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

using model chemistry: QCISD(T)/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 QCISD(T)/6-31G*
 hartrees
Energy at 0K-152.426972
Energy at 298.15K-152.429759
HF Energy-152.028052
Nuclear repulsion energy36.323297
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 QCISD(T)/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' 3832 3676        
2 A' 3720 3569        
3 A' 3694 3544        
4 A' 1773 1700        
5 A' 1738 1668        
6 A' 420 403        
7 A' 206 197        
8 A' 142 136        
9 A" 3841 3685        
10 A" 653 627        
11 A" 161 154        
12 A" 94 90        

Unscaled Zero Point Vibrational Energy (zpe) 10136.9 cm-1
Scaled (by 0.9593) Zero Point Vibrational Energy (zpe) 9724.3 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 QCISD(T)/6-31G*
ABC
6.66851 0.21206 0.21165

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.148 0.550 0.000
O2 0.006 1.515 0.000
O3 0.006 -1.428 0.000
H4 0.903 1.885 0.000
H5 -0.575 -1.565 0.767
H6 -0.575 -1.565 -0.767

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.97561.98281.53392.36342.3634
O20.97562.94290.97013.22723.2272
O31.98282.94293.43240.97250.9725
H41.53390.97013.43243.83143.8314
H52.36343.22720.97253.83141.5344
H62.36343.22720.97253.83141.5344

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 104.064 H1 O3 H5 100.582
H1 O3 H6 100.582 O2 H1 O3 167.514
H5 O3 H6 104.163
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability