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

using model chemistry: HF/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 HF/6-31G*
 hartrees
Energy at 0K-152.030457
Energy at 298.15K-152.033151
HF Energy-152.030457
Counterpoise corrected energy-76.010742
CP Energy at 298.15K-76.013445
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy36.491802
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 HF/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' 4162 3740 113.23      
2 A' 4066 3653 30.20      
3 A' 4029 3620 185.05      
4 A' 1853 1665 104.03      
5 A' 1824 1639 114.69      
6 A' 383 345 94.95      
7 A' 182 163 116.84      
8 A' 135 121 267.51      
9 A" 4180 3755 89.95      
10 A" 619 556 217.23      
11 A" 142 127 157.19      
12 A" 115 103 60.70      

Unscaled Zero Point Vibrational Energy (zpe) 10844.7 cm-1
Scaled (by 0.8985) Zero Point Vibrational Energy (zpe) 9743.9 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 HF/6-31G*
ABC
7.26737 0.20645 0.20642

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.169 0.551 0.000
O2 0.004 1.490 0.000
O3 0.004 -1.404 0.000
H4 0.861 1.892 0.000
H5 -0.548 -1.567 0.755
H6 -0.548 -1.567 -0.755

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.95301.96181.50852.36032.3603
O20.95302.89350.94643.19673.1967
O31.96182.89353.40490.94930.9493
H41.50850.94643.40493.81023.8102
H52.36033.19670.94933.81021.5095
H62.36033.19670.94933.81021.5095

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 105.154 H1 O3 H5 102.733
H1 O3 H6 102.733 O2 H1 O3 165.210
H5 O3 H6 105.326
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.475      
2 O -0.925      
3 O -0.874      
4 H 0.424      
5 H 0.450      
6 H 0.450      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.154 -2.687 0.000 2.691
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -10.979 7.065 0.000
y 7.065 -12.248 0.000
z 0.000 0.000 -11.241
Traceless
 xyz
x 0.766 7.065 0.000
y 7.065 -1.139 0.000
z 0.000 0.000 0.373
Polar
3z2-r20.746
x2-y21.270
xy7.065
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.421 0.305 0.000
y 0.305 1.672 0.000
z 0.000 0.000 1.358


<r2> (average value of r2) Å2
<r2> 54.590
(<r2>)1/2 7.388