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All results from a given calculation for H2CO (Formaldehyde)

using model chemistry: LSDA/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at LSDA/3-21G*
 hartrees
Energy at 0K-113.265205
Energy at 298.15K-113.266644
HF Energy-113.265205
Nuclear repulsion energy30.794510
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 LSDA/3-21G*
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 2791 2741 40.64      
2 A1 1751 1720 51.34      
3 A1 1535 1507 8.60      
4 B1 1184 1163 7.36      
5 B2 2826 2775 192.99      
6 B2 1246 1223 5.79      

Unscaled Zero Point Vibrational Energy (zpe) 5666.2 cm-1
Scaled (by 0.982) Zero Point Vibrational Energy (zpe) 5564.2 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 LSDA/3-21G*
ABC
9.55702 1.24528 1.10173

See section I.F.4 to change rotational constant units
Geometric Data calculated at LSDA/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.689
C2 0.000 0.000 -0.535
H3 0.000 0.935 -1.152
H4 0.000 -0.935 -1.152

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.22452.06522.0652
C21.22451.12041.1204
H32.06521.12041.8709
H42.06521.12041.8709

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 123.394 O1 C2 H4 123.394
H3 C2 H4 113.213
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.331      
2 C -0.012      
3 H 0.172      
4 H 0.172      


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 -1.967 1.967
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.561 0.000 0.000
y 0.000 -11.597 0.000
z 0.000 0.000 -12.117
Traceless
 xyz
x 0.296 0.000 0.000
y 0.000 0.243 0.000
z 0.000 0.000 -0.538
Polar
3z2-r2-1.077
x2-y20.035
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.792 0.000 0.000
y 0.000 1.970 0.000
z 0.000 0.000 2.549


<r2> (average value of r2) Å2
<r2> 17.267
(<r2>)1/2 4.155