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

using model chemistry: CCSD(T)_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 CCSD(T)_cp_opt/6-31G*
 hartrees
Energy at 0K-190.404929
Energy at 298.15K-190.407580
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 CCSD(T)_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 3840 3694        
2 A 3709 3568        
3 A 3060 2944        
4 A 2980 2867        
5 A 1780 1713        
6 A 1764 1697        
7 A 1562 1502        
8 A 1291 1242        
9 A 1193 1148        
10 A 461 444        
11 A 329 317        
12 A 167 161        
13 A 154 149        
14 A 68 65        
15 A 60 58        

Unscaled Zero Point Vibrational Energy (zpe) 11208.8 cm-1
Scaled (by 0.9621) Zero Point Vibrational Energy (zpe) 10783.9 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 CCSD(T)_cp_opt/6-31G*
ABC
1.28849 0.15188 0.13587

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)_cp_opt/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.125 -0.392 -0.000
O2 1.911 0.184 -0.000
O3 -0.962 -0.685 0.000
H4 2.659 -0.434 0.000
C5 -1.373 0.468 0.000
H6 -0.686 1.334 0.000
H7 -2.456 0.696 -0.000

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 H6 H7
H10.97432.10751.53422.64272.50173.7432
O20.97433.00140.97003.29712.84034.3975
O32.10753.00143.62941.22392.03712.0347
H41.53420.97003.62944.13223.78335.2386
C52.64273.29711.22394.13221.10571.1065
H62.50172.84032.03713.78331.10571.8816
H73.74324.39752.03475.23861.10651.8816

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 104.198 H1 O3 C5 101.680
O2 H1 O3 151.753 O3 C5 H6 121.879
O3 C5 H7 121.569 H6 C5 H7 116.552
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability