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

using model chemistry: CID/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 CID/3-21G*
 hartrees
Energy at 0K-151.431546
Energy at 298.15K-151.434852
HF Energy-151.188135
Nuclear repulsion energy36.872055
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 CID/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' 3673 3418 58.37      
2 A' 3588 3339 0.14      
3 A' 3526 3281 209.07      
4 A' 1811 1685 64.54      
5 A' 1747 1626 72.65      
6 A' 512 476 75.43      
7 A' 266 248 194.96      
8 A' 214 199 251.46      
9 A" 3717 3459 10.73      
10 A" 826 769 211.05      
11 A" 220 204 32.49      
12 A" 142 132 200.75      

Unscaled Zero Point Vibrational Energy (zpe) 10120.5 cm-1
Scaled (by 0.9305) Zero Point Vibrational Energy (zpe) 9417.1 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 CID/3-21G*
ABC
6.62832 0.22947 0.22938

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.080 0.477 0.000
O2 0.004 1.463 0.000
O3 0.004 -1.353 0.000
H4 0.926 1.806 0.000
H5 -0.537 -1.583 0.790
H6 -0.537 -1.583 -0.790

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.98921.83071.57612.29032.2903
O20.98922.81550.98383.19283.1928
O31.83072.81553.29030.98490.9849
H41.57610.98383.29033.77493.7749
H52.29033.19280.98493.77491.5796
H62.29033.19280.98493.77491.5796

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 106.029 H1 O3 H5 104.848
H1 O3 H6 104.848 O2 H1 O3 173.265
H5 O3 H6 106.624
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability