000
z 0.000 0.000 1.530


<r2> (average value of r2) Å2
<r2> 50.242
(<r2>)1/2 7.088