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All results from a given calculation for H2CO (Formaldehyde)

using model chemistry: PBEPBE/CEP-121G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at PBEPBE/CEP-121G*
 hartrees
Energy at 0K-22.789013
Energy at 298.15K-22.790446
HF Energy-22.789013
Nuclear repulsion energy17.527986
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 PBEPBE/CEP-121G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 2796 2796 81.26      
2 A1 1749 1749 98.42      
3 A1 1493 1493 8.13      
4 B1 1150 1150 4.10      
5 B2 2849 2849 196.60      
6 B2 1226 1226 8.72      

Unscaled Zero Point Vibrational Energy (zpe) 5631.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5631.5 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 PBEPBE/CEP-121G*
ABC
9.24330 1.25778 1.10713

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/CEP-121G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.686
C2 0.000 0.000 -0.536
H3 0.000 0.951 -1.135
H4 0.000 -0.951 -1.135

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.22212.05432.0543
C21.22211.12401.1240
H32.05431.12401.9024
H42.05431.12401.9024

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 122.190 O1 C2 H4 122.190
H3 C2 H4 115.620
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.198      
2 C -0.051      
3 H 0.124      
4 H 0.124      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -2.171 2.171
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.650 0.000 0.000
y 0.000 -11.647 0.000
z 0.000 0.000 -12.086
Traceless
 xyz
x 0.216 0.000 0.000
y 0.000 0.221 0.000
z 0.000 0.000 -0.438
Polar
3z2-r2-0.875
x2-y2-0.003
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.237 0.000 0.000
y 0.000 2.369 0.000
z 0.000 0.000 3.105


<r2> (average value of r2) Å2
<r2> 15.725
(<r2>)1/2 3.965