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

using model chemistry: CCSD(T)/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)/6-31G*
 hartrees
Energy at 0K-190.409021
Energy at 298.15K-190.412181
HF Energy-189.881337
Counterpoise corrected energy-190.404929
CP Energy at 298.15K-190.407580
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy68.417873
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)/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 3831 3686        
2 A 3702 3561        
3 A 3087 2970        
4 A 2992 2878        
5 A 1769 1702        
6 A 1761 1694        
7 A 1553 1494        
8 A 1289 1240        
9 A 1201 1155        
10 A 570 548        
11 A 325 312        
12 A 224 215        
13 A 194 187        
14 A 149 143        
15 A 144 139        

Unscaled Zero Point Vibrational Energy (zpe) 11394.4 cm-1
Scaled (by 0.9621) Zero Point Vibrational Energy (zpe) 10962.6 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 CCSD(T)/6-31G*
ABC
1.21010 0.16724 0.14857

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.069 -0.484 -0.074
O2 1.835 0.119 -0.096
O3 -0.971 -0.689 -0.003
H4 2.331 -0.099 0.710
C5 -1.255 0.503 0.017
H6 -0.474 1.282 0.033
H7 -2.308 0.842 0.018

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 H6 H7
H10.97522.05071.53462.52662.34743.6289
O20.97522.92070.97073.11562.58814.2068
O32.05072.92073.42841.22572.03252.0324
H41.53460.97073.42843.70113.19794.7832
C52.52663.11561.22573.70111.10311.1060
H62.34742.58812.03253.19791.10311.8865
H73.62894.20682.03244.78321.10601.8865

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 104.117 H1 O3 C5 97.726
O2 H1 O3 147.513 O3 C5 H6 121.486
O3 C5 H7 121.220 H6 C5 H7 117.294
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability