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: MP3/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP3/TZVP
 hartrees
Energy at 0K-76.279275
Energy at 298.15K-76.280372
HF Energy-76.056218
Nuclear repulsion energy9.197010
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 MP3/TZVP
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 3916 3663 6.87      
2 A1 1652 1545 61.37      
3 B2 4016 3756 39.60      

Unscaled Zero Point Vibrational Energy (zpe) 4791.9 cm-1
Scaled (by 0.9352) Zero Point Vibrational Energy (zpe) 4481.4 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 MP3/TZVP
ABC
27.01831 14.73469 9.53480

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.118
H2 0.000 0.753 -0.472
H3 0.000 -0.753 -0.472

Atom - Atom Distances (Å)
  O1 H2 H3
O10.95720.9572
H20.95721.5068
H30.95721.5068

picture of Water state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 O1 H3 103.833
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability