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

using model chemistry: CCSD(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 CCSD(T)/6-31G*
 hartrees
Energy at 0K-152.426852
Energy at 298.15K-152.429644
HF Energy-152.028047
Counterpoise corrected energy-76.009560
CP Energy at 298.15K-76.012295
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy36.335922
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)/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' 3833 3687        
2 A' 3721 3580        
3 A' 3695 3555        
4 A' 1773 1706        
5 A' 1739 1673        
6 A' 422 406        
7 A' 207 199        
8 A' 144 138        
9 A" 3842 3696        
10 A" 654 629        
11 A" 160 154        
12 A" 93 89        

Unscaled Zero Point Vibrational Energy (zpe) 10141.5 cm-1
Scaled (by 0.9621) Zero Point Vibrational Energy (zpe) 9757.2 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)/6-31G*
ABC
6.66506 0.21232 0.21190

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.148 0.549 0.000
O2 0.006 1.514 0.000
O3 0.006 -1.427 0.000
H4 0.903 1.884 0.000
H5 -0.576 -1.562 0.767
H6 -0.576 -1.562 -0.767

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.97561.98131.53392.35982.3598
O20.97562.94140.97003.22333.2233
O31.98132.94143.43080.97250.9725
H41.53390.97003.43083.82793.8279
H52.35983.22330.97253.82791.5340
H62.35983.22330.97253.82791.5340

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 104.068 H1 O3 H5 100.426
H1 O3 H6 100.426 O2 H1 O3 167.523
H5 O3 H6 104.127
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability