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

using model chemistry: PBE1PBE/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 PBE1PBE/6-31G*
 hartrees
Energy at 0K-190.705007
Energy at 298.15K-190.708329
HF Energy-190.705007
Nuclear repulsion energy69.538120
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 PBE1PBE/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 3885 3692 66.73      
2 A 3718 3534 143.89      
3 A 3074 2921 60.72      
4 A 2983 2835 67.29      
5 A 1852 1760 93.87      
6 A 1745 1658 72.69      
7 A 1545 1468 12.64      
8 A 1285 1221 5.72      
9 A 1221 1161 3.50      
10 A 624 593 251.69      
11 A 333 317 74.16      
12 A 241 229 53.74      
13 A 208 197 34.76      
14 A 184 175 93.40      
15 A 157 149 32.80      

Unscaled Zero Point Vibrational Energy (zpe) 11527.0 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 10954.1 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 PBE1PBE/6-31G*
ABC
1.23445 0.17594 0.15604

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.028 -0.480 -0.133
O2 1.795 0.116 -0.094
O3 -0.937 -0.680 -0.001
H4 2.194 -0.079 0.762
C5 -1.226 0.494 0.014
H6 -0.448 1.278 0.003
H7 -2.282 0.826 0.039

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 H6 H7
H10.97191.97971.52372.46042.30043.5626
O20.97192.84660.96453.04622.52824.1398
O31.97972.84663.27841.20882.01772.0192
H41.52370.96453.27843.54793.06634.6234
C52.46043.04621.20883.54791.10431.1068
H62.30042.52822.01773.06631.10431.8883
H73.56264.13982.01924.62341.10681.8883

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 103.794 H1 O3 C5 98.084
O2 H1 O3 147.334 O3 C5 H6 121.384
O3 C5 H7 121.320 H6 C5 H7 117.297
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.423      
2 O -0.840      
3 O -0.353      
4 H 0.396      
5 C 0.035      
6 H 0.181      
7 H 0.157      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.519 0.984 1.472 2.333
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.925 -4.245 3.630
y -4.245 -18.359 -0.024
z 3.630 -0.024 -17.063
Traceless
 xyz
x -0.214 -4.245 3.630
y -4.245 -0.865 -0.024
z 3.630 -0.024 1.079
Polar
3z2-r22.158
x2-y20.434
xy-4.245
xz3.630
yz-0.024


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.553 -0.269 0.188
y -0.269 3.127 -0.047
z 0.188 -0.047 1.779


<r2> (average value of r2) Å2
<r2> 72.686
(<r2>)1/2 8.526