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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-152.679961
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 energy37.031958
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' 3779 3728 32.55      
2 A' 3688 3638 6.49      
3 A' 3542 3493 282.24      
4 A' 1662 1639 71.45      
5 A' 1632 1609 44.94      
6 A' 482 475 17.91      
7 A' 240 236 185.55      
8 A' 128 126 249.03      
9 A" 3797 3745 39.08      
10 A" 693 684 86.26      
11 A" 189 186 195.54      
12 A" 120i 118i 21.84      

Unscaled Zero Point Vibrational Energy (zpe) 9855.7 cm-1
Scaled (by 0.9863) Zero Point Vibrational Energy (zpe) 9720.7 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
6.60001 0.22876 0.22812

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 0.057 0.542 0.000
O2 0.008 1.519 0.000
O3 0.008 -1.407 0.000
H4 0.942 1.789 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
H10.97851.94941.52852.36842.3684
O20.97852.92600.97133.27373.2737
O31.94942.92603.32900.97510.9751
H41.52850.97133.32903.79783.7978
H52.36843.27370.97513.79781.5195
H62.36843.27370.97513.79781.5195

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 103.052
H1 O3 H6 103.052 O2 H1 O3 175.700
H5 O3 H6 102.366
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 0.284      
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
  -0.305 -1.417 0.000 1.449
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -10.828 5.893 0.000
y 5.893 -14.532 0.000
z 0.000 0.000 -11.463
Traceless
 xyz
x 2.169 5.893 0.000
y 5.893 -3.387 0.000
z 0.000 0.000 1.217
Polar
3z2-r22.435
x2-y23.704
xy5.893
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.752 0.308 0.000
y 0.308 2.181 0.000
z 0.000 0.000 1.530


<r2> (average value of r2) Å2
<r2> 50.253
(<r2>)1/2 7.089