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All results from a given calculation for H2OH2CO (water formaldehyde dimer)

using model chemistry: MP2_cp_opt/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP2_cp_opt/6-31+G**
 hartrees
Energy at 0K-190.433317
Energy at 298.15K-190.436121
Nuclear repulsion energy 
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/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 3987 3750 125.51      
2 A 3804 3578 123.45      
3 A 3165 2977 61.77      
4 A 3065 2883 47.61      
5 A 1751 1647 51.35      
6 A 1643 1546 113.00      
7 A 1568 1475 18.96      
8 A 1292 1215 6.57      
9 A 1221 1148 6.85      
10 A 483 454 137.99      
11 A 342 322 142.75      
12 A 173 163 31.25      
13 A 165 155 0.31      
14 A 90 85 51.25      
15 A 83 78 194.88      

Unscaled Zero Point Vibrational Energy (zpe) 11415.5 cm-1
Scaled (by 0.9406) Zero Point Vibrational Energy (zpe) 10737.4 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/6-31+G**
ABC
1.27328 0.15987 0.14204

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2_cp_opt/6-31+G**

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.116 -0.452 -0.000
O2 1.855 0.175 -0.000
O3 -0.952 -0.689 -0.000
H4 2.657 -0.357 0.000
C5 -1.330 0.480 0.000
H6 -0.615 1.311 0.000
H7 -2.398 0.730 -0.000

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 H6 H7
H10.96862.08211.54352.61762.47133.7073
O20.96862.93680.96223.19902.71874.2883
O32.08212.93683.62451.22802.02792.0249
H41.54350.96223.62454.07343.67255.1698
C52.61763.19901.22804.07341.09601.0967
H62.47132.71872.02793.67251.09601.8747
H73.70734.28832.02495.16981.09671.8747

picture of water formaldehyde dimer state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 O2 H4 106.149 H1 O3 C5 101.378
O2 H1 O3 146.183 O3 C5 H6 121.417
O3 C5 H7 121.059 H6 C5 H7 117.525
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability