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

using model chemistry: MP2/cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/cc-pVQZ
 hartrees
Energy at 0K-152.704033
Energy at 298.15K-152.706759
HF Energy-152.135472
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy36.703739
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 MP2/cc-pVQZ
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' 3946 3742 104.51      
2 A' 3844 3646 12.70      
3 A' 3756 3562 282.31      
4 A' 1666 1580 41.15      
5 A' 1641 1556 84.94      
6 A' 366 347 53.37      
7 A' 183 173 71.54      
8 A' 146 138 223.45      
9 A" 3963 3758 93.61      
10 A" 634 601 103.97      
11 A" 135 128 174.70      
12 A" 127 121 2.09      

Unscaled Zero Point Vibrational Energy (zpe) 10202.4 cm-1
Scaled (by 0.9484) Zero Point Vibrational Energy (zpe) 9675.9 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 MP2/cc-pVQZ
ABC
7.16808 0.21549 0.21540

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/cc-pVQZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.086 0.552 0.000
O2 0.001 1.513 0.000
O3 0.001 -1.390 0.000
H4 0.904 1.830 0.000
H5 -0.507 -1.684 0.758
H6 -0.507 -1.684 -0.758

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.96471.94431.51712.43462.4346
O20.96472.90350.95683.32513.3251
O31.94432.90353.34410.95880.9588
H41.51710.95683.34413.86173.8617
H52.43463.32510.95883.86171.5162
H62.43463.32510.95883.86171.5162

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 104.284 H1 O3 H5 109.225
H1 O3 H6 109.225 O2 H1 O3 172.479
H5 O3 H6 104.492
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability