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

using model chemistry: B3PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-152.774249
Energy at 298.15K-152.777138
HF Energy-152.774249
Nuclear repulsion energy36.936063
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 B3PW91/6-31G*
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' 3857 3690 53.01      
2 A' 3763 3601 13.30      
3 A' 3647 3489 290.77      
4 A' 1745 1669 78.01      
5 A' 1712 1638 80.20      
6 A' 456 436 35.96      
7 A' 228 218 189.41      
8 A' 155 149 228.64      
9 A" 3883 3714 55.37      
10 A" 695 665 136.25      
11 A" 178 171 182.63      
12 A" 77 73 44.77      

Unscaled Zero Point Vibrational Energy (zpe) 10198.0 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 9756.4 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 B3PW91/6-31G*
ABC
6.68576 0.22413 0.22362

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.160 0.508 0.000
O2 0.007 1.471 0.000
O3 0.007 -1.394 0.000
H4 0.895 1.848 0.000
H5 -0.581 -1.486 0.763
H6 -0.581 -1.486 -0.763

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.97561.90841.52922.25972.2597
O20.97562.86580.96533.11023.1102
O31.90842.86583.36240.96780.9678
H41.52920.96533.36243.72553.7255
H52.25973.11020.96783.72551.5269
H62.25973.11020.96783.72551.5269

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 103.970 H1 O3 H5 98.211
H1 O3 H6 98.211 O2 H1 O3 166.381
H5 O3 H6 104.163
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.412      
2 O -0.858      
3 O -0.781      
4 H 0.387      
5 H 0.420      
6 H 0.420      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.346 -2.084 0.000 2.112
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -10.695 6.577 0.000
y 6.577 -13.884 0.000
z 0.000 0.000 -11.346
Traceless
 xyz
x 1.920 6.577 0.000
y 6.577 -2.863 0.000
z 0.000 0.000 0.944
Polar
3z2-r21.887
x2-y23.189
xy6.577
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.613 0.319 0.000
y 0.319 1.933 0.000
z 0.000 0.000 1.434


<r2> (average value of r2) Å2
<r2> 51.113
(<r2>)1/2 7.149