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/6-311+G(3df,2pd)

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/6-311+G(3df,2pd)
 hartrees
Energy at 0K-114.413824
Energy at 298.15K-114.415269
HF Energy-114.413824
Nuclear repulsion energy31.478858
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/6-311+G(3df,2pd)
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 2903 2903 69.39      
2 A1 1857 1857 114.20      
3 A1 1530 1530 10.46      
4 B1 1205 1205 6.06      
5 B2 2963 2963 111.26      
6 B2 1266 1266 11.48      

Unscaled Zero Point Vibrational Energy (zpe) 5861.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5861.5 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/6-311+G(3df,2pd)
ABC
9.47528 1.31535 1.15501

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-311+G(3df,2pd)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.671
C2 0.000 0.000 -0.524
H3 0.000 0.939 -1.111
H4 0.000 -0.939 -1.111

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.19472.01402.0140
C21.19471.10771.1077
H32.01401.10771.8790
H42.01401.10771.8790

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 121.986 O1 C2 H4 121.986
H3 C2 H4 116.028
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-311+G(3df,2pd) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.510      
2 C 0.416      
3 H 0.047      
4 H 0.047      


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 -2.389 2.389
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.672 0.000 0.000
y 0.000 -11.573 0.000
z 0.000 0.000 -12.256
Traceless
 xyz
x 0.243 0.000 0.000
y 0.000 0.391 0.000
z 0.000 0.000 -0.634
Polar
3z2-r2-1.268
x2-y2-0.099
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.782 0.000 0.000
y 0.000 2.566 0.000
z 0.000 0.000 3.197


<r2> (average value of r2) Å2
<r2> 16.870
(<r2>)1/2 4.107