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All results from a given calculation for H2CO (Formaldehyde)

using model chemistry: PBE1PBE/CEP-31G*

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-31G*
 hartrees
Energy at 0K-22.772784
Energy at 298.15K-22.774225
HF Energy-22.772784
Nuclear repulsion energy17.624855
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-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 A1 2959 2959 87.40      
2 A1 1855 1855 118.99      
3 A1 1535 1535 6.17      
4 B1 1193 1193 7.35      
5 B2 3031 3031 161.91      
6 B2 1259 1259 10.48      

Unscaled Zero Point Vibrational Energy (zpe) 5915.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5915.7 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-31G*
ABC
9.30904 1.27253 1.11950

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/CEP-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.682
C2 0.000 0.000 -0.534
H3 0.000 0.948 -1.125
H4 0.000 -0.948 -1.125

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.21602.04072.0407
C21.21601.11711.1171
H32.04071.11711.8957
H42.04071.11711.8957

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 121.953 O1 C2 H4 121.953
H3 C2 H4 116.094
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.088      
2 C -0.249      
3 H 0.168      
4 H 0.168      


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 -2.506 2.506
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.505 0.000 0.000
y 0.000 -11.211 0.000
z 0.000 0.000 -11.784
Traceless
 xyz
x -0.007 0.000 0.000
y 0.000 0.434 0.000
z 0.000 0.000 -0.426
Polar
3z2-r2-0.852
x2-y2-0.294
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.173 0.000 0.000
y 0.000 1.817 0.000
z 0.000 0.000 2.637


<r2> (average value of r2) Å2
<r2> 15.443
(<r2>)1/2 3.930