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

using model chemistry: B3LYP/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 B3LYP/6-31G*
 hartrees
Energy at 0K-152.830148
Energy at 298.15K 
HF Energy-152.830148
Counterpoise corrected energy-76.408946
CP Energy at 298.15K-76.411847
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy36.955266
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 B3LYP/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' 3813 3662 49.08      
2 A' 3720 3572 10.10      
3 A' 3623 3479 251.81      
4 A' 1740 1671 84.90      
5 A' 1710 1642 63.41      
6 A' 464 445 22.45      
7 A' 233 224 173.38      
8 A' 129 124 272.75      
9 A" 3835 3682 45.63      
10 A" 686 659 122.46      
11 A" 171 164 206.70      
12 A" 68i 65i 21.36      

Unscaled Zero Point Vibrational Energy (zpe) 10027.4 cm-1
Scaled (by 0.9603) Zero Point Vibrational Energy (zpe) 9629.3 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 B3LYP/6-31G*
ABC
6.66447 0.22545 0.22493

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.172 0.527 0.000
O2 0.005 1.489 0.000
O3 0.005 -1.401 0.000
H4 0.891 1.879 0.000
H5 -0.571 -1.557 0.766
H6 -0.571 -1.557 -0.766

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.97611.93541.53072.34162.3416
O20.97612.88990.96783.19353.1935
O31.93542.88993.39700.97060.9706
H41.53070.96783.39703.81163.8116
H52.34163.19350.97063.81161.5314
H62.34163.19350.97063.81161.5314

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 103.898 H1 O3 H5 102.224
H1 O3 H6 102.224 O2 H1 O3 165.222
H5 O3 H6 104.167
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.396      
2 O -0.835      
3 O -0.755      
4 H 0.376      
5 H 0.409      
6 H 0.409      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.316 -1.697 0.000 1.726
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -10.777 6.371 0.000
y 6.371 -14.186 0.000
z 0.000 0.000 -11.411
Traceless
 xyz
x 2.022 6.371 0.000
y 6.371 -3.092 0.000
z 0.000 0.000 1.070
Polar
3z2-r22.141
x2-y23.409
xy6.371
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.642 0.313 0.000
y 0.313 1.980 0.000
z 0.000 0.000 1.458


<r2> (average value of r2) Å2
<r2> 50.889
(<r2>)1/2 7.134