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

using model chemistry: PBEPBEultrafine_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 PBEPBEultrafine_cp_opt/3-21G
 hartrees
Energy at 0K-189.623310
Energy at 298.15K-189.626212
Nuclear repulsion energy30.519121
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 PBEPBEultrafine_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 3417 3386 9.75      
2 A 3211 3182 152.70      
3 A 2901 2874 126.91      
4 A 2841 2815 52.77      
5 A 1693 1677 10.15      
6 A 1679 1664 67.06      
7 A 1517 1503 20.35      
8 A 1241 1230 3.97      
9 A 1183 1172 9.00      
10 A 544 539 192.74      
11 A 375 372 117.92      
12 A 194 192 7.18      
13 A 183 181 26.74      
14 A 83 82 116.32      
15 A 70 69 51.62      

Unscaled Zero Point Vibrational Energy (zpe) 10565.5 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 10469.3 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 PBEPBEultrafine_cp_opt/3-21G
ABC
1.22922 0.16180 0.14355

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.017 -0.387 -0.069
O2 1.858 0.182 -0.056
O3 -0.918 -0.698 -0.013
H4 2.522 -0.405 0.420
C5 -1.332 0.473 0.021
H6 -0.646 1.350 0.057
H7 -2.417 0.729 0.019

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 H6 H7
H11.01541.96111.58272.50342.40753.6118
O21.01542.91291.00593.20452.76514.3107
O31.96112.91293.48031.24252.06662.0691
H41.58271.00593.48033.97323.63945.0834
C52.50343.20451.24253.97321.11371.1145
H62.40752.76512.06663.63941.11371.8774
H73.61184.31072.06915.08341.11451.8774

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 103.073 H1 O3 C5 100.370
O2 H1 O3 154.953 O3 C5 H6 122.497
O3 C5 H7 122.681 H6 C5 H7 114.822
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine_cp_opt/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.000      
2 O 0.000      
3 O -0.349      
4 H 0.000      
5 C 0.008      
6 H 0.171      
7 H 0.170      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.664 0.106 0.886 1.888
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.950 -0.094 -0.049
y -0.094 2.514 -0.015
z -0.049 -0.015 0.796


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000