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All results from a given calculation for H2CO (Formaldehyde)

using model chemistry: B3PW91/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 B3PW91/CEP-121G
 hartrees
Energy at 0K-22.791116
Energy at 298.15K-22.792560
HF Energy-22.791116
Nuclear repulsion energy17.419312
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 B3PW91/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 2926 2801 57.92      
2 A1 1712 1639 68.88      
3 A1 1532 1466 20.99      
4 B1 1197 1146 10.46      
5 B2 3020 2891 146.27      
6 B2 1256 1203 8.07      

Unscaled Zero Point Vibrational Energy (zpe) 5821.3 cm-1
Scaled (by 0.9573) Zero Point Vibrational Energy (zpe) 5572.8 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 B3PW91/CEP-121G
ABC
9.42842 1.22864 1.08699

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/CEP-121G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.694
C2 0.000 0.000 -0.548
H3 0.000 0.942 -1.131
H4 0.000 -0.942 -1.131

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.24222.05372.0537
C21.24221.10761.1076
H32.05371.10761.8837
H42.05371.10761.8837

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 121.752 O1 C2 H4 121.752
H3 C2 H4 116.496
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.166      
2 C -0.085      
3 H 0.125      
4 H 0.125      


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 -2.655 2.655
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.639 0.000 0.000
y 0.000 -11.472 0.000
z 0.000 0.000 -12.398
Traceless
 xyz
x 0.297 0.000 0.000
y 0.000 0.546 0.000
z 0.000 0.000 -0.843
Polar
3z2-r2-1.685
x2-y2-0.166
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.096 0.000 0.000
y 0.000 1.987 0.000
z 0.000 0.000 3.049


<r2> (average value of r2) Å2
<r2> 15.817
(<r2>)1/2 3.977