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All results from a given calculation for H2CO (Formaldehyde)

using model chemistry: BLYP/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 BLYP/CEP-121G
 hartrees
Energy at 0K-22.716560
Energy at 298.15K-22.717993
HF Energy-22.716560
Nuclear repulsion energy17.227399
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 BLYP/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 2809 2794 66.21      
2 A1 1630 1621 50.91      
3 A1 1477 1469 26.85      
4 B1 1154 1148 10.96      
5 B2 2890 2875 186.02      
6 B2 1216 1209 5.96      

Unscaled Zero Point Vibrational Energy (zpe) 5588.0 cm-1
Scaled (by 0.9945) Zero Point Vibrational Energy (zpe) 5557.3 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 BLYP/CEP-121G
ABC
9.29705 1.19882 1.06189

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.703
C2 0.000 0.000 -0.555
H3 0.000 0.948 -1.144
H4 0.000 -0.948 -1.144

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.25802.07562.0756
C21.25801.11601.1160
H32.07561.11601.8969
H42.07561.11601.8969

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 121.806 O1 C2 H4 121.806
H3 C2 H4 116.389
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.120      
2 C -0.091      
3 H 0.106      
4 H 0.106      


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 -2.482 2.482
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.792 0.000 0.000
y 0.000 -11.718 0.000
z 0.000 0.000 -12.552
Traceless
 xyz
x 0.343 0.000 0.000
y 0.000 0.454 0.000
z 0.000 0.000 -0.797
Polar
3z2-r2-1.595
x2-y2-0.074
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.144 0.000 0.000
y 0.000 2.166 0.000
z 0.000 0.000 3.209


<r2> (average value of r2) Å2
<r2> 16.118
(<r2>)1/2 4.015