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 CH3I (methyl iodide)

using model chemistry: CCD/6-311G*

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/6-311G*
 hartrees
Energy at 0K-6956.797432
Energy at 298.15K 
HF Energy-6956.433409
Nuclear repulsion energy118.816049
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/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 3102 2962 13.66      
2 A1 1350 1289 27.46      
3 A1 548 523 1.97      
4 E 3213 3069 1.71      
4 E 3213 3069 1.71      
5 E 1502 1435 7.72      
5 E 1502 1435 7.72      
6 E 932 890 8.87      
6 E 932 890 8.87      

Unscaled Zero Point Vibrational Energy (zpe) 8147.1 cm-1
Scaled (by 0.9551) Zero Point Vibrational Energy (zpe) 7781.3 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/6-311G*
ABC
5.21414 0.24651 0.24651

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.827
I2 0.000 0.000 0.329
H3 0.000 1.034 -2.166
H4 0.896 -0.517 -2.166
H5 -0.896 -0.517 -2.166

Atom - Atom Distances (Å)
  C1 I2 H3 H4 H5
C12.15651.08831.08831.0883
I22.15652.70152.70162.7016
H31.08832.70151.79111.7911
H41.08832.70161.79111.7911
H51.08832.70161.79111.7911

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 108.165 I2 C1 H4 108.165
I2 C1 H5 108.165 H3 C1 H4 110.745
H3 C1 H5 110.745 H4 C1 H5 110.745
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability