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

using model chemistry: QCISD/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/6-31+G**
 hartrees
Energy at 0K-152.492450
Energy at 298.15K-152.495303
HF Energy-152.068844
Counterpoise corrected energy-152.492450
CP Energy at 298.15K-152.495303
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy36.317500
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 QCISD/6-31+G**
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' 3978 3761 117.40      
2 A' 3875 3664 9.84      
3 A' 3829 3620 197.92      
4 A' 1679 1588 66.02      
5 A' 1658 1567 104.40      
6 A' 360 341 132.67      
7 A' 195 184 151.45      
8 A' 165 156 141.04      
9 A" 3998 3780 75.15      
10 A" 653 617 195.23      
11 A" 170 161 66.62      
12 A" 141 133 136.99      

Unscaled Zero Point Vibrational Energy (zpe) 10350.6 cm-1
Scaled (by 0.9454) Zero Point Vibrational Energy (zpe) 9785.5 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 QCISD/6-31+G**
ABC
7.52464 0.20880 0.20845

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.138 0.554 0.000
O2 0.005 1.513 0.000
O3 0.005 -1.418 0.000
H4 0.887 1.897 0.000
H5 -0.551 -1.608 0.767
H6 -0.551 -1.608 -0.767

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.96841.97621.53782.39512.3951
O20.96842.93090.96243.26143.2614
O31.97622.93093.43030.96570.9657
H41.53780.96243.43033.86533.8653
H52.39513.26140.96573.86531.5331
H62.39513.26140.96573.86531.5331

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 105.580 H1 O3 H5 103.612
H1 O3 H6 103.612 O2 H1 O3 168.184
H5 O3 H6 105.086
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability