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: TPSSh/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at TPSSh/aug-cc-pVDZ
 hartrees
Energy at 0K-152.883755
Energy at 298.15K-152.886611
HF Energy-152.883755
Nuclear repulsion energy36.593705
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 TPSSh/aug-cc-pVDZ
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' 3832 3706 69.00      
2 A' 3745 3623 7.50      
3 A' 3605 3487 353.89      
4 A' 1652 1598 30.90      
5 A' 1630 1577 82.18      
6 A' 381 368 42.87      
7 A' 192 185 192.57      
8 A' 163 158 87.92      
9 A" 3853 3727 67.17      
10 A" 655 633 82.96      
11 A" 162 157 3.40      
12 A" 135 131 162.23      

Unscaled Zero Point Vibrational Energy (zpe) 10002.0 cm-1
Scaled (by 0.9673) Zero Point Vibrational Energy (zpe) 9675.0 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 TPSSh/aug-cc-pVDZ
ABC
6.98876 0.21718 0.21704

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.023 0.540 0.000
O2 0.006 1.517 0.000
O3 0.006 -1.393 0.000
H4 0.936 1.778 0.000
H5 -0.524 -1.656 0.767
H6 -0.524 -1.656 -0.767

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.97711.93321.53842.39012.3901
O20.97712.91010.96683.30763.3076
O31.93322.91013.30490.96850.9685
H41.53840.96683.30493.81013.8101
H52.39013.30760.96853.81011.5339
H62.39013.30760.96853.81011.5339

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 104.635 H1 O3 H5 106.083
H1 O3 H6 106.083 O2 H1 O3 178.455
H5 O3 H6 104.735
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.177      
2 O -0.269      
3 O -0.314      
4 H 0.101      
5 H 0.153      
6 H 0.153      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.144 -2.526 0.000 2.530
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.749 0.174 0.000
y 0.174 3.320 0.000
z 0.000 0.000 2.791


<r2> (average value of r2) Å2
<r2> 53.022
(<r2>)1/2 7.282