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

using model chemistry: MP2_cp_opt/3-21G

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/3-21G
 hartrees
Energy at 0K-189.153208
Energy at 298.15K-189.155675
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/3-21G
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 3657 3491 40.99      
2 A 3508 3348 59.74      
3 A 3075 2935 131.01      
4 A 3004 2867 31.61      
5 A 1752 1672 55.29      
6 A 1711 1633 17.81      
7 A 1530 1461 19.83      
8 A 1307 1248 9.05      
9 A 1228 1172 5.82      
10 A 467 446 228.88      
11 A 290 277 116.79      
12 A 144 138 11.67      
13 A 111 106 5.72      
14 A 74 70 132.97      
15 A 28 27 20.15      

Unscaled Zero Point Vibrational Energy (zpe) 10942.5 cm-1
Scaled (by 0.9545) Zero Point Vibrational Energy (zpe) 10444.6 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/3-21G
ABC
1.94490 0.11859 0.11177

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2_cp_opt/3-21G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -1.228 -0.069 -0.001
O2 -2.177 0.214 -0.000
O3 0.817 -0.535 -0.000
H4 -2.698 -0.625 0.001
C5 1.741 0.308 0.000
H6 1.558 1.391 0.000
H7 2.801 0.022 0.000

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 H6 H7
H10.99052.09641.57192.99283.14494.0299
O20.99053.08540.98803.91913.91544.9816
O32.09643.08543.51551.25142.06342.0613
H41.57190.98803.51554.53634.70915.5370
C52.99283.91911.25144.53631.09811.0979
H63.14493.91542.06344.70911.09811.8494
H74.02994.98162.06135.53701.09791.8494

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 105.210 H1 O3 C5 124.823
O2 H1 O3 176.197 O3 C5 H6 122.727
O3 C5 H7 122.533 H6 C5 H7 114.740
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability