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: B3PW91/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3PW91/6-311G*
 hartrees
Energy at 0K-114.484960
Energy at 298.15K-114.486405
HF Energy-114.484960
Nuclear repulsion energy31.399664
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 B3PW91/6-311G*
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 2892 2784 70.64      
2 A1 1853 1784 115.58      
3 A1 1549 1491 7.52      
4 B1 1193 1149 2.47      
5 B2 2945 2835 176.58      
6 B2 1281 1233 14.39      

Unscaled Zero Point Vibrational Energy (zpe) 5856.1 cm-1
Scaled (by 0.9627) Zero Point Vibrational Energy (zpe) 5637.7 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 B3PW91/6-311G*
ABC
9.46022 1.30776 1.14893

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.673
C2 0.000 0.000 -0.525
H3 0.000 0.940 -1.116
H4 0.000 -0.940 -1.116

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.19762.02042.0204
C21.19761.11041.1104
H32.02041.11041.8805
H42.02041.11041.8805

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 122.137 O1 C2 H4 122.137
H3 C2 H4 115.726
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.258      
2 C -0.080      
3 H 0.169      
4 H 0.169      


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 -2.254 2.254
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.519 0.000 0.000
y 0.000 -11.458 0.000
z 0.000 0.000 -11.984
Traceless
 xyz
x 0.202 0.000 0.000
y 0.000 0.293 0.000
z 0.000 0.000 -0.495
Polar
3z2-r2-0.989
x2-y2-0.061
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.119 0.000 0.000
y 0.000 2.094 0.000
z 0.000 0.000 2.797


<r2> (average value of r2) Å2
<r2> 16.810
(<r2>)1/2 4.100