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

using model chemistry: wB97X-D/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 wB97X-D/3-21G*
 hartrees
Energy at 0K-6930.446474
Energy at 298.15K-6930.447558
HF Energy-6930.446474
Nuclear repulsion energy118.293142
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 wB97X-D/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A 3239 3070 0.16      
2 A 3236 3067 0.13      
3 A 3128 2965 7.42      
4 A 1538 1458 11.85      
5 A 1536 1456 11.56      
6 A 1366 1294 11.94      
7 A 933 884 11.44      
8 A 930 882 11.32      
9 A 573 543 2.59      

Unscaled Zero Point Vibrational Energy (zpe) 8239.4 cm-1
Scaled (by 0.9478) Zero Point Vibrational Energy (zpe) 7809.3 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 wB97X-D/3-21G*
ABC
5.19829 0.24415 0.24415

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/3-21G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.841 0.000 -0.000
I2 0.332 -0.000 0.000
H3 -2.178 -0.097 1.031
H4 -2.178 0.941 -0.431
H5 -2.178 -0.844 -0.600

Atom - Atom Distances (Å)
  C1 I2 H3 H4 H5
C12.17251.08861.08871.0887
I22.17252.71462.71452.7146
H31.08862.71461.79301.7929
H41.08872.71451.79301.7932
H51.08872.71461.79291.7932

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 108.029 I2 C1 H4 108.024
I2 C1 H5 108.027 H3 C1 H4 110.872
H3 C1 H5 110.867 H4 C1 H5 110.891
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.786      
2 I 0.013      
3 H 0.258      
4 H 0.258      
5 H 0.258      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.689 0.000 0.000 1.689
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.468 0.000 -0.000
y 0.000 -36.129 0.000
z -0.000 0.000 -36.130
Traceless
 xyz
x 5.661 0.000 -0.000
y 0.000 -2.830 0.000
z -0.000 0.000 -2.831
Polar
3z2-r2-5.663
x2-y25.661
xy0.000
xz-0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.939 0.001 0.001
y 0.001 4.345 0.001
z 0.001 0.001 4.345


<r2> (average value of r2) Å2
<r2> 64.832
(<r2>)1/2 8.052