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

using model chemistry: PBEPBEultrafine_cp_opt/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 PBEPBEultrafine_cp_opt/3-21G
 hartrees
Energy at 0K-151.785559
Energy at 298.15K-151.788703
Nuclear repulsion energy36.370138
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 PBEPBEultrafine_cp_opt/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 3483 3451 0.58      
2 A 3392 3361 28.05      
3 A 3336 3306 13.64      
4 A 3104 3076 265.23      
5 A 1711 1695 51.33      
6 A 1655 1640 38.45      
7 A 782 775 205.61      
8 A 449 445 119.49      
9 A 235 233 7.39      
10 A 200 198 186.36      
11 A 199 197 109.84      
12 A 136 135 160.01      

Unscaled Zero Point Vibrational Energy (zpe) 9341.4 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 9256.4 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 PBEPBEultrafine_cp_opt/3-21G
ABC
6.77599 0.22670 0.22657

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -1.783 0.794 -0.306
O2 -1.322 -0.000 0.103
O3 1.485 0.000 -0.126
H4 -1.785 -0.791 -0.312
H5 1.794 -0.003 0.833
H6 0.466 0.000 -0.031
X7 -2.246 0.004 -0.721
X8 0.774 -0.003 0.928

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6 X7 X8
H11.00543.36781.58463.83722.40031.00532.9489
O21.00542.81621.00533.19981.79241.23772.2524
O33.36782.81623.36921.00691.02393.77801.2708
H41.58461.00533.36923.83852.40181.00542.9502
H53.83723.19981.00693.83851.58414.32781.0239
H62.40031.79241.02392.40181.58412.79781.0069
X71.00531.23773.77801.00544.32782.79783.4405
X82.94892.25241.27082.95021.02391.00693.4405

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 104.015 H1 O3 H5 110.438
H1 O3 H6 16.006 O2 H1 O3 49.231
H5 O3 H6 102.525
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability