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All results from a given calculation for H2CO (Formaldehyde)

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/CEP-31G
 hartrees
Energy at 0K-22.747849
Energy at 298.15K-22.749277
HF Energy-22.747849
Nuclear repulsion energy17.196685
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 PBEPBEultrafine/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 2866 2866 89.55      
2 A1 1642 1642 50.80      
3 A1 1481 1481 14.34      
4 B1 1143 1143 21.10      
5 B2 2946 2946 189.11      
6 B2 1211 1211 4.06      

Unscaled Zero Point Vibrational Energy (zpe) 5644.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5644.4 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 PBEPBEultrafine/CEP-31G
ABC
9.18314 1.19799 1.05974

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

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 0.954 -1.147
H4 0.000 -0.954 -1.147

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.25732.08182.0818
C21.25731.12351.1235
H32.08181.12351.9086
H42.08181.12351.9086

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 121.849 O1 C2 H4 121.849
H3 C2 H4 116.303
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.083      
2 C -0.265      
3 H 0.174      
4 H 0.174      


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 -2.749 2.749
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.679 0.000 0.000
y 0.000 -11.306 0.000
z 0.000 0.000 -12.287
Traceless
 xyz
x 0.118 0.000 0.000
y 0.000 0.677 0.000
z 0.000 0.000 -0.795
Polar
3z2-r2-1.589
x2-y2-0.373
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.072 0.000 0.000
y 0.000 1.716 0.000
z 0.000 0.000 2.753


<r2> (average value of r2) Å2
<r2> 15.991
(<r2>)1/2 3.999