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All results from a given calculation for H2CO (Formaldehyde)

using model chemistry: B3PW91/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 B3PW91/CEP-31G
 hartrees
Energy at 0K-22.786208
Energy at 298.15K-22.787646
HF Energy-22.786208
Nuclear repulsion energy17.358604
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-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 2976 2849 82.04      
2 A1 1704 1631 59.59      
3 A1 1527 1462 16.44      
4 B1 1184 1134 18.22      
5 B2 3066 2935 172.35      
6 B2 1249 1196 7.11      

Unscaled Zero Point Vibrational Energy (zpe) 5853.2 cm-1
Scaled (by 0.9573) Zero Point Vibrational Energy (zpe) 5603.3 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 B3PW91/CEP-31G
ABC
9.34804 1.22052 1.07957

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/CEP-31G

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 0.946 -1.134
H4 0.000 -0.946 -1.134

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.24642.06062.0606
C21.24641.11171.1117
H32.06061.11171.8917
H42.06061.11171.8917

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 121.700 O1 C2 H4 121.700
H3 C2 H4 116.600
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.119      
2 C -0.210      
3 H 0.164      
4 H 0.164      


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 -2.898 2.898
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.604 0.000 0.000
y 0.000 -11.220 0.000
z 0.000 0.000 -12.292
Traceless
 xyz
x 0.152 0.000 0.000
y 0.000 0.729 0.000
z 0.000 0.000 -0.880
Polar
3z2-r2-1.761
x2-y2-0.385
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.049 0.000 0.000
y 0.000 1.629 0.000
z 0.000 0.000 2.702


<r2> (average value of r2) Å2
<r2> 15.794
(<r2>)1/2 3.974