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All results from a given calculation for H2O (Water)

using model chemistry: PBEPBE/3-21G

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/3-21G
 hartrees
Energy at 0K-75.886477
Energy at 298.15K-75.887574
HF Energy-75.886477
Nuclear repulsion energy8.737823
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/3-21G
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 3304 3274 21.08 84.84 0.21 0.34
2 A1 1664 1649 28.86 14.09 0.50 0.67
3 B2 3448 3416 3.79 40.80 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4207.6 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 4169.3 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 PBEPBE/3-21G
ABC
23.71451 13.52142 8.61141

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.126
H2 0.000 0.786 -0.504
H3 0.000 -0.786 -0.504

Atom - Atom Distances (Å)
  O1 H2 H3
O11.00781.0078
H21.00781.5729
H31.00781.5729

picture of Water state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 O1 H3 102.592
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.625      
2 H 0.313      
3 H 0.313      


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 -2.209 2.209
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -6.898 0.000 0.000
y 0.000 -4.331 0.000
z 0.000 0.000 -5.817
Traceless
 xyz
x -1.825 0.000 0.000
y 0.000 2.027 0.000
z 0.000 0.000 -0.203
Polar
3z2-r2-0.405
x2-y2-2.568
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.120 0.000 0.000
y 0.000 1.135 0.000
z 0.000 0.000 0.715


<r2> (average value of r2) Å2
<r2> 5.421
(<r2>)1/2 2.328