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

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/6-31G*
 hartrees
Energy at 0K-152.658753
Energy at 298.15K 
HF Energy-152.658753
Counterpoise corrected energy-152.652967
CP Energy at 298.15K-152.655974
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy37.112099
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 PBEPBEultrafine/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' 3710 3649 34.99      
2 A' 3613 3553 6.60      
3 A' 3475 3418 281.20      
4 A' 1710 1682 87.12      
5 A' 1680 1653 42.87      
6 A' 502 493 15.87      
7 A' 254 250 204.01      
8 A' 123 121 264.80      
9 A" 3730 3668 38.07      
10 A" 712 700 92.81      
11 A" 191 188 214.04      
12 A" 137i 134i 17.42      

Unscaled Zero Point Vibrational Energy (zpe) 9781.6 cm-1
Scaled (by 0.9835) Zero Point Vibrational Energy (zpe) 9620.3 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 PBEPBEultrafine/6-31G*
ABC
6.59026 0.23216 0.23153

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.082 0.537 0.000
O2 0.008 1.516 0.000
O3 0.008 -1.409 0.000
H4 0.936 1.812 0.000
H5 -0.571 -1.604 0.764
H6 -0.571 -1.604 -0.764

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.98251.94681.53492.36482.3648
O20.98252.92500.97473.26403.2640
O31.94682.92503.35180.97820.9782
H41.53490.97473.35183.81083.8108
H52.36483.26400.97823.81081.5287
H62.36483.26400.97823.81081.5287

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 103.299 H1 O3 H5 102.823
H1 O3 H6 102.823 O2 H1 O3 173.456
H5 O3 H6 102.773
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.374      
2 O -0.818      
3 O -0.731      
4 H 0.370      
5 H 0.403      
6 H 0.403      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.270 -1.264 0.000 1.293
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -10.868 5.944 0.000
y 5.944 -14.697 0.000
z 0.000 0.000 -11.519
Traceless
 xyz
x 2.240 5.944 0.000
y 5.944 -3.504 0.000
z 0.000 0.000 1.264
Polar
3z2-r22.527
x2-y23.829
xy5.944
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.707 0.303 0.000
y 0.303 2.160 0.000
z 0.000 0.000 1.491


<r2> (average value of r2) Å2
<r2> 49.704
(<r2>)1/2 7.050