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

using model chemistry: MP2/6-31G(2df,p)

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(2df,p)
 hartrees
Energy at 0K-152.545637
Energy at 298.15K-152.548338
HF Energy-152.064879
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy36.836071
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(2df,p)
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' 3978 3758 89.12      
2 A' 3864 3649 16.49      
3 A' 3798 3587 248.82      
4 A' 1722 1627 59.49      
5 A' 1688 1594 82.48      
6 A' 424 401 37.54      
7 A' 208 197 135.71      
8 A' 143 136 202.44      
9 A" 3982 3761 74.35      
10 A" 645 609 95.94      
11 A" 158 149 151.75      
12 A" 41 38 38.36      

Unscaled Zero Point Vibrational Energy (zpe) 10325.7 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 9752.6 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(2df,p)
ABC
6.79182 0.21846 0.21793

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.146 0.538 0.000
O2 0.007 1.493 0.000
O3 0.007 -1.411 0.000
H4 0.896 1.848 0.000
H5 -0.577 -1.521 0.754
H6 -0.577 -1.521 -0.754

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.96461.95381.50892.30912.3091
O20.96462.90340.95693.16103.1610
O31.95382.90343.37750.96020.9602
H41.50890.95693.37753.75313.7531
H52.30913.16100.96023.75311.5089
H62.30913.16100.96023.75311.5089

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 103.491 H1 O3 H5 99.084
H1 O3 H6 99.084 O2 H1 O3 167.617
H5 O3 H6 103.572
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability