return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for H2CO (Formaldehyde)

using model chemistry: PBE1PBE/6-31G

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/6-31G
 hartrees
Energy at 0K-114.326906
Energy at 298.15K-114.328352
HF Energy-114.326906
Nuclear repulsion energy30.889609
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/6-31G
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 2994 2862 36.65 158.94 0.16 0.28
2 A1 1774 1696 65.22 1.48 0.26 0.41
3 A1 1570 1500 14.84 17.08 0.61 0.75
4 B1 1212 1159 8.35 1.45 0.75 0.86
5 B2 3071 2936 136.58 74.29 0.75 0.86
6 B2 1280 1224 8.82 7.72 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5950.7 cm-1
Scaled (by 0.9559) Zero Point Vibrational Energy (zpe) 5688.3 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 PBE1PBE/6-31G
ABC
9.60612 1.25351 1.10882

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.687
C2 0.000 0.000 -0.541
H3 0.000 0.933 -1.126
H4 0.000 -0.933 -1.126

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.22782.03892.0389
C21.22781.10131.1013
H32.03891.10131.8662
H42.03891.10131.8662

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 122.087 O1 C2 H4 122.087
H3 C2 H4 115.825
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.354      
2 C 0.060      
3 H 0.147      
4 H 0.147      


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 -2.531 2.531
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.548 0.000 0.000
y 0.000 -11.504 0.000
z 0.000 0.000 -12.290
Traceless
 xyz
x 0.348 0.000 0.000
y 0.000 0.416 0.000
z 0.000 0.000 -0.764
Polar
3z2-r2-1.528
x2-y2-0.045
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.872 0.000 0.000
y 0.000 1.881 0.000
z 0.000 0.000 2.795


<r2> (average value of r2) Å2
<r2> 17.165
(<r2>)1/2 4.143