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All results from a given calculation for H2CO (Formaldehyde)

using model chemistry: PBE1PBE/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 PBE1PBE/CEP-121G
 hartrees
Energy at 0K-22.736719
Energy at 298.15K-22.738164
HF Energy-22.736719
Nuclear repulsion energy17.448923
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/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 2948 2948 53.96      
2 A1 1729 1729 71.47      
3 A1 1539 1539 19.68      
4 B1 1205 1205 10.38      
5 B2 3044 3044 136.74      
6 B2 1263 1263 8.32      

Unscaled Zero Point Vibrational Energy (zpe) 5864.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5864.1 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/CEP-121G
ABC
9.43722 1.23365 1.09103

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/CEP-121G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.693
C2 0.000 0.000 -0.547
H3 0.000 0.941 -1.129
H4 0.000 -0.941 -1.129

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.23962.05032.0503
C21.23961.10671.1067
H32.05031.10671.8828
H42.05031.10671.8828

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 121.717 O1 C2 H4 121.717
H3 C2 H4 116.567
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.166      
2 C -0.091      
3 H 0.128      
4 H 0.128      


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 -2.670 2.670
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.667 0.000 0.000
y 0.000 -11.495 0.000
z 0.000 0.000 -12.425
Traceless
 xyz
x 0.293 0.000 0.000
y 0.000 0.552 0.000
z 0.000 0.000 -0.844
Polar
3z2-r2-1.688
x2-y2-0.173
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.090 0.000 0.000
y 0.000 1.975 0.000
z 0.000 0.000 3.028


<r2> (average value of r2) Å2
<r2> 15.805
(<r2>)1/2 3.976