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

using model chemistry: MP2/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-311G*
 hartrees
Energy at 0K-152.482756
Energy at 298.15K-152.485644
HF Energy-152.073623
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy37.059959
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 MP2/6-311G*
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' 3966 3769 72.62      
2 A' 3856 3664 4.42      
3 A' 3790 3602 207.75      
4 A' 1781 1693 91.60      
5 A' 1743 1657 119.91      
6 A' 422 401 105.39      
7 A' 216 205 22.80      
8 A' 160 152 388.94      
9 A" 3988 3789 56.24      
10 A" 736 699 221.69      
11 A" 175 167 214.98      
12 A" 85 81 24.80      

Unscaled Zero Point Vibrational Energy (zpe) 10458.2 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 9938.4 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 MP2/6-311G*
ABC
7.23550 0.22320 0.22300

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.141 0.543 0.000
O2 0.004 1.496 0.000
O3 0.004 -1.406 0.000
H4 0.874 1.897 0.000
H5 -0.542 -1.581 0.772
H6 -0.542 -1.581 -0.772

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.96331.95311.53972.36042.3604
O20.96332.90170.95763.21903.2190
O31.95312.90173.41500.96160.9616
H41.53970.95763.41503.83343.8334
H52.36043.21900.96163.83341.5436
H62.36043.21900.96163.83341.5436

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 106.565 H1 O3 H5 102.808
H1 O3 H6 102.808 O2 H1 O3 167.804
H5 O3 H6 106.772
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability