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

using model chemistry: CCSD(T)/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCSD(T)/6-31G**
 hartrees
Energy at 0K-152.473949
Energy at 298.15K-152.476726
HF Energy-152.054213
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy36.588503
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 CCSD(T)/6-31G**
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' 3972 3767        
2 A' 3861 3662        
3 A' 3825 3628        
4 A' 1724 1636        
5 A' 1692 1605        
6 A' 419 397        
7 A' 201 190        
8 A' 142 134        
9 A" 3980 3775        
10 A" 644 611        
11 A" 166 157        
12 A" 88 84        

Unscaled Zero Point Vibrational Energy (zpe) 10356.4 cm-1
Scaled (by 0.9485) Zero Point Vibrational Energy (zpe) 9823.0 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 CCSD(T)/6-31G**
ABC
6.76478 0.21436 0.21392

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.164 0.550 0.000
O2 0.006 1.504 0.000
O3 0.006 -1.426 0.000
H4 0.888 1.887 0.000
H5 -0.577 -1.528 0.760
H6 -0.577 -1.528 -0.760

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.96661.98291.52012.33372.3337
O20.96662.93030.96123.17983.1798
O31.98292.93033.42850.96370.9637
H41.52010.96123.42853.79283.7928
H52.33373.17980.96373.79281.5200
H62.33373.17980.96373.79281.5200

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 104.093 H1 O3 H5 98.812
H1 O3 H6 98.812 O2 H1 O3 166.061
H5 O3 H6 104.112
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability