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

using model chemistry: MP4/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP4/3-21G
 hartrees
Energy at 0K-151.451758
Energy at 298.15K-151.455094
HF Energy-151.186751
Counterpoise corrected energy-151.451758
CP Energy at 298.15K-151.455094
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy36.766321
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 MP4/3-21G
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' 3567 3460        
2 A' 3463 3358        
3 A' 3415 3312        
4 A' 1787 1733        
5 A' 1721 1669        
6 A' 523 507        
7 A' 278 269        
8 A' 217 211        
9 A" 3601 3492        
10 A" 828 803        
11 A" 227 220        
12 A" 133 129        

Unscaled Zero Point Vibrational Energy (zpe) 9880.0 cm-1
Scaled (by 0.9698) Zero Point Vibrational Energy (zpe) 9581.6 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 MP4/3-21G
ABC
6.41798 0.23009 0.22977

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.098 0.467 0.000
O2 0.006 1.459 0.000
O3 0.006 -1.359 0.000
H4 0.935 1.807 0.000
H5 -0.567 -1.537 0.792
H6 -0.567 -1.537 -0.792

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.99651.82761.58022.25502.2550
O20.99652.81760.99163.15163.1516
O31.82762.81763.29940.99350.9935
H41.58020.99163.29943.75083.7508
H52.25503.15160.99353.75081.5833
H62.25503.15160.99353.75081.5833

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 105.273 H1 O3 H5 102.048
H1 O3 H6 102.048 O2 H1 O3 171.813
H5 O3 H6 105.659
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability