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

using model chemistry: B3LYP/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/6-31G(2df,p)
 hartrees
Energy at 0K-152.863560
Energy at 298.15K 
HF Energy-152.863560
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy36.831629
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 B3LYP/6-31G(2df,p)
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' 3876 3740 52.81      
2 A' 3796 3663 9.93      
3 A' 3695 3565 283.48      
4 A' 1695 1636 52.90      
5 A' 1662 1604 76.64      
6 A' 430 415 37.43      
7 A' 216 208 137.66      
8 A' 153 148 179.52      
9 A" 3895 3758 53.69      
10 A" 647 624 84.55      
11 A" 170 164 136.74      
12 A" 35i 33i 39.84      

Unscaled Zero Point Vibrational Energy (zpe) 10099.5 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 9746.1 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 B3LYP/6-31G(2df,p)
ABC
6.73735 0.21996 0.21946

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.140 0.527 0.000
O2 0.007 1.488 0.000
O3 0.007 -1.406 0.000
H4 0.900 1.844 0.000
H5 -0.575 -1.513 0.760
H6 -0.575 -1.513 -0.760

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.96991.93701.52082.29152.2915
O20.96992.89320.96113.15003.1500
O31.93702.89323.37000.96360.9636
H41.52080.96113.37003.74503.7450
H52.29153.15000.96363.74501.5205
H62.29153.15000.96363.74501.5205

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 103.912 H1 O3 H5 98.790
H1 O3 H6 98.790 O2 H1 O3 168.220
H5 O3 H6 104.171
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.288      
2 O -0.633      
3 O -0.557      
4 H 0.282      
5 H 0.310      
6 H 0.310      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.328 -2.022 0.000 2.049
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -10.766 5.866 0.000
y 5.866 -13.475 0.000
z 0.000 0.000 -11.339
Traceless
 xyz
x 1.640 5.866 0.000
y 5.866 -2.423 0.000
z 0.000 0.000 0.782
Polar
3z2-r21.564
x2-y22.709
xy5.866
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.914 0.301 0.000
y 0.301 2.330 0.000
z 0.000 0.000 1.794


<r2> (average value of r2) Å2
<r2> 51.823
(<r2>)1/2 7.199