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All results from a given calculation for H2O (Water)

using model chemistry: mPW1PW91/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/STO-3G
 hartrees
Energy at 0K-75.315580
Energy at 298.15K-75.316679
HF Energy-75.315580
Nuclear repulsion energy8.651252
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 mPW1PW91/STO-3G
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 3710 3261 63.09 38.12 0.17 0.28
2 A1 2037 1791 3.48 9.43 0.74 0.85
3 B2 3939 3462 43.30 19.06 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4843.4 cm-1
Scaled (by 0.8789) Zero Point Vibrational Energy (zpe) 4256.9 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 mPW1PW91/STO-3G
ABC
20.78813 14.26776 8.46077

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/STO-3G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.135
H2 0.000 0.766 -0.538
H3 0.000 -0.766 -0.538

Atom - Atom Distances (Å)
  O1 H2 H3
O11.01941.0194
H21.01941.5312
H31.01941.5312

picture of Water state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 O1 H3 97.362
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.312      
2 H 0.156      
3 H 0.156      


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 -1.633 1.633
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -6.153 0.000 0.000
y 0.000 -4.557 0.000
z 0.000 0.000 -5.278
Traceless
 xyz
x -1.236 0.000 0.000
y 0.000 1.158 0.000
z 0.000 0.000 0.078
Polar
3z2-r20.156
x2-y2-1.596
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.005 0.000 0.000
y 0.000 0.813 0.000
z 0.000 0.000 0.439


<r2> (average value of r2) Å2
<r2> 5.226
(<r2>)1/2 2.286