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

using model chemistry: HF/aug-cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/aug-cc-pVQZ
 hartrees
Energy at 0K-152.139292
Energy at 298.15K-152.141822
HF Energy-152.139292
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy36.142345
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 HF/aug-cc-pVQZ
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' 4208 3823 134.38      
2 A' 4124 3746 20.42      
3 A' 4081 3707 191.50      
4 A' 1768 1606 75.41      
5 A' 1751 1591 103.29      
6 A' 307 279 97.59      
7 A' 152 138 171.63      
8 A' 131 119 102.34      
9 A" 4221 3835 112.76      
10 A" 556 505 152.84      
11 A" 139 127 90.36      
12 A" 114 104 77.13      

Unscaled Zero Point Vibrational Energy (zpe) 10776.4 cm-1
Scaled (by 0.9085) Zero Point Vibrational Energy (zpe) 9790.3 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 HF/aug-cc-pVQZ
ABC
7.99114 0.19606 0.19564

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.168 0.559 0.000
O2 0.004 1.491 0.000
O3 0.004 -1.405 0.000
H4 0.850 1.899 0.000
H5 -0.542 -1.573 0.749
H6 -0.542 -1.573 -0.749

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.94661.97111.50322.36922.3692
O20.94662.89650.93883.20193.2019
O31.97112.89653.41080.94190.9419
H41.50320.93883.41083.81523.8152
H52.36923.20190.94193.81521.4979
H62.36923.20190.94193.81521.4979

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 105.744 H1 O3 H5 103.083
H1 O3 H6 103.083 O2 H1 O3 165.220
H5 O3 H6 105.334
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/aug-cc-pVQZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.267      
2 O -0.571      
3 O -0.557      
4 H 0.285      
5 H 0.288      
6 H 0.288      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.258 -2.969 0.000 2.980
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -12.089 6.110 0.000
y 6.110 -10.760 0.000
z 0.000 0.000 -11.677
Traceless
 xyz
x -0.870 6.110 0.000
y 6.110 1.123 0.000
z 0.000 0.000 -0.253
Polar
3z2-r2-0.505
x2-y2-1.329
xy6.110
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.344 0.121 0.000
y 0.121 2.667 0.000
z 0.000 0.000 2.382


<r2> (average value of r2) Å2
<r2> 57.315
(<r2>)1/2 7.571