return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for H2O (Water)

using model chemistry: MP2=FULL/SDD

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2=FULL/SDD
 hartrees
Energy at 0K-76.149334
Energy at 298.15K-76.150430
HF Energy-76.009523
Nuclear repulsion energy8.979281
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 MP2=FULL/SDD
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3673 3462 0.43      
2 A1 1624 1531 100.35      
3 B2 3871 3649 26.97      

Unscaled Zero Point Vibrational Energy (zpe) 4583.6 cm-1
Scaled (by 0.9427) Zero Point Vibrational Energy (zpe) 4320.9 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 MP2=FULL/SDD
ABC
30.28973 12.92420 9.05890

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/SDD

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.112
H2 0.000 0.804 -0.446
H3 0.000 -0.804 -0.446

Atom - Atom Distances (Å)
  O1 H2 H3
O10.97880.9788
H20.97881.6089
H30.97881.6089

picture of Water state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 O1 H3 110.545
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability