return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: PBEPBEultrafine_cp/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 PBEPBEultrafine_cp/6-31G*
 hartrees
Energy at 0K-190.696206
Energy at 298.15K-190.689623
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 PBEPBEultrafine/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 3706 3645 44.87      
2 A 3526 3468 145.17      
3 A 2945 2896 64.48      
4 A 2862 2815 89.41      
5 A 1761 1732 77.46      
6 A 1703 1675 60.39      
7 A 1491 1467 13.28      
8 A 1240 1220 3.00      
9 A 1169 1150 3.75      
10 A 638 628 241.15      
11 A 339 333 58.62      
12 A 248 243 61.08      
13 A 208 204 72.72      
14 A 201 198 39.47      
15 A 166 164 23.31      

Unscaled Zero Point Vibrational Energy (zpe) 11101.5 cm-1
Scaled (by 0.9835) Zero Point Vibrational Energy (zpe) 10918.3 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/6-31G*
ABC
1.19694 0.17561 0.15542

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.023 -0.497 -0.132
O2 1.802 0.105 -0.099
O3 -0.947 -0.687 0.003
H4 2.130 -0.018 0.813
C5 -1.217 0.505 0.010
H6 -0.415 1.280 -0.007
H7 -2.276 0.862 0.033

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 H6 H7
H10.98511.98351.53222.45732.28863.5714
O20.98512.86260.97673.04682.51024.1494
O31.98352.86263.25131.22232.03772.0415
H41.53220.97673.25133.48132.97224.5603
C52.45733.04681.22233.48131.11521.1181
H62.28862.51022.03772.97221.11521.9078
H73.57144.14942.04154.56031.11811.9078

picture of water formaldehyde dimer state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.394      
2 O -0.789      
3 O -0.313      
4 H 0.374      
5 C 0.027      
6 H 0.165      
7 H 0.143      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.545 0.978 1.479 2.352
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 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


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