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

using model chemistry: B3LYP/3-21G

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/3-21G
 hartrees
Energy at 0K-151.970911
Energy at 298.15K-151.974232
HF Energy-151.970911
Counterpoise corrected energy-75.973915
CP Energy at 298.15K-75.977007
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy37.236022
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/3-21G
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' 3514 3390 22.43      
2 A' 3453 3332 0.85      
3 A' 3260 3146 333.00      
4 A' 1751 1689 41.67      
5 A' 1685 1626 58.49      
6 A' 556 537 43.75      
7 A' 297 287 179.62      
8 A' 210 203 275.68      
9 A" 3584 3459 9.71      
10 A" 889 858 153.63      
11 A" 233 224 131.52      
12 A" 90 87 98.11      

Unscaled Zero Point Vibrational Energy (zpe) 9761.0 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 9418.4 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/3-21G
ABC
6.30983 0.24240 0.24188

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.119 0.418 0.000
O2 0.007 1.420 0.000
O3 0.007 -1.329 0.000
H4 0.937 1.773 0.000
H5 -0.584 -1.457 0.791
H6 -0.584 -1.457 -0.791

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H11.00801.75061.58302.15312.1531
O21.00802.74890.99513.04173.0417
O31.75062.74893.23850.99580.9958
H41.58300.99513.23853.65703.6570
H52.15313.04170.99583.65701.5819
H62.15313.04170.99583.65701.5819

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 104.423 H1 O3 H5 99.569
H1 O3 H6 99.569 O2 H1 O3 169.981
H5 O3 H6 105.172
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.309      
2 O -0.712      
3 O -0.601      
4 H 0.297      
5 H 0.354      
6 H 0.354      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.496 -2.773 0.000 2.817
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -10.413 6.489 0.000
y 6.489 -13.601 0.000
z 0.000 0.000 -10.899
Traceless
 xyz
x 1.837 6.489 0.000
y 6.489 -2.945 0.000
z 0.000 0.000 1.108
Polar
3z2-r22.216
x2-y23.188
xy6.489
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.415 0.521 0.000
y 0.521 1.668 0.000
z 0.000 0.000 1.170


<r2> (average value of r2) Å2
<r2> 47.918
(<r2>)1/2 6.922