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 CH3 (Methyl radical)

using model chemistry: TPSSh/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 2A1
Energy calculated at TPSSh/6-311G**
 hartrees
Energy at 0K-39.855854
Energy at 298.15K-39.857014
HF Energy-39.855854
Nuclear repulsion energy9.649759
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 TPSSh/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' 3100 3100 0.00 131.93 0.13 0.22
2 A2" 478 478 83.24 0.00 0.75 0.86
3 E' 3279 3279 9.79 35.93 0.75 0.86
3 E' 3279 3279 9.78 35.94 0.75 0.86
4 E' 1420 1420 3.07 1.88 0.75 0.86
4 E' 1420 1420 3.07 1.88 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6487.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6487.2 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 TPSSh/6-311G**
ABC
9.52371 9.52371 4.76186

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

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
H2 0.000 1.082 0.000
H3 0.937 -0.541 0.000
H4 -0.937 -0.541 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4
C11.08211.08211.0821
H21.08211.87421.8742
H31.08211.87421.8742
H41.08211.87421.8742

picture of Methyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 120.000 H2 C1 H4 120.000
H3 C1 H4 120.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.387      
2 H 0.129      
3 H 0.129      
4 H 0.129      


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 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.904 0.000 0.000
y 0.000 1.904 0.000
z 0.000 0.000 1.201


<r2> (average value of r2) Å2
<r2> 8.309
(<r2>)1/2 2.883