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: M06-2X/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 M06-2X/3-21G*
 hartrees
Energy at 0K-189.762500
Energy at 298.15K-189.766655
HF Energy-189.762500
Nuclear repulsion energy70.872615
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 M06-2X/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 3663 3470 26.37      
2 A 3473 3290 114.41      
3 A 3148 2982 15.65      
4 A 3023 2864 52.76      
5 A 1739 1648 27.52      
6 A 1718 1627 75.55      
7 A 1555 1473 25.71      
8 A 1294 1226 2.65      
9 A 1267 1200 9.36      
10 A 764 724 395.48      
11 A 454 430 38.33      
12 A 388 368 101.82      
13 A 326 309 130.64      
14 A 293 278 72.01      
15 A 267 253 11.69      

Unscaled Zero Point Vibrational Energy (zpe) 11686.4 cm-1
Scaled (by 0.9472) Zero Point Vibrational Energy (zpe) 11069.4 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 M06-2X/3-21G*
ABC
1.15705 0.20232 0.17507

See section I.F.4 to change rotational constant units
Geometric Data calculated at M06-2X/3-21G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.942 -0.589 -0.152
O2 1.667 0.094 -0.098
O3 -0.928 -0.691 0.008
H4 2.065 -0.001 0.804
C5 -1.097 0.532 0.008
H6 -0.235 1.202 -0.038
H7 -2.101 0.973 0.052

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 H6 H7
H10.99741.88031.58722.33252.14673.4262
O20.99742.71390.99022.80082.20283.8719
O31.88032.71393.17351.23472.01692.0360
H41.58720.99023.17353.30422.72964.3439
C52.33252.80081.23473.30421.09271.0970
H62.14672.20282.01692.72961.09271.8813
H73.42623.87192.03604.34391.09701.8813

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 105.989 H1 O3 C5 94.701
O2 H1 O3 139.102 O3 C5 H6 120.005
O3 C5 H7 121.548 H6 C5 H7 118.447
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at M06-2X/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.361      
2 O -0.702      
3 O -0.425      
4 H 0.332      
5 C 0.030      
6 H 0.219      
7 H 0.186      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.129 1.039 1.618 2.229
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.449 -4.158 3.706
y -4.158 -18.207 0.213
z 3.706 0.213 -16.955
Traceless
 xyz
x -0.868 -4.158 3.706
y -4.158 -0.505 0.213
z 3.706 0.213 1.373
Polar
3z2-r22.746
x2-y2-0.242
xy-4.158
xz3.706
yz0.213


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.952 -0.202 0.298
y -0.202 2.741 -0.028
z 0.298 -0.028 1.437


<r2> (average value of r2) Å2
<r2> 66.218
(<r2>)1/2 8.137