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: B3LYP_cp_opt/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP_cp_opt/aug-cc-pVTZ
 hartrees
Energy at 0K-76.466194
Energy at 298.15K-76.468971
HF Energy-76.466194
Nuclear repulsion energy9.144534
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 B3LYP_cp_opt/aug-cc-pVTZ
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' 3870 3754 86.60      
2 A' 3796 3682 10.75      
3 A' 3677 3567 330.80      
4 A' 1647 1598 39.14      
5 A' 1627 1578 91.41      
6 A' 362 351 51.89      
7 A' 188 182 197.00      
8 A' 158 153 81.98      
9 A" 3895 3778 84.26      
10 A" 624 605 94.16      
11 A" 150 146 26.77      
12 A" 130 126 139.61      

Unscaled Zero Point Vibrational Energy (zpe) 10061.1 cm-1
Scaled (by 0.97) Zero Point Vibrational Energy (zpe) 9759.2 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 B3LYP_cp_opt/aug-cc-pVTZ
ABC
7.23827 0.21249 0.21239

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP_cp_opt/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.087 0.558 0.000
O2 -0.001 1.523 0.000
O3 -0.001 -1.396 0.000
H4 0.899 1.862 0.000
H5 -0.486 -1.718 0.766
H6 -0.486 -1.718 -0.766

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.96981.95591.53612.46842.4684
O20.96982.91980.96093.36583.3658
O31.95592.91983.37990.96220.9622
H41.53610.96093.37993.91383.9138
H52.46843.36580.96223.91381.5318
H62.46843.36580.96223.91381.5318

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 105.423 H1 O3 H5 110.881
H1 O3 H6 110.881 O2 H1 O3 172.246
H5 O3 H6 105.494
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP_cp_opt/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.000      
2 O 0.000      
3 O -0.357      
4 H 0.000      
5 H 0.179      
6 H 0.179      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.050 -2.642 0.000 2.643
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -6.610 2.934 0.000
y 2.934 -4.444 0.000
z 0.000 0.000 -4.451
Traceless
 xyz
x -2.163 2.934 0.000
y 2.934 1.087 0.000
z 0.000 0.000 1.076
Polar
3z2-r22.153
x2-y2-2.167
xy2.934
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.429 0.023 0.000
y 0.023 1.410 0.000
z 0.000 0.000 1.525


<r2> (average value of r2) Å2
<r2> 53.981
(<r2>)1/2 7.347