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

using model chemistry: PBEPBE/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 PBEPBE/6-31G*
 hartrees
Energy at 0K-152.658755
Energy at 298.15K 
HF Energy-152.658755
Counterpoise corrected energy-76.322472
CP Energy at 298.15K-76.325461
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy37.114242
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/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' 3712 3659 34.89      
2 A' 3615 3563 6.60      
3 A' 3476 3427 280.61      
4 A' 1710 1686 87.78      
5 A' 1681 1657 42.25      
6 A' 502 495 16.66      
7 A' 255 251 207.34      
8 A' 124 122 261.36      
9 A" 3732 3678 38.05      
10 A" 711 701 92.39      
11 A" 192 189 213.62      
12 A" 135i 133i 18.26      

Unscaled Zero Point Vibrational Energy (zpe) 9786.7 cm-1
Scaled (by 0.9857) Zero Point Vibrational Energy (zpe) 9646.7 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/6-31G*
ABC
6.59218 0.23220 0.23158

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.081 0.537 0.000
O2 0.008 1.516 0.000
O3 0.008 -1.409 0.000
H4 0.937 1.811 0.000
H5 -0.571 -1.604 0.764
H6 -0.571 -1.604 -0.764

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.98251.94681.53492.36492.3649
O20.98252.92510.97473.26443.2644
O31.94682.92513.35120.97820.9782
H41.53490.97473.35123.81063.8106
H52.36493.26440.97823.81061.5286
H62.36493.26440.97823.81061.5286

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 103.299 H1 O3 H5 102.828
H1 O3 H6 102.828 O2 H1 O3 173.530
H5 O3 H6 102.762
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.374      
2 O -0.818      
3 O -0.731      
4 H 0.370      
5 H 0.403      
6 H 0.403      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.269 -1.256 0.000 1.284
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -10.870 5.940 0.000
y 5.940 -14.700 0.000
z 0.000 0.000 -11.520
Traceless
 xyz
x 2.239 5.940 0.000
y 5.940 -3.505 0.000
z 0.000 0.000 1.266
Polar
3z2-r22.531
x2-y23.829
xy5.940
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.706 0.302 0.000
y 0.302 2.161 0.000
z 0.000 0.000 1.491


<r2> (average value of r2) Å2
<r2> 49.695
(<r2>)1/2 7.050