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/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-190.733869
Energy at 298.15K-190.726718
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/6-31+G**
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 3806 3763 86.75      
2 A 3567 3526 279.71      
3 A 2941 2907 72.91      
4 A 2862 2829 67.26      
5 A 1746 1726 90.29      
6 A 1588 1570 100.29      
7 A 1483 1466 16.61      
8 A 1228 1214 5.00      
9 A 1155 1142 7.65      
10 A 530 524 115.40      
11 A 377 372 144.28      
12 A 193 191 30.45      
13 A 181 179 0.07      
14 A 80 79 48.03      
15 A 50 49 173.63      

Unscaled Zero Point Vibrational Energy (zpe) 10892.5 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 10768.4 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/6-31+G**
ABC
1.30411 0.16597 0.14723

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -1.045 -0.415 -0.000
O2 -1.821 0.187 -0.000
O3 0.893 -0.682 -0.000
H4 -2.602 -0.391 0.001
C5 1.332 0.460 0.000
H6 0.654 1.345 0.000
H7 2.431 0.655 -0.000

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 H6 H7
H10.98241.95611.55742.53282.44603.6367
O20.98242.85000.97143.16512.73264.2778
O31.95612.85003.50711.22372.04132.0381
H41.55740.97143.50714.02503.68975.1405
C52.53283.16511.22374.02501.11501.1160
H62.44602.73262.04133.68971.11501.9062
H73.63674.27782.03815.14051.11601.9062

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/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.374      
2 O -0.756      
3 O -0.302      
4 H 0.356      
5 C 0.022      
6 H 0.165      
7 H 0.139      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.346 0.266 0.003 1.372
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