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

using model chemistry: QCISD(T)/TZVP

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)/TZVP
 hartrees
Energy at 0K-152.585007
Energy at 298.15K-152.587794
HF Energy-152.119175
Nuclear repulsion energy36.531525
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)/TZVP
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' 3911 3767        
2 A' 3827 3686        
3 A' 3767 3629        
4 A' 1665 1604        
5 A' 1638 1577        
6 A' 377 363        
7 A' 186 179        
8 A' 170 164        
9 A" 3932 3787        
10 A" 631 608        
11 A" 148 143        
12 A" 118 114        

Unscaled Zero Point Vibrational Energy (zpe) 10184.6 cm-1
Scaled (by 0.9632) Zero Point Vibrational Energy (zpe) 9809.8 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)/TZVP
ABC
7.43980 0.21320 0.21305

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.049 0.563 0.000
O2 -0.005 1.529 0.000
O3 -0.005 -1.381 0.000
H4 0.915 1.807 0.000
H5 -0.444 -1.778 0.759
H6 -0.444 -1.778 -0.759

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.96751.94431.51602.51002.5100
O20.96752.90960.96123.42153.4215
O31.94432.90963.31760.96280.9628
H41.51600.96123.31763.90863.9086
H52.51003.42150.96283.90861.5175
H62.51003.42150.96283.90861.5175

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 103.624 H1 O3 H5 115.177
H1 O3 H6 115.177 O2 H1 O3 175.246
H5 O3 H6 104.001
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability