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

using model chemistry: HF_cp_opt/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_cp_opt/6-31G*
 hartrees
Energy at 0K-76.010742
Energy at 298.15K-76.013445
HF Energy-76.010742
Nuclear repulsion energy9.280718
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_cp_opt/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 3739 104.82      
2 A' 4069 3656 24.94      
3 A' 4027 3618 190.08      
4 A' 1856 1668 106.93      
5 A' 1827 1642 120.17      
6 A' 352 317 139.38      
7 A' 177 159 153.81      
8 A' 144 130 179.03      
9 A" 4183 3759 84.97      
10 A" 617 554 235.06      
11 A" 153 137 39.83      
12 A" 125 112 159.65      

Unscaled Zero Point Vibrational Energy (zpe) 10845.8 cm-1
Scaled (by 0.8985) Zero Point Vibrational Energy (zpe) 9745.0 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_cp_opt/6-31G*
ABC
7.64563 0.20121 0.20096

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.026 0.621 0.000
O2 -0.005 1.573 0.000
O3 -0.005 -1.428 0.000
H4 0.900 1.851 0.000
H5 -0.425 -1.816 0.756
H6 -0.425 -1.816 -0.756

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.95192.04891.50862.59102.5910
O20.95193.00010.94663.49703.4970
O32.04893.00013.40110.94800.9480
H41.50860.94663.40113.97133.9713
H52.59103.49700.94803.97131.5124
H62.59103.49700.94803.97131.5124

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 105.234 H1 O3 H5 114.590
H1 O3 H6 114.590 O2 H1 O3 177.264
H5 O3 H6 105.811
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF_cp_opt/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.000      
2 O 0.000      
3 O -0.866      
4 H 0.000      
5 H 0.433      
6 H 0.433      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.110 -3.273 0.000 3.275
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -6.276 3.154 0.000
y 3.154 -2.171 0.000
z 0.000 0.000 -4.090
Traceless
 xyz
x -3.145 3.154 0.000
y 3.154 3.012 0.000
z 0.000 0.000 0.133
Polar
3z2-r20.267
x2-y2-4.105
xy3.154
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.573 0.149 0.000
y 0.149 0.550 0.000
z 0.000 0.000 0.993


<r2> (average value of r2) Å2
<r2> 55.789
(<r2>)1/2 7.469