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: CCSD(T)=FULL/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCSD(T)=FULL/Def2TZVPP
 hartrees
Energy at 0K-76.356429
Energy at 298.15K-76.357525
HF Energy-76.062387
Nuclear repulsion energy9.185568
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 CCSD(T)=FULL/Def2TZVPP
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 3837 3837        
2 A1 1666 1666        
3 B2 3943 3943        

Unscaled Zero Point Vibrational Energy (zpe) 4723.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4723.2 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 CCSD(T)=FULL/Def2TZVPP
ABC
26.97576 14.68981 9.51070

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.118
H2 0.000 0.755 -0.473
H3 0.000 -0.755 -0.473

Atom - Atom Distances (Å)
  O1 H2 H3
O10.95830.9583
H20.95831.5091
H30.95831.5091

picture of Water state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 O1 H3 103.874
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability