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

using model chemistry: B3LYP/CEP-121G*

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/CEP-121G*
 hartrees
Energy at 0K-34.366274
Energy at 298.15K-34.368968
HF Energy-34.366274
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy25.620509
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/CEP-121G*
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' 3844 3727 49.04      
2 A' 3760 3645 5.92      
3 A' 3657 3546 249.94      
4 A' 1712 1659 62.79      
5 A' 1693 1641 111.71      
6 A' 405 393 73.66      
7 A' 203 197 62.67      
8 A' 133 129 321.88      
9 A" 3875 3756 42.98      
10 A" 673 652 171.28      
11 A" 151 147 208.45      
12 A" 60 58 14.07      

Unscaled Zero Point Vibrational Energy (zpe) 10083.0 cm-1
Scaled (by 0.9694) Zero Point Vibrational Energy (zpe) 9774.5 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/CEP-121G*
ABC
6.90625 0.21831 0.21820

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-121G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.113 0.528 0.000
O2 0.003 1.498 0.000
O3 0.003 -1.389 0.000
H4 0.903 1.856 0.000
H5 -0.532 -1.631 0.772
H6 -0.532 -1.631 -0.772

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.97671.91981.54532.38212.3821
O20.97672.88700.96833.26763.2676
O31.91982.88703.36740.96990.9699
H41.54530.96833.36743.84933.8493
H52.38213.26760.96993.84931.5439
H62.38213.26760.96993.84931.5439

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 105.219 H1 O3 H5 106.347
H1 O3 H6 106.347 O2 H1 O3 170.236
H5 O3 H6 105.481
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.436      
2 O -0.880      
3 O -0.835      
4 H 0.405      
5 H 0.437      
6 H 0.437      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.187 -2.693 0.000 2.700
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.437 7.053 0.000
y 7.053 -13.014 0.000
z 0.000 0.000 -11.736
Traceless
 xyz
x 0.938 7.053 0.000
y 7.053 -1.428 0.000
z 0.000 0.000 0.490
Polar
3z2-r20.980
x2-y21.577
xy7.053
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.833 0.340 0.000
y 0.340 2.287 0.000
z 0.000 0.000 1.797


<r2> (average value of r2) Å2
<r2> 44.207
(<r2>)1/2 6.649