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All results from a given calculation for CH3I (methyl iodide)

using model chemistry: CCD/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at CCD/3-21G
 hartrees
Energy at 0K-6927.382124
Energy at 298.15K 
HF Energy-6927.236250
Nuclear repulsion energy116.279813
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 CCD/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 3098 3012 13.53      
2 A1 1374 1336 28.15      
3 A1 526 512 2.75      
4 E 3198 3109 3.87      
4 E 3198 3109 3.87      
5 E 1550 1507 9.11      
5 E 1550 1507 9.11      
6 E 932 906 8.44      
6 E 932 906 8.44      

Unscaled Zero Point Vibrational Energy (zpe) 8178.5 cm-1
Scaled (by 0.9723) Zero Point Vibrational Energy (zpe) 7952.0 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 CCD/3-21G
ABC
5.17190 0.23514 0.23514

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.874
I2 0.000 0.000 0.337
H3 0.000 1.038 -2.210
H4 0.899 -0.519 -2.210
H5 -0.899 -0.519 -2.210

Atom - Atom Distances (Å)
  C1 I2 H3 H4 H5
C12.21171.09131.09131.0913
I22.21172.75112.75112.7511
H31.09132.75111.79841.7984
H41.09132.75111.79841.7984
H51.09132.75111.79841.7984

picture of methyl iodide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 H3 107.928 I2 C1 H4 107.928
I2 C1 H5 107.928 H3 C1 H4 110.970
H3 C1 H5 110.970 H4 C1 H5 110.970
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability