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

using model chemistry: CCSD(T)_cp_opt/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCSD(T)_cp_opt/6-31+G**
 hartrees
Energy at 0K-76.030309
Energy at 298.15K-76.032874
HF Energy-76.030309
Nuclear repulsion energy9.129821
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 CCSD(T)_cp_opt/6-31+G**
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' 3963 3803        
2 A' 3857 3701        
3 A' 3815 3661        
4 A' 1666 1598        
5 A' 1648 1582        
6 A' 325 312        
7 A' 167 160        
8 A' 128 123        
9 A" 3984 3823        
10 A" 581 558        
11 A" 146 140        
12 A" 102 98        

Unscaled Zero Point Vibrational Energy (zpe) 10191.3 cm-1
Scaled (by 0.9596) Zero Point Vibrational Energy (zpe) 9779.5 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 CCSD(T)_cp_opt/6-31+G**
ABC
7.40652 0.19800 0.19776

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.068 0.616 0.000
O2 -0.005 1.581 0.000
O3 -0.005 -1.442 0.000
H4 0.901 1.907 0.000
H5 -0.448 -1.820 0.768
H6 -0.448 -1.820 -0.768

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.96782.05901.53612.60542.6054
O20.96783.02270.96253.51433.5143
O32.05903.02273.46880.96380.9638
H41.53610.96253.46884.03664.0366
H52.60543.51430.96384.03661.5360
H62.60543.51430.96384.03661.5360

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 105.452 H1 O3 H5 114.091
H1 O3 H6 114.091 O2 H1 O3 173.640
H5 O3 H6 105.662
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability