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: PBEPBE/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 PBEPBE/SDD
 hartrees
Energy at 0K-76.328132
Energy at 298.15K-76.329226
HF Energy-76.328132
Nuclear repulsion energy8.915160
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 PBEPBE/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 3561 3561 6.89      
2 A1 1549 1549 73.01      
3 B2 3756 3756 9.76      

Unscaled Zero Point Vibrational Energy (zpe) 4433.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4433.1 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 PBEPBE/SDD
ABC
28.59654 13.00106 8.93766

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.115
H2 0.000 0.802 -0.459
H3 0.000 -0.802 -0.459

Atom - Atom Distances (Å)
  O1 H2 H3
O10.98620.9862
H20.98621.6041
H30.98621.6041

picture of Water state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 O1 H3 108.833
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.699      
2 H 0.349      
3 H 0.349      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -2.444 2.444
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -7.445 0.000 0.000
y 0.000 -4.039 0.000
z 0.000 0.000 -6.399
Traceless
 xyz
x -2.226 0.000 0.000
y 0.000 2.882 0.000
z 0.000 0.000 -0.657
Polar
3z2-r2-1.313
x2-y2-3.405
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.231 0.000 0.000
y 0.000 1.167 0.000
z 0.000 0.000 0.765


<r2> (average value of r2) Å2
<r2> 5.537
(<r2>)1/2 2.353