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: MP4=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 MP4=FULL/SDD
 hartrees
Energy at 0K-76.156895
Energy at 298.15K-76.157991
HF Energy-76.009489
Nuclear repulsion energy8.977530
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 MP4=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 3655 3655        
2 A1 1635 1635        
3 B2 3837 3837        

Unscaled Zero Point Vibrational Energy (zpe) 4563.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4563.3 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 MP4=FULL/SDD
ABC
30.14429 12.94490 9.05598

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=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 -0.447
H3 0.000 -0.804 -0.447

Atom - Atom Distances (Å)
  O1 H2 H3
O10.97900.9790
H20.97901.6076
H30.97901.6076

picture of Water state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 O1 H3 110.372
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability