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

using model chemistry: MP2/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-152.469233
Energy at 298.15K-152.472024
HF Energy-152.061177
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy36.662534
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/cc-pVDZ
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' 3939 3752 75.72      
2 A' 3836 3654 15.73      
3 A' 3784 3604 229.17      
4 A' 1713 1631 49.94      
5 A' 1673 1594 64.27      
6 A' 405 386 42.24      
7 A' 195 186 39.71      
8 A' 151 144 291.69      
9 A" 3950 3763 60.25      
10 A" 667 636 120.01      
11 A" 174 166 116.51      
12 A" 80 76 71.03      

Unscaled Zero Point Vibrational Energy (zpe) 10283.1 cm-1
Scaled (by 0.9525) Zero Point Vibrational Energy (zpe) 9794.6 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/cc-pVDZ
ABC
6.69417 0.21726 0.21662

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.170 0.536 0.000
O2 0.006 1.492 0.000
O3 0.006 -1.400 0.000
H4 0.900 1.849 0.000
H5 -0.581 -1.560 0.752
H6 -0.581 -1.560 -0.752

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.96981.94321.50192.35022.3502
O20.96982.89190.96293.19743.1974
O31.94322.89193.36990.96670.9667
H41.50190.96293.36993.79203.7920
H52.35023.19740.96673.79201.5034
H62.35023.19740.96673.79201.5034

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 101.993 H1 O3 H5 102.492
H1 O3 H6 102.492 O2 H1 O3 165.358
H5 O3 H6 102.079
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability