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

using model chemistry: mPW1PW91/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at mPW1PW91/6-311G**
 hartrees
Energy at 0K-6959.873094
Energy at 298.15K 
HF Energy-6959.873094
Nuclear repulsion energy119.234236
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 mPW1PW91/6-311G**
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 3110 2975 11.06      
2 A1 1295 1239 28.33      
3 A1 550 526 3.08      
4 E 3227 3087 0.58      
4 E 3227 3087 0.58      
5 E 1470 1406 8.44      
5 E 1470 1406 8.44      
6 E 907 868 8.52      
6 E 907 868 8.52      

Unscaled Zero Point Vibrational Energy (zpe) 8080.9 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 7731.0 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 mPW1PW91/6-311G**
ABC
5.21816 0.24831 0.24831

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-311G**

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 0.328
H3 0.000 1.034 -2.152
H4 0.895 -0.517 -2.152
H5 -0.895 -0.517 -2.152

Atom - Atom Distances (Å)
  C1 I2 H3 H4 H5
C12.15041.08501.08501.0850
I22.15042.68692.68692.6869
H31.08502.68691.79041.7904
H41.08502.68691.79041.7904
H51.08502.68691.79041.7904

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 107.690 I2 C1 H4 107.690
I2 C1 H5 107.690 H3 C1 H4 111.192
H3 C1 H5 111.192 H4 C1 H5 111.192
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.508      
2 I -0.031      
3 H 0.180      
4 H 0.180      
5 H 0.180      


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 -1.894 1.894
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -36.257 0.000 0.000
y 0.000 -36.257 0.000
z 0.000 0.000 -30.734
Traceless
 xyz
x -2.761 0.000 0.000
y 0.000 -2.761 0.000
z 0.000 0.000 5.523
Polar
3z2-r211.045
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 4.177 0.000 0.000
y 0.000 4.176 0.000
z 0.000 0.000 7.377


<r2> (average value of r2) Å2
<r2> 64.225
(<r2>)1/2 8.014