return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for H2CO (Formaldehyde)

using model chemistry: wB97X-D/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 wB97X-D/CEP-31G*
 hartrees
Energy at 0K-22.797914
Energy at 298.15K-22.799357
HF Energy-22.797914
Nuclear repulsion energy17.636305
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 wB97X-D/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 2968 2968 87.96 153.93 0.19 0.31
2 A1 1851 1851 124.28 8.89 0.17 0.29
3 A1 1543 1543 7.38 14.26 0.67 0.80
4 B1 1202 1202 7.64 0.22 0.75 0.86
5 B2 3035 3035 168.12 74.13 0.75 0.86
6 B2 1270 1270 12.17 4.99 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5934.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5934.2 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 wB97X-D/CEP-31G*
ABC
9.33771 1.27325 1.12047

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/CEP-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.682
C2 0.000 0.000 -0.535
H3 0.000 0.946 -1.123
H4 0.000 -0.946 -1.123

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.21632.03772.0377
C21.21631.11431.1143
H32.03771.11431.8928
H42.03771.11431.8928

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 121.865 O1 C2 H4 121.865
H3 C2 H4 116.269
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.095      
2 C -0.231      
3 H 0.163      
4 H 0.163      


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 -2.574 2.574
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.474 0.000 0.000
y 0.000 -11.144 0.000
z 0.000 0.000 -11.749
Traceless
 xyz
x -0.027 0.000 0.000
y 0.000 0.467 0.000
z 0.000 0.000 -0.440
Polar
3z2-r2-0.880
x2-y2-0.330
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.180 0.000 0.000
y 0.000 1.808 0.000
z 0.000 0.000 2.659


<r2> (average value of r2) Å2
<r2> 15.400
(<r2>)1/2 3.924