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

using model chemistry: LSDA/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 LSDA/3-21G
 hartrees
Energy at 0K-151.248081
Energy at 298.15K 
HF Energy-151.248081
Nuclear repulsion energy40.242567
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 LSDA/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' 3502 3445 5.02      
2 A' 3333 3278 2.83      
3 A' 3101 3050 257.91      
4 A' 1652 1625 72.77      
5 A' 1615 1589 64.68      
6 A' 847 833 159.74      
7 A' 507 498 377.56      
8 A' 273 268 254.14      
9 A" 3417 3361 7.96      
10 A" 1040 1023 65.43      
11 A" 259 254 303.26      
12 A" 343i 338i 12.43      

Unscaled Zero Point Vibrational Energy (zpe) 9600.1 cm-1
Scaled (by 0.9836) Zero Point Vibrational Energy (zpe) 9442.7 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 LSDA/3-21G
ABC
7.44180 0.32211 0.32125

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.168 0.464 0.000
O2 0.004 1.455 0.000
O3 0.004 -1.368 0.000
H4 0.906 1.880 0.000
H5 -0.573 -1.520 0.802
H6 -0.573 -1.520 -0.802

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H11.00501.83961.59672.26432.2643
O21.00502.82380.99663.13483.1348
O31.83962.82383.37120.99980.9998
H41.59670.99663.37123.79313.7931
H52.26433.13480.99983.79311.6046
H62.26433.13480.99983.79311.6046

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 105.827 H1 O3 H5 101.659
H1 O3 H6 101.659 O2 H1 O3 165.489
H5 O3 H6 106.732
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.304      
2 O -0.712      
3 O -0.608      
4 H 0.332      
5 H 0.342      
6 H 0.342      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.299 1.207 0.000 1.243
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.597 3.870 0.000
y 3.870 -13.740 0.000
z 0.000 0.000 -11.287
Traceless
 xyz
x 0.916 3.870 0.000
y 3.870 -2.298 0.000
z 0.000 0.000 1.382
Polar
3z2-r22.763
x2-y22.143
xy3.870
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.213 0.260 0.000
y 0.260 2.478 0.000
z 0.000 0.000 1.175


<r2> (average value of r2) Å2
<r2> 38.221
(<r2>)1/2 6.182