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

using model chemistry: MP2/aug-cc-pVQZ

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/aug-cc-pVQZ
 hartrees
Energy at 0K-152.711953
Energy at 298.15K-152.714688
HF Energy-152.137254
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy36.615911
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/aug-cc-pVQZ
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' 3933 3735 116.46      
2 A' 3832 3639 11.93      
3 A' 3735 3547 293.57      
4 A' 1653 1570 36.45      
5 A' 1634 1551 89.78      
6 A' 355 337 52.86      
7 A' 183 174 130.84      
8 A' 152 144 152.51      
9 A" 3953 3754 100.23      
10 A" 625 593 93.97      
11 A" 147 139 86.41      
12 A" 124 118 82.65      

Unscaled Zero Point Vibrational Energy (zpe) 10161.8 cm-1
Scaled (by 0.9497) Zero Point Vibrational Energy (zpe) 9650.7 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/aug-cc-pVQZ
ABC
7.29895 0.21407 0.21402

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pVQZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.096 0.557 0.000
O2 -0.001 1.518 0.000
O3 -0.001 -1.390 0.000
H4 0.897 1.852 0.000
H5 -0.488 -1.717 0.760
H6 -0.488 -1.717 -0.760

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.96621.94921.52272.46782.4678
O20.96622.90800.95793.35893.3589
O31.94922.90803.36420.95970.9597
H41.52270.95793.36423.90323.9032
H52.46783.35890.95973.90321.5194
H62.46783.35890.95973.90321.5194

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 104.627 H1 O3 H5 111.472
H1 O3 H6 111.472 O2 H1 O3 171.348
H5 O3 H6 104.671
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability