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All results from a given calculation for H2OH2O (water dimer)

using model chemistry: mPW1PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/6-31G*
 hartrees
Energy at 0K-152.788339
Energy at 298.15K-152.791212
HF Energy-152.788339
Nuclear repulsion energy37.062505
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 mPW1PW91/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3889 3688 56.85      
2 A' 3795 3599 15.61      
3 A' 3682 3491 293.92      
4 A' 1754 1663 80.53      
5 A' 1721 1632 81.86      
6 A' 458 434 36.41      
7 A' 232 220 170.72      
8 A' 152 144 251.08      
9 A" 3914 3711 59.89      
10 A" 698 662 138.29      
11 A" 176 167 192.21      
12 A" 68 65 36.48      

Unscaled Zero Point Vibrational Energy (zpe) 10269.3 cm-1
Scaled (by 0.9483) Zero Point Vibrational Energy (zpe) 9738.4 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 mPW1PW91/6-31G*
ABC
6.72693 0.22614 0.22564

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.162 0.504 0.000
O2 0.007 1.464 0.000
O3 0.007 -1.388 0.000
H4 0.891 1.845 0.000
H5 -0.579 -1.482 0.762
H6 -0.579 -1.482 -0.762

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.97321.89781.52682.25252.2525
O20.97322.85210.96313.09933.0993
O31.89782.85213.35180.96560.9656
H41.52680.96313.35183.71663.7166
H52.25253.09930.96563.71661.5243
H62.25253.09930.96563.71661.5243

picture of water dimer state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 O2 H4 104.087 H1 O3 H5 98.465
H1 O3 H6 98.465 O2 H1 O3 166.092
H5 O3 H6 104.237
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.417      
2 O -0.864      
3 O -0.788      
4 H 0.390      
5 H 0.423      
6 H 0.423      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.338 -2.081 0.000 2.108
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -10.701 6.567 0.000
y 6.567 -13.821 0.000
z 0.000 0.000 -11.337
Traceless
 xyz
x 1.879 6.567 0.000
y 6.567 -2.802 0.000
z 0.000 0.000 0.924
Polar
3z2-r21.847
x2-y23.120
xy6.567
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.594 0.314 0.000
y 0.314 1.911 0.000
z 0.000 0.000 1.423


<r2> (average value of r2) Å2
<r2> 50.732
(<r2>)1/2 7.123