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

using model chemistry: MP2_cp_opt/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_cp_opt/6-31G*
 hartrees
Energy at 0K-190.371381
Energy at 298.15K-190.374128
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/6-31G*
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 3892 3670 93.87      
2 A 3735 3522 105.28      
3 A 3125 2947 93.24      
4 A 3038 2865 41.23      
5 A 1778 1677 24.57      
6 A 1761 1661 124.30      
7 A 1581 1491 11.60      
8 A 1303 1228 8.70      
9 A 1220 1150 4.12      
10 A 483 456 160.04      
11 A 349 329 134.48      
12 A 172 162 23.49      
13 A 162 153 0.53      
14 A 74 70 163.94      
15 A 72 68 42.19      

Unscaled Zero Point Vibrational Energy (zpe) 11371.5 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 10723.3 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/6-31G*
ABC
1.29222 0.15363 0.13731

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.108 -0.379 -0.000
O2 1.901 0.185 -0.000
O3 -0.950 -0.684 -0.000
H4 2.639 -0.441 0.000
C5 -1.370 0.466 0.000
H6 -0.692 1.334 0.000
H7 -2.450 0.686 0.000

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 H6 H7
H10.97332.08041.53242.61842.48463.7142
O20.97332.98050.96773.28332.83584.3800
O32.08042.98053.59731.22472.03452.0318
H41.53240.96773.59734.11073.77415.2126
C52.61843.28331.22474.11071.10151.1021
H62.48462.83582.03453.77411.10151.8741
H73.71424.38002.03185.21261.10211.8741

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 104.278 H1 O3 C5 101.643
O2 H1 O3 152.996 O3 C5 H6 121.902
O3 C5 H7 121.575 H6 C5 H7 116.523
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability