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

using model chemistry: MP2=FULL/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=FULL/6-311G*
 hartrees
Energy at 0K-6957.296512
Energy at 298.15K 
HF Energy-6956.433515
Nuclear repulsion energy119.135601
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=FULL/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 3130 2964 11.29      
2 A1 1351 1280 26.49      
3 A1 555 526 1.99      
4 E 3250 3078 0.65      
4 E 3250 3078 0.65      
5 E 1511 1431 8.38      
5 E 1511 1431 8.38      
6 E 937 887 9.77      
6 E 937 887 9.77      

Unscaled Zero Point Vibrational Energy (zpe) 8216.1 cm-1
Scaled (by 0.9471) Zero Point Vibrational Energy (zpe) 7781.5 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=FULL/6-311G*
ABC
5.23635 0.24786 0.24786

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.822
I2 0.000 0.000 0.329
H3 0.000 1.032 -2.160
H4 0.894 -0.516 -2.160
H5 -0.894 -0.516 -2.160

Atom - Atom Distances (Å)
  C1 I2 H3 H4 H5
C12.15071.08581.08581.0858
I22.15072.69402.69402.6940
H31.08582.69401.78731.7873
H41.08582.69401.78731.7873
H51.08582.69401.78731.7873

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 108.127 I2 C1 H4 108.127
I2 C1 H5 108.127 H3 C1 H4 110.781
H3 C1 H5 110.781 H4 C1 H5 110.781
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability