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

using model chemistry: PBEPBEultrafine/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-152.768808
Energy at 298.15K-152.771662
HF Energy-152.768808
Counterpoise corrected energy-152.768717
CP Energy at 298.15K-152.771560
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy36.538096
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/aug-cc-pVTZ
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' 3769 3726 66.23      
2 A' 3690 3648 7.01      
3 A' 3527 3488 393.77      
4 A' 1611 1592 27.09      
5 A' 1592 1574 85.64      
6 A' 382 378 35.89      
7 A' 197 195 213.91      
8 A' 164 162 64.03      
9 A" 3790 3748 72.32      
10 A" 645 638 74.53      
11 A" 163 161 0.20      
12 A" 131 129 160.72      

Unscaled Zero Point Vibrational Energy (zpe) 9829.8 cm-1
Scaled (by 0.9888) Zero Point Vibrational Energy (zpe) 9719.7 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/aug-cc-pVTZ
ABC
6.91494 0.21700 0.21684

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.089 0.547 0.000
O2 0.007 1.522 0.000
O3 0.007 -1.416 0.000
H4 0.921 1.846 0.000
H5 -0.559 -1.620 0.765
H6 -0.559 -1.620 -0.765

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.97851.96451.54252.38732.3873
O20.97852.93790.96953.28263.2826
O31.96452.93793.38750.97300.9730
H41.54250.96953.38753.84533.8453
H52.38733.28260.97303.84531.5294
H62.38733.28260.97303.84531.5294

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 104.719 H1 O3 H5 103.508
H1 O3 H6 103.508 O2 H1 O3 172.795
H5 O3 H6 103.610
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.240      
2 O -0.395      
3 O -0.335      
4 H 0.145      
5 H 0.173      
6 H 0.173      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.170 -2.459 0.000 2.465
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -12.124 6.091 0.000
y 6.091 -13.245 0.000
z 0.000 0.000 -12.407
Traceless
 xyz
x 0.702 6.091 0.000
y 6.091 -0.980 0.000
z 0.000 0.000 0.278
Polar
3z2-r20.556
x2-y21.122
xy6.091
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.960 0.160 0.000
y 0.160 3.581 0.000
z 0.000 0.000 3.014


<r2> (average value of r2) Å2
<r2> 53.171
(<r2>)1/2 7.292