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All results from a given calculation for H2CO (Formaldehyde)

using model chemistry: B1B95/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 B1B95/CEP-31G
 hartrees
Energy at 0K-22.730111
Energy at 298.15K-22.731550
HF Energy-22.730111
Nuclear repulsion energy17.385366
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 B1B95/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 2982 2855 78.76      
2 A1 1711 1638 61.04      
3 A1 1526 1462 13.96      
4 B1 1185 1134 16.90      
5 B2 3072 2942 162.63      
6 B2 1250 1197 7.31      

Unscaled Zero Point Vibrational Energy (zpe) 5863.1 cm-1
Scaled (by 0.9575) Zero Point Vibrational Energy (zpe) 5613.9 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 B1B95/CEP-31G
ABC
9.35636 1.22513 1.08328

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/CEP-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.695
C2 0.000 0.000 -0.549
H3 0.000 0.945 -1.133
H4 0.000 -0.945 -1.133

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.24392.05792.0579
C21.24391.11121.1112
H32.05791.11121.8909
H42.05791.11121.8909

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 121.699 O1 C2 H4 121.699
H3 C2 H4 116.601
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.108      
2 C -0.223      
3 H 0.165      
4 H 0.165      


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 -2.867 2.867
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.551 0.000 0.000
y 0.000 -11.214 0.000
z 0.000 0.000 -12.301
Traceless
 xyz
x 0.207 0.000 0.000
y 0.000 0.712 0.000
z 0.000 0.000 -0.919
Polar
3z2-r2-1.838
x2-y2-0.337
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.033 0.000 0.000
y 0.000 1.606 0.000
z 0.000 0.000 2.654


<r2> (average value of r2) Å2
<r2> 15.758
(<r2>)1/2 3.970