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

using model chemistry: PBEPBE_cp_opt/6-311+G(3df,2pd)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at PBEPBE_cp_opt/6-311+G(3df,2pd)
 hartrees
Energy at 0K-190.800427
Energy at 298.15K-190.803187
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 PBEPBE_cp_opt/6-311+G(3df,2pd)
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 3804 3766 77.22      
2 A 3581 3545 300.34      
3 A 2902 2873 72.53      
4 A 2831 2803 72.37      
5 A 1749 1732 90.09      
6 A 1609 1593 75.40      
7 A 1479 1464 17.97      
8 A 1230 1218 6.62      
9 A 1161 1149 6.85      
10 A 519 514 80.05      
11 A 364 361 110.09      
12 A 179 178 31.30      
13 A 167 166 0.04      
14 A 77 76 37.41      
15 A 43 42 132.47      

Unscaled Zero Point Vibrational Energy (zpe) 10847.5 cm-1
Scaled (by 0.99) Zero Point Vibrational Energy (zpe) 10739.0 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 PBEPBE_cp_opt/6-311+G(3df,2pd)
ABC
1.33631 0.16178 0.14439

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE_cp_opt/6-311+G(3df,2pd)

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.056 -0.383 -0.010
O2 1.850 0.188 -0.023
O3 -0.895 -0.673 -0.005
H4 2.589 -0.411 0.154
C5 -1.354 0.450 0.009
H6 -0.699 1.349 0.031
H7 -2.455 0.625 -0.001

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 H6 H7
H10.97811.97231.54202.54992.46543.6521
O20.97812.87690.96763.21512.80104.3268
O31.97232.87693.49731.21282.03162.0288
H41.54200.96763.49734.03863.73105.1511
C52.54993.21511.21284.03861.11331.1142
H62.46542.80102.03163.73101.11331.8998
H73.65214.32682.02885.15111.11421.8998

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 104.843 H1 O3 C5 103.795
O2 H1 O3 152.752 O3 C5 H6 121.655
O3 C5 H7 121.285 H6 C5 H7 117.060
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability