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

using model chemistry: B3LYP/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 B3LYP/6-311G*
 hartrees
Energy at 0K-6959.451528
Energy at 298.15K 
HF Energy-6959.451528
Nuclear repulsion energy118.096000
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 B3LYP/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 3090 2986 15.04      
2 A1 1305 1261 34.44      
3 A1 519 502 3.97      
4 E 3199 3091 2.18      
4 E 3199 3091 2.18      
5 E 1487 1437 7.94      
5 E 1487 1437 7.94      
6 E 908 877 9.23      
6 E 908 877 9.23      

Unscaled Zero Point Vibrational Energy (zpe) 8050.9 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 7779.5 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 B3LYP/6-311G*
ABC
5.21677 0.24310 0.24310

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-311G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.843
I2 0.000 0.000 0.332
H3 0.000 1.034 -2.173
H4 0.895 -0.517 -2.173
H5 -0.895 -0.517 -2.173

Atom - Atom Distances (Å)
  C1 I2 H3 H4 H5
C12.17461.08531.08531.0853
I22.17462.70992.70992.7099
H31.08532.70991.79061.7906
H41.08532.70991.79061.7906
H51.08532.70991.79061.7906

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 107.725 I2 C1 H4 107.725
I2 C1 H5 107.725 H3 C1 H4 111.160
H3 C1 H5 111.160 H4 C1 H5 111.160
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.783      
2 I 0.000      
3 H 0.261      
4 H 0.261      
5 H 0.261      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -1.877 1.877
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -36.575 0.000 0.000
y 0.000 -36.575 0.000
z 0.000 0.000 -31.018
Traceless
 xyz
x -2.778 0.000 0.000
y 0.000 -2.778 0.000
z 0.000 0.000 5.557
Polar
3z2-r211.114
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.162 0.000 0.000
y 0.000 4.161 0.000
z 0.000 0.000 7.505


<r2> (average value of r2) Å2
<r2> 65.271
(<r2>)1/2 8.079