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

using model chemistry: MP2/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP2/6-31G*
 hartrees
Energy at 0K-190.375649
Energy at 298.15K-190.378885
HF Energy-189.881550
Counterpoise corrected energy-190.371381
CP Energy at 298.15K-190.374128
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy68.571310
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 MP2/6-31G*
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 3881 3659 89.54      
2 A 3725 3513 97.82      
3 A 3150 2970 58.51      
4 A 3049 2875 54.27      
5 A 1764 1664 30.43      
6 A 1760 1659 97.27      
7 A 1572 1483 10.85      
8 A 1300 1226 4.73      
9 A 1227 1158 4.56      
10 A 589 556 247.85      
11 A 332 313 86.39      
12 A 228 215 41.21      
13 A 197 186 35.20      
14 A 167 158 114.02      
15 A 152 144 33.10      

Unscaled Zero Point Vibrational Energy (zpe) 11546.6 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 10888.4 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 MP2/6-31G*
ABC
1.20836 0.16861 0.14972

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.055 -0.460 -0.170
O2 1.826 0.132 -0.085
O3 -0.940 -0.688 -0.006
H4 2.256 -0.159 0.733
C5 -1.261 0.494 0.018
H6 -0.510 1.297 -0.004
H7 -2.319 0.801 0.060

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 H6 H7
H10.97522.01521.53202.51152.35863.6094
O20.97522.88600.96873.10932.61134.2010
O32.01522.88603.32251.22442.03092.0303
H41.53200.96873.32253.64733.21114.7227
C52.51153.10931.22443.64731.09981.1029
H62.35862.61132.03093.21111.09981.8771
H73.60944.20102.03034.72271.10291.8771

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 104.015 H1 O3 C5 98.714
O2 H1 O3 147.558 O3 C5 H6 121.715
O3 C5 H7 121.384 H6 C5 H7 116.901
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability