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

using model chemistry: PBEPBE/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 PBEPBE/aug-cc-pVTZ
 hartrees
Energy at 0K-152.768806
Energy at 298.15K-152.771618
HF Energy-152.768806
Counterpoise corrected energy-76.380337
CP Energy at 298.15K-76.383076
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy36.539218
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/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' 3770 3746 66.48      
2 A' 3689 3665 6.98      
3 A' 3529 3506 393.31      
4 A' 1610 1600 27.35      
5 A' 1591 1581 85.33      
6 A' 381 378 34.51      
7 A' 192 191 178.64      
8 A' 160 159 101.24      
9 A" 3790 3765 72.24      
10 A" 646 642 74.44      
11 A" 150 149 9.42      
12 A" 127 126 151.63      

Unscaled Zero Point Vibrational Energy (zpe) 9817.9 cm-1
Scaled (by 0.9935) Zero Point Vibrational Energy (zpe) 9754.1 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/aug-cc-pVTZ
ABC
6.91151 0.21704 0.21687

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.091 0.547 0.000
O2 0.007 1.522 0.000
O3 0.007 -1.416 0.000
H4 0.920 1.847 0.000
H5 -0.559 -1.619 0.765
H6 -0.559 -1.619 -0.765

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.97861.96451.54262.38702.3870
O20.97862.93770.96953.28173.2817
O31.96452.93773.38880.97300.9730
H41.54260.96953.38883.84583.8458
H52.38703.28170.97303.84581.5296
H62.38703.28170.97303.84581.5296

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 104.722 H1 O3 H5 103.490
H1 O3 H6 103.490 O2 H1 O3 172.639
H5 O3 H6 103.630
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.240      
2 O -0.396      
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
  -0.171 -2.447 0.000 2.453
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -12.120 6.094 0.000
y 6.094 -13.257 0.000
z 0.000 0.000 -12.407
Traceless
 xyz
x 0.711 6.094 0.000
y 6.094 -0.993 0.000
z 0.000 0.000 0.281
Polar
3z2-r20.563
x2-y21.136
xy6.094
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> 53.164
(<r2>)1/2 7.291