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

using model chemistry: PBEPBE/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-152.707863
Energy at 298.15K-152.710870
HF Energy-152.707863
Counterpoise corrected energy-76.348609
CP Energy at 298.15K-76.351421
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy36.637909
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/6-31+G**
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' 3799 3756 74.82      
2 A' 3710 3668 10.41      
3 A' 3551 3510 397.12      
4 A' 1599 1581 33.73      
5 A' 1582 1564 117.56      
6 A' 410 405 82.11      
7 A' 214 212 185.27      
8 A' 178 176 132.07      
9 A" 3829 3785 76.93      
10 A" 705 697 151.80      
11 A" 186 184 17.08      
12 A" 148 146 195.50      

Unscaled Zero Point Vibrational Energy (zpe) 9955.4 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 9841.9 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 PBEPBE/6-31+G**
ABC
7.04873 0.22030 0.22024

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.145 0.538 0.000
O2 0.005 1.510 0.000
O3 0.005 -1.415 0.000
H4 0.896 1.898 0.000
H5 -0.561 -1.599 0.773
H6 -0.561 -1.599 -0.773

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.98191.95751.55392.37932.3793
O20.98192.92420.97233.25263.2526
O31.95752.92423.43070.97560.9756
H41.55390.97233.43073.86643.8664
H52.37933.25260.97563.86641.5466
H62.37933.25260.97563.86641.5466

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 105.347 H1 O3 H5 103.286
H1 O3 H6 103.286 O2 H1 O3 167.673
H5 O3 H6 104.868
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.416      
2 O -0.756      
3 O -0.755      
4 H 0.343      
5 H 0.376      
6 H 0.376      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.016 -2.930 0.000 2.930
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -12.252 6.891 0.000
y 6.891 -12.854 0.000
z 0.000 0.000 -12.405
Traceless
 xyz
x 0.377 6.891 0.000
y 6.891 -0.525 0.000
z 0.000 0.000 0.148
Polar
3z2-r20.296
x2-y20.602
xy6.891
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.150 0.144 0.000
y 0.144 2.888 0.000
z 0.000 0.000 2.290


<r2> (average value of r2) Å2
<r2> 52.583
(<r2>)1/2 7.251