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

using model chemistry: MP2/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31G**
 hartrees
Energy at 0K-152.450801
Energy at 298.15K-152.453600
HF Energy-152.054192
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy36.690446
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 MP2/6-31G**
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' 3998 3744 78.81      
2 A' 3877 3630 13.20      
3 A' 3818 3575 204.46      
4 A' 1715 1606 74.58      
5 A' 1680 1573 78.25      
6 A' 426 399 36.07      
7 A' 203 191 159.59      
8 A' 144 135 249.72      
9 A" 4007 3753 60.46      
10 A" 660 618 141.00      
11 A" 162 152 164.68      
12 A" 91 85 57.17      

Unscaled Zero Point Vibrational Energy (zpe) 10390.2 cm-1
Scaled (by 0.9365) Zero Point Vibrational Energy (zpe) 9730.4 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 MP2/6-31G**
ABC
6.76760 0.21656 0.21610

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.155 0.542 0.000
O2 0.007 1.497 0.000
O3 0.007 -1.418 0.000
H4 0.891 1.871 0.000
H5 -0.576 -1.526 0.760
H6 -0.576 -1.526 -0.760

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.96751.96471.51972.32092.3209
O20.96752.91500.96053.17143.1714
O31.96472.91503.40560.96340.9634
H41.51970.96053.40563.77763.7776
H52.32093.17140.96343.77761.5194
H62.32093.17140.96343.77761.5194

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 104.047 H1 O3 H5 99.094
H1 O3 H6 99.094 O2 H1 O3 166.802
H5 O3 H6 104.105
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability