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: B3LYPultrafine/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 B3LYPultrafine/CEP-121G
 hartrees
Energy at 0K-22.766509
Energy at 298.15K-22.767952
HF Energy-22.766509
Nuclear repulsion energy17.386074
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 B3LYPultrafine/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 2913 2838 55.55      
2 A1 1693 1650 62.45      
3 A1 1524 1485 24.70      
4 B1 1195 1164 10.50      
5 B2 3005 2929 148.55      
6 B2 1252 1220 8.31      

Unscaled Zero Point Vibrational Energy (zpe) 5790.6 cm-1
Scaled (by 0.9745) Zero Point Vibrational Energy (zpe) 5643.0 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 B3LYPultrafine/CEP-121G
ABC
9.42857 1.22229 1.08202

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/CEP-121G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.696
C2 0.000 0.000 -0.550
H3 0.000 0.942 -1.132
H4 0.000 -0.942 -1.132

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.24612.05612.0561
C21.24611.10691.1069
H32.05611.10691.8836
H42.05611.10691.8836

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 121.697 O1 C2 H4 121.697
H3 C2 H4 116.606
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.153      
2 C -0.077      
3 H 0.115      
4 H 0.115      


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 -2.652 2.652
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.739 0.000 0.000
y 0.000 -11.583 0.000
z 0.000 0.000 -12.492
Traceless
 xyz
x 0.298 0.000 0.000
y 0.000 0.533 0.000
z 0.000 0.000 -0.831
Polar
3z2-r2-1.662
x2-y2-0.156
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.112 0.000 0.000
y 0.000 2.021 0.000
z 0.000 0.000 3.091


<r2> (average value of r2) Å2
<r2> 15.909
(<r2>)1/2 3.989