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 HCO (Formyl radical)

using model chemistry: HSEh1PBE/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at HSEh1PBE/3-21G*
 hartrees
Energy at 0K-113.092432
Energy at 298.15K 
HF Energy-113.092432
Nuclear repulsion energy26.063724
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/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 A' 2710 2601 75.64 127.64 0.33 0.50
2 A' 1860 1785 49.55 12.43 0.33 0.50
3 A' 1121 1076 31.77 17.17 0.68 0.81

Unscaled Zero Point Vibrational Energy (zpe) 2845.0 cm-1
Scaled (by 0.9599) Zero Point Vibrational Energy (zpe) 2730.9 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/3-21G*
ABC
25.58890 1.43301 1.35702

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.060 0.595 0.000
H2 -0.839 1.263 0.000
O3 0.060 -0.604 0.000

Atom - Atom Distances (Å)
  C1 H2 O3
C11.12031.1989
H21.12032.0724
O31.19892.0724

picture of Formyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 O3 126.623
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.147      
2 H 0.206      
3 O -0.352      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.039 1.370 0.000 1.720
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.172 -1.109 0.000
y -1.109 -11.561 0.000
z 0.000 0.000 -10.665
Traceless
 xyz
x -0.059 -1.109 0.000
y -1.109 -0.643 0.000
z 0.000 0.000 0.702
Polar
3z2-r21.404
x2-y20.389
xy-1.109
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.381 -0.340 0.000
y -0.340 2.337 0.000
z 0.000 0.000 0.912


<r2> (average value of r2) Å2
<r2> 14.345
(<r2>)1/2 3.787