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

using model chemistry: MP3=FULL/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 MP3=FULL/3-21G*
 hartrees
Energy at 0K-151.444168
Energy at 298.15K-151.447479
HF Energy-151.187732
Nuclear repulsion energy36.828633
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 MP3=FULL/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' 3634 3634 60.41      
2 A' 3548 3548 1.79      
3 A' 3488 3488 201.17      
4 A' 1800 1800 60.65      
5 A' 1736 1736 68.16      
6 A' 513 513 70.44      
7 A' 269 269 197.82      
8 A' 215 215 245.49      
9 A" 3678 3678 7.93      
10 A" 826 826 203.15      
11 A" 221 221 35.17      
12 A" 140 140 195.55      

Unscaled Zero Point Vibrational Energy (zpe) 10033.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 10033.5 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 MP3=FULL/3-21G*
ABC
6.56418 0.22953 0.22938

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.083 0.474 0.000
O2 0.005 1.463 0.000
O3 0.005 -1.354 0.000
H4 0.930 1.805 0.000
H5 -0.545 -1.574 0.791
H6 -0.545 -1.574 -0.791

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.99181.82951.57762.28302.2830
O20.99182.81650.98673.18523.1852
O31.82952.81653.29150.98770.9877
H41.57760.98673.29153.77033.7703
H52.28303.18520.98773.77031.5811
H62.28303.18520.98773.77031.5811

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 105.761 H1 O3 H5 104.246
H1 O3 H6 104.246 O2 H1 O3 173.009
H5 O3 H6 106.330
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability