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

using model chemistry: CCD/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 CCD/3-21G*
 hartrees
Energy at 0K-151.448036
Energy at 298.15K-151.451347
HF Energy-151.187284
Counterpoise corrected energy-151.448036
CP Energy at 298.15K-151.451347
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy36.742199
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 CCD/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 3635 3476 4.56      
2 A 3595 3439 69.16      
3 A 3502 3349 4.03      
4 A 3456 3305 177.21      
5 A 1796 1718 56.90      
6 A 1732 1657 64.54      
7 A 821 785 197.59      
8 A 514 491 68.50      
9 A 270 258 212.34      
10 A 223 213 37.45      
11 A 215 206 226.36      
12 A 139 133 191.60      

Unscaled Zero Point Vibrational Energy (zpe) 9947.9 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 9515.1 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 CCD/3-21G*
ABC
6.50481 0.22858 0.22837

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.055 0.527 0.000
O2 0.007 1.513 0.000
O3 0.007 -1.404 0.000
H4 0.937 1.846 0.000
H5 -0.549 -1.622 0.794
H6 -0.549 -1.622 -0.794

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.98751.93161.58682.36932.3693
O20.98752.91730.98833.28163.2816
O31.93162.91733.38090.99280.9928
H41.58680.98833.38093.85583.8558
H52.36933.28160.99283.85581.5872
H62.36933.28160.99283.85581.5872

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 106.859 H1 O3 H5 103.516
H1 O3 H6 103.516 O2 H1 O3 175.716
H5 O3 H6 106.131
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability