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

using model chemistry: PBEPBE/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 PBEPBE/6-311G*
 hartrees
Energy at 0K-152.707976
Energy at 298.15K 
HF Energy-152.707976
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy37.166810
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/6-311G*
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' 3738 3699 25.43      
2 A' 3658 3620 1.00      
3 A' 3488 3452 283.88      
4 A' 1702 1685 71.42      
5 A' 1683 1665 90.36      
6 A' 478 473 51.55      
7 A' 236 234 80.00      
8 A' 129 127 379.45      
9 A" 3772 3733 29.49      
10 A" 762 754 151.55      
11 A" 203 201 218.10      
12 A" 108i 107i 29.85      

Unscaled Zero Point Vibrational Energy (zpe) 9870.8 cm-1
Scaled (by 0.9896) Zero Point Vibrational Energy (zpe) 9768.1 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/6-311G*
ABC
6.69589 0.23147 0.23117

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.100 0.531 0.000
O2 0.006 1.504 0.000
O3 0.006 -1.404 0.000
H4 0.912 1.852 0.000
H5 -0.554 -1.593 0.775
H6 -0.554 -1.593 -0.775

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.97791.93681.55042.35292.3529
O20.97792.90780.97063.24073.2407
O31.93682.90783.37920.97410.9741
H41.55040.97063.37923.82243.8224
H52.35293.24070.97413.82241.5495
H62.35293.24070.97413.82241.5495

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 105.434 H1 O3 H5 102.805
H1 O3 H6 102.805 O2 H1 O3 171.651
H5 O3 H6 105.366
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.396      
2 O -0.838      
3 O -0.772      
4 H 0.379      
5 H 0.417      
6 H 0.417      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.306 -2.191 0.000 2.212
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.177 6.867 0.000
y 6.867 -14.044 0.000
z 0.000 0.000 -11.619
Traceless
 xyz
x 1.654 6.867 0.000
y 6.867 -2.646 0.000
z 0.000 0.000 0.992
Polar
3z2-r21.983
x2-y22.867
xy6.867
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.720 0.403 0.000
y 0.403 2.258 0.000
z 0.000 0.000 1.642


<r2> (average value of r2) Å2
<r2> 50.057
(<r2>)1/2 7.075