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All results from a given calculation for CH3 (Methyl radical)

using model chemistry: QCISD/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 2A1
Energy calculated at QCISD/3-21G
 hartrees
Energy at 0K-39.435936
Energy at 298.15K-39.437076
HF Energy-39.342187
Nuclear repulsion energy9.616013
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 QCISD/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 A1' 3095 3000 0.00      
2 A2" 451 437 87.85      
3 E' 3268 3167 9.36      
3 E' 3268 3167 9.36      
4 E' 1475 1429 1.98      
4 E' 1475 1429 1.98      

Unscaled Zero Point Vibrational Energy (zpe) 6515.3 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 6314.6 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 QCISD/3-21G
ABC
9.45722 9.45722 4.72861

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

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
H2 0.000 1.086 0.000
H3 0.940 -0.543 0.000
H4 -0.940 -0.543 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4
C11.08591.08591.0859
H21.08591.88081.8808
H31.08591.88081.8808
H41.08591.88081.8808

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

Electronic state

Charges, Dipole, Quadrupole and Polarizability