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

using model chemistry: MP2/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP2/6-311G*
 hartrees
Energy at 0K-6956.780660
Energy at 298.15K-6956.781734
HF Energy-6956.433497
Nuclear repulsion energy119.079898
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 MP2/6-311G*
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 3125 2970 11.53      
2 A1 1350 1283 27.35      
3 A1 553 525 2.24      
4 E 3246 3084 0.70      
4 E 3246 3084 0.70      
5 E 1511 1436 8.21      
5 E 1511 1436 8.21      
6 E 938 891 9.55      
6 E 938 891 9.55      

Unscaled Zero Point Vibrational Energy (zpe) 8208.3 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 7800.4 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 MP2/6-311G*
ABC
5.22643 0.24764 0.24764

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.823
I2 0.000 0.000 0.328
H3 0.000 1.034 -2.156
H4 0.895 -0.517 -2.156
H5 -0.895 -0.517 -2.156

Atom - Atom Distances (Å)
  C1 I2 H3 H4 H5
C12.15121.08611.08611.0861
I22.15122.69072.69072.6907
H31.08612.69071.79061.7906
H41.08612.69071.79061.7906
H51.08612.69071.79061.7906

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 107.852 I2 C1 H4 107.852
I2 C1 H5 107.852 H3 C1 H4 111.040
H3 C1 H5 111.040 H4 C1 H5 111.041
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability