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

using model chemistry: CCSD(T)_cp/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 CCSD(T)_cp/3-21G
 hartrees
Energy at 0K-189.175771
Energy at 298.15K-189.169466
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)/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 3564 3530        
2 A 3424 3392        
3 A 3081 3052        
4 A 2961 2933        
5 A 1750 1734        
6 A 1640 1625        
7 A 1507 1493        
8 A 1273 1261        
9 A 1205 1193        
10 A 683 676        
11 A 399 395        
12 A 323 320        
13 A 242 240        
14 A 235 233        
15 A 222 220        

Unscaled Zero Point Vibrational Energy (zpe) 11253.5 cm-1
Scaled (by 0.9906) Zero Point Vibrational Energy (zpe) 11147.7 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)/3-21G
ABC
1.12669 0.18755 0.16313

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.996 -0.578 -0.073
O2 1.730 0.093 -0.105
O3 -0.958 -0.704 0.007
H4 2.184 0.033 0.777
C5 -1.149 0.538 0.010
H6 -0.302 1.235 -0.007
H7 -2.162 0.971 0.025

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 H6 H7
H10.99541.95981.58332.41952.23113.5191
O20.99542.80610.99352.91522.33313.9920
O31.95982.80613.31781.25732.04712.0635
H41.58330.99353.31783.45652.87024.5090
C52.41952.91521.25733.45651.09611.1020
H62.23112.33312.04712.87021.09611.8784
H73.51913.99202.06354.50901.10201.8784

picture of water formaldehyde dimer state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability