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

using model chemistry: PBEPBE/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 PBEPBE/6-31G
 hartrees
Energy at 0K-152.616354
Energy at 298.15K-152.619272
HF Energy-152.616354
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy37.107633
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/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 3685 3634 29.99      
2 A 3626 3576 31.48      
3 A 3524 3476 0.27      
4 A 3306 3260 355.47      
5 A 1626 1604 45.21      
6 A 1592 1571 90.03      
7 A 791 780 210.74      
8 A 471 464 66.71      
9 A 243 239 44.86      
10 A 169 167 232.51      
11 A 149 147 429.85      
12 A 65 64 22.52      

Unscaled Zero Point Vibrational Energy (zpe) 9623.5 cm-1
Scaled (by 0.9862) Zero Point Vibrational Energy (zpe) 9490.7 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 PBEPBE/6-31G
ABC
6.76693 0.23601 0.23576

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.153 0.516 0.000
O2 0.004 1.498 0.000
O3 0.004 -1.411 0.000
H4 0.882 1.945 0.000
H5 -0.548 -1.582 0.801
H6 -0.548 -1.582 -0.801

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.99341.93261.60352.35332.3533
O20.99342.90900.98493.23073.2307
O31.93262.90903.46820.98830.9883
H41.60350.98493.46823.88923.8892
H52.35333.23070.98833.88921.6028
H62.35333.23070.98833.88921.6028

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 108.299 H1 O3 H5 102.492
H1 O3 H6 102.492 O2 H1 O3 166.926
H5 O3 H6 108.372
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.371      
2 O -0.778      
3 O -0.687      
4 H 0.333      
5 H 0.381      
6 H 0.381      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -3.091 -0.002 -0.029 3.091
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.300 -0.118 -7.164
y -0.118 -11.286 -0.015
z -7.164 -0.015 -12.626
Traceless
 xyz
x 0.656 -0.118 -7.164
y -0.118 0.677 -0.015
z -7.164 -0.015 -1.333
Polar
3z2-r2-2.666
x2-y2-0.014
xy-0.118
xz-7.164
yz-0.015


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.036 0.000 -0.490
y 0.000 1.303 0.005
z -0.490 0.005 1.380


<r2> (average value of r2) Å2
<r2> 49.262
(<r2>)1/2 7.019