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: HSEh1PBE/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 HSEh1PBE/6-311G**
 hartrees
Energy at 0K-114.411659
Energy at 298.15K-114.413106
HF Energy-114.411659
Nuclear repulsion energy31.424331
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 HSEh1PBE/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 2895 2781 63.86 175.94 0.17 0.29
2 A1 1859 1785 114.11 5.22 0.57 0.73
3 A1 1541 1480 7.45 12.58 0.63 0.77
4 B1 1209 1161 2.75 1.35 0.75 0.86
5 B2 2950 2833 160.32 96.01 0.75 0.86
6 B2 1273 1223 14.38 4.64 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5862.9 cm-1
Scaled (by 0.9604) Zero Point Vibrational Energy (zpe) 5630.7 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 HSEh1PBE/6-311G**
ABC
9.47942 1.30965 1.15067

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-311G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.672
C2 0.000 0.000 -0.524
H3 0.000 0.939 -1.116
H4 0.000 -0.939 -1.116

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.19642.01972.0197
C21.19641.11001.1100
H32.01971.11001.8786
H42.01971.11001.8786

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 122.202 O1 C2 H4 122.202
H3 C2 H4 115.595
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.255      
2 C 0.087      
3 H 0.084      
4 H 0.084      


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 -11.497 0.000 0.000
y 0.000 -11.486 0.000
z 0.000 0.000 -11.986
Traceless
 xyz
x 0.239 0.000 0.000
y 0.000 0.256 0.000
z 0.000 0.000 -0.495
Polar
3z2-r2-0.990
x2-y2-0.011
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.170 0.000 0.000
y 0.000 2.118 0.000
z 0.000 0.000 2.824


<r2> (average value of r2) Å2
<r2> 16.799
(<r2>)1/2 4.099