return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for H2O (Water)

using model chemistry: M06-2X/aug-cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at M06-2X/aug-cc-pVQZ
 hartrees
Energy at 0K-76.434046
Energy at 298.15K-76.435142
HF Energy-76.434046
Nuclear repulsion energy9.180545
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 M06-2X/aug-cc-pVQZ
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 3875 3875 9.67      
2 A1 1620 1620 82.43      
3 B2 3979 3979 82.03      

Unscaled Zero Point Vibrational Energy (zpe) 4737.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4737.3 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 M06-2X/aug-cc-pVQZ
ABC
27.81791 14.41374 9.49431

See section I.F.4 to change rotational constant units
Geometric Data calculated at M06-2X/aug-cc-pVQZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.116
H2 0.000 0.762 -0.465
H3 0.000 -0.762 -0.465

Atom - Atom Distances (Å)
  O1 H2 H3
O10.95850.9585
H20.95851.5235
H30.95851.5235

picture of Water state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 O1 H3 105.252
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at M06-2X/aug-cc-pVQZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.427      
2 H 0.214      
3 H 0.214      


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 -1.880 1.880
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -7.707 0.000 0.000
y 0.000 -4.367 0.000
z 0.000 0.000 -6.411
Traceless
 xyz
x -2.318 0.000 0.000
y 0.000 2.691 0.000
z 0.000 0.000 -0.374
Polar
3z2-r2-0.747
x2-y2-3.339
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.332 0.000 0.000
y 0.000 1.466 0.000
z 0.000 0.000 1.390


<r2> (average value of r2) Å2
<r2> 5.551
(<r2>)1/2 2.356