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

using model chemistry: PBEPBEultrafine/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBEPBEultrafine/6-311G*
 hartrees
Energy at 0K-152.707973
Energy at 298.15K 
HF Energy-152.707973
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy37.168724
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 PBEPBEultrafine/6-311G*
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' 3736 3697 25.36      
2 A' 3656 3618 1.00      
3 A' 3486 3450 283.56      
4 A' 1702 1684 72.19      
5 A' 1683 1665 89.46      
6 A' 477 472 50.32      
7 A' 236 234 77.01      
8 A' 124 123 384.68      
9 A" 3771 3731 29.46      
10 A" 761 754 151.51      
11 A" 199 197 216.31      
12 A" 115i 114i 31.79      

Unscaled Zero Point Vibrational Energy (zpe) 9858.1 cm-1
Scaled (by 0.9896) Zero Point Vibrational Energy (zpe) 9755.6 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 PBEPBEultrafine/6-311G*
ABC
6.69577 0.23152 0.23122

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.100 0.531 0.000
O2 0.006 1.504 0.000
O3 0.006 -1.404 0.000
H4 0.912 1.852 0.000
H5 -0.554 -1.593 0.775
H6 -0.554 -1.593 -0.775

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.97791.93681.55032.35302.3530
O20.97792.90780.97063.24073.2407
O31.93682.90783.37910.97410.9741
H41.55030.97063.37913.82243.8224
H52.35303.24070.97413.82241.5495
H62.35303.24070.97413.82241.5495

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 105.433 H1 O3 H5 102.806
H1 O3 H6 102.806 O2 H1 O3 171.653
H5 O3 H6 105.367
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.396      
2 O -0.838      
3 O -0.772      
4 H 0.379      
5 H 0.417      
6 H 0.417      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.306 -2.178 0.000 2.199
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.177 6.865 0.000
y 6.865 -14.053 0.000
z 0.000 0.000 -11.620
Traceless
 xyz
x 1.659 6.865 0.000
y 6.865 -2.654 0.000
z 0.000 0.000 0.995
Polar
3z2-r21.991
x2-y22.875
xy6.865
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.720 0.402 0.000
y 0.402 2.258 0.000
z 0.000 0.000 1.642


<r2> (average value of r2) Å2
<r2> 50.048
(<r2>)1/2 7.074