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All results from a given calculation for H2CO (Formaldehyde)

using model chemistry: PBEPBE/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at PBEPBE/6-31G
 hartrees
Energy at 0K-114.331521
Energy at 298.15K-114.332956
HF Energy-114.331521
Nuclear repulsion energy30.558324
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 PBEPBE/6-31G
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 2865 2825 48.58 172.35 0.16 0.28
2 A1 1700 1677 56.70 0.46 0.18 0.31
3 A1 1518 1497 14.64 18.20 0.63 0.77
4 B1 1161 1145 7.50 2.31 0.75 0.86
5 B2 2924 2883 180.09 89.12 0.75 0.86
6 B2 1236 1219 6.31 10.04 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5702.1 cm-1
Scaled (by 0.9862) Zero Point Vibrational Energy (zpe) 5623.4 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 PBEPBE/6-31G
ABC
9.43832 1.22576 1.08487

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-31G

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 -0.546
H3 0.000 0.941 -1.142
H4 0.000 -0.941 -1.142

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.24052.06402.0640
C21.24051.11431.1143
H32.06401.11431.8827
H42.06401.11431.8827

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 122.354 O1 C2 H4 122.354
H3 C2 H4 115.291
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.315      
2 C 0.052      
3 H 0.131      
4 H 0.131      


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 -2.296 2.296
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.555 0.000 0.000
y 0.000 -11.625 0.000
z 0.000 0.000 -12.323
Traceless
 xyz
x 0.419 0.000 0.000
y 0.000 0.314 0.000
z 0.000 0.000 -0.733
Polar
3z2-r2-1.467
x2-y20.070
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.894 0.000 0.000
y 0.000 2.010 0.000
z 0.000 0.000 2.883


<r2> (average value of r2) Å2
<r2> 17.421
(<r2>)1/2 4.174