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

using model chemistry: PBEPBE_cp_opt/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 PBEPBE_cp_opt/3-21G
 hartrees
Energy at 0K-189.623310
Energy at 298.15K-189.626264
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 PBEPBE_cp_opt/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 3419 3388 9.72      
2 A 3213 3184 153.07      
3 A 2901 2874 127.84      
4 A 2841 2815 52.03      
5 A 1693 1677 9.61      
6 A 1679 1664 67.49      
7 A 1517 1503 20.52      
8 A 1241 1230 3.99      
9 A 1184 1173 9.00      
10 A 538 534 192.98      
11 A 373 370 117.49      
12 A 197 195 7.28      
13 A 183 181 27.64      
14 A 108 107 129.74      
15 A 74 73 37.22      

Unscaled Zero Point Vibrational Energy (zpe) 10580.1 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 10483.9 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 PBEPBE_cp_opt/3-21G
ABC
1.23000 0.16172 0.14349

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.017 -0.386 -0.069
O2 1.859 0.182 -0.056
O3 -0.918 -0.698 -0.013
H4 2.523 -0.406 0.418
C5 -1.333 0.473 0.021
H6 -0.648 1.350 0.056
H7 -2.418 0.727 0.020

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 H6 H7
H11.01541.96091.58262.50402.40893.6124
O21.01542.91291.00593.20582.76744.3120
O31.96092.91293.48031.24252.06672.0691
H41.58261.00593.48033.97513.64295.0853
C52.50403.20581.24253.97511.11371.1145
H62.40892.76742.06673.64291.11371.8773
H73.61244.31202.06915.08531.11451.8773

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 103.068 H1 O3 C5 100.419
O2 H1 O3 154.999 O3 C5 H6 122.503
O3 C5 H7 122.683 H6 C5 H7 114.814
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability