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

using model chemistry: PBE1PBE/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 PBE1PBE/3-21G
 hartrees
Energy at 0K-151.808479
Energy at 298.15K-151.811862
HF Energy-151.808479
Nuclear repulsion energy37.581368
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 PBE1PBE/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' 3602 3460 19.56      
2 A' 3531 3391 0.00      
3 A' 3301 3171 388.96      
4 A' 1760 1690 49.58      
5 A' 1693 1626 68.52      
6 A' 577 554 39.54      
7 A' 309 297 194.99      
8 A' 210 201 308.81      
9 A" 3665 3519 19.64      
10 A" 923 887 163.14      
11 A" 231 222 151.73      
12 A" 104 100 96.68      

Unscaled Zero Point Vibrational Energy (zpe) 9953.2 cm-1
Scaled (by 0.9604) Zero Point Vibrational Energy (zpe) 9559.0 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 PBE1PBE/3-21G
ABC
6.39833 0.24870 0.24825

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.136 0.402 0.000
O2 0.007 1.399 0.000
O3 0.007 -1.314 0.000
H4 0.920 1.778 0.000
H5 -0.581 -1.429 0.790
H6 -0.581 -1.429 -0.790

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H11.00521.72051.58372.11912.1191
O21.00522.71250.98932.99432.9943
O31.72052.71253.22370.99110.9911
H41.58370.98933.22373.62793.6279
H52.11912.99430.99113.62791.5792
H62.11912.99430.99113.62791.5792

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 105.124 H1 O3 H5 99.248
H1 O3 H6 99.248 O2 H1 O3 168.287
H5 O3 H6 105.633
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.328      
2 O -0.746      
3 O -0.634      
4 H 0.313      
5 H 0.370      
6 H 0.370      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.479 -2.708 0.000 2.750
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -10.395 6.617 0.000
y 6.617 -13.559 0.000
z 0.000 0.000 -10.839
Traceless
 xyz
x 1.804 6.617 0.000
y 6.617 -2.942 0.000
z 0.000 0.000 1.138
Polar
3z2-r22.275
x2-y23.164
xy6.617
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.356 0.490 0.000
y 0.490 1.601 0.000
z 0.000 0.000 1.134


<r2> (average value of r2) Å2
<r2> 46.898
(<r2>)1/2 6.848