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/6-311G*

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/6-311G*
 hartrees
Energy at 0K-76.265678
Energy at 298.15K-76.266776
HF Energy-76.031626
Nuclear repulsion energy9.178425
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/6-311G*
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 3813 3813        
2 A1 1746 1746        
3 B2 3936 3936        

Unscaled Zero Point Vibrational Energy (zpe) 4747.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4747.6 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/6-311G*
ABC
28.54427 14.20447 9.48464

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.115
H2 0.000 0.767 -0.460
H3 0.000 -0.767 -0.460

Atom - Atom Distances (Å)
  O1 H2 H3
O10.95850.9585
H20.95851.5346
H30.95851.5346

picture of Water state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 O1 H3 106.366
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability