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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-22.825587
Energy at 298.15K-22.827027
HF Energy-22.825587
Nuclear repulsion energy17.596717
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 2938 2812 91.68      
2 A1 1835 1756 117.20      
3 A1 1531 1465 6.40      
4 B1 1186 1135 7.59      
5 B2 3006 2878 172.57      
6 B2 1255 1201 10.22      

Unscaled Zero Point Vibrational Energy (zpe) 5874.5 cm-1
Scaled (by 0.9573) Zero Point Vibrational Energy (zpe) 5623.7 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
9.30227 1.26761 1.11559

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 0.683
C2 0.000 0.000 -0.535
H3 0.000 0.948 -1.127
H4 0.000 -0.948 -1.127

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.21842.04372.0437
C21.21841.11781.1178
H32.04371.11781.8964
H42.04371.11781.8964

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 121.980 O1 C2 H4 121.980
H3 C2 H4 116.041
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 -0.090      
2 C -0.237      
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 -2.501 2.501
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.481 0.000 0.000
y 0.000 -11.190 0.000
z 0.000 0.000 -11.769
Traceless
 xyz
x -0.002 0.000 0.000
y 0.000 0.435 0.000
z 0.000 0.000 -0.434
Polar
3z2-r2-0.867
x2-y2-0.291
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.177 0.000 0.000
y 0.000 1.827 0.000
z 0.000 0.000 2.655


<r2> (average value of r2) Å2
<r2> 15.456
(<r2>)1/2 3.931