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

using model chemistry: MP2_cp_opt/6-311+G(3df,2pd)

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_cp_opt/6-311+G(3df,2pd)
 hartrees
Energy at 0K-76.058253
Energy at 298.15K-76.060906
HF Energy-76.058253
Nuclear repulsion energy9.174672
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_cp_opt/6-311+G(3df,2pd)
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' 3961 3763 114.18      
2 A' 3865 3672 16.29      
3 A' 3787 3597 268.10      
4 A' 1652 1570 39.91      
5 A' 1633 1552 85.82      
6 A' 341 324 62.89      
7 A' 172 163 142.51      
8 A' 143 136 149.35      
9 A" 3977 3778 98.22      
10 A" 600 570 110.24      
11 A" 144 137 110.82      
12 A" 117 112 67.49      

Unscaled Zero Point Vibrational Energy (zpe) 10196.4 cm-1
Scaled (by 0.95) Zero Point Vibrational Energy (zpe) 9686.5 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_cp_opt/6-311+G(3df,2pd)
ABC
7.33012 0.20753 0.20748

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2_cp_opt/6-311+G(3df,2pd)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.088 0.582 0.000
O2 -0.002 1.543 0.000
O3 -0.002 -1.411 0.000
H4 0.900 1.866 0.000
H5 -0.481 -1.751 0.758
H6 -0.481 -1.751 -0.758

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.96491.99571.51902.51832.5183
O20.96492.95430.95763.41373.4137
O31.99572.95433.39920.95930.9593
H41.51900.95763.39923.94513.9451
H52.51833.41370.95933.94511.5169
H62.51833.41370.95933.94511.5169

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 104.399 H1 O3 H5 112.074
H1 O3 H6 112.074 O2 H1 O3 172.102
H5 O3 H6 104.489
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability