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

using model chemistry: PBEPBE_cp_opt/3-21G

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_cp_opt/3-21G
 hartrees
Energy at 0K-75.886420
Energy at 298.15K-75.889495
HF Energy-75.886420
Nuclear repulsion energy8.756695
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_cp_opt/3-21G
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' 3393 3362 27.77      
2 A' 3339 3309 13.44      
3 A' 3103 3075 265.71      
4 A' 1710 1695 50.87      
5 A' 1655 1640 38.68      
6 A' 446 442 117.47      
7 A' 235 233 6.38      
8 A' 184 182 287.17      
9 A" 3485 3454 0.57      
10 A" 780 773 206.04      
11 A" 187 185 18.62      
12 A" 123 122 153.70      

Unscaled Zero Point Vibrational Energy (zpe) 9320.2 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 9235.4 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 PBEPBE_cp_opt/3-21G
ABC
6.76997 0.22668 0.22656

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE_cp_opt/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.010 0.467 0.000
O2 -0.005 1.490 0.000
O3 -0.005 -1.326 0.000
H4 0.975 1.722 0.000
H5 -0.455 -1.751 0.792
H6 -0.455 -1.751 -0.792

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H11.02391.79271.58372.39992.3999
O21.02392.81641.00683.36663.3666
O31.79272.81643.20161.00521.0052
H41.58371.00683.20163.83823.8382
H52.39993.36661.00523.83821.5840
H62.39993.36661.00523.83821.5840

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 102.498 H1 O3 H5 115.205
H1 O3 H6 115.205 O2 H1 O3 178.753
H5 O3 H6 103.974
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE_cp_opt/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.000      
2 O 0.000      
3 O -0.643      
4 H 0.000      
5 H 0.322      
6 H 0.322      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.082 -4.043 0.000 4.044
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -6.035 2.920 0.000
y 2.920 -2.150 0.000
z 0.000 0.000 -4.268
Traceless
 xyz
x -2.825 2.920 0.000
y 2.920 3.001 0.000
z 0.000 0.000 -0.176
Polar
3z2-r2-0.352
x2-y2-3.884
xy2.920
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.425 0.287 0.000
y 0.287 0.391 0.000
z 0.000 0.000 1.136


<r2> (average value of r2) Å2
<r2> 50.637
(<r2>)1/2 7.116