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

using model chemistry: MP2_cp_opt/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2_cp_opt/aug-cc-pVTZ
 hartrees
Energy at 0K-76.060246
Energy at 298.15K-76.062936
HF Energy-76.060246
Nuclear repulsion energy9.147764
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 MP2_cp_opt/aug-cc-pVTZ
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' 3916 3721 117.32      
2 A' 3815 3624 11.20      
3 A' 3727 3541 271.12      
4 A' 1648 1566 36.89      
5 A' 1629 1548 87.17      
6 A' 344 327 55.07      
7 A' 178 169 137.29      
8 A' 146 139 138.63      
9 A" 3936 3739 96.53      
10 A" 608 578 94.49      
11 A" 144 136 88.72      
12 A" 121 115 77.85      

Unscaled Zero Point Vibrational Energy (zpe) 10106.4 cm-1
Scaled (by 0.95) Zero Point Vibrational Energy (zpe) 9601.0 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 MP2_cp_opt/aug-cc-pVTZ
ABC
7.27756 0.21047 0.21043

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2_cp_opt/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.092 0.568 0.000
O2 -0.001 1.532 0.000
O3 -0.001 -1.401 0.000
H4 0.901 1.860 0.000
H5 -0.485 -1.737 0.761
H6 -0.485 -1.737 -0.761

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.96831.97141.52442.49492.4949
O20.96832.93290.96043.39073.3907
O31.97142.93293.38360.96210.9621
H41.52440.96043.38363.92913.9291
H52.49493.39070.96213.92911.5217
H62.49493.39070.96213.92911.5217

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 104.438 H1 O3 H5 111.862
H1 O3 H6 111.862 O2 H1 O3 171.751
H5 O3 H6 104.519
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability