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

using model chemistry: BLYP/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 BLYP/6-311G**
 hartrees
Energy at 0K-6959.425928
Energy at 298.15K 
HF Energy-6959.425928
Nuclear repulsion energy116.755143
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 BLYP/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 3016 3004 11.15      
2 A1 1244 1239 34.57      
3 A1 475 473 3.71      
4 E 3123 3110 1.92      
4 E 3123 3110 1.91      
5 E 1433 1427 6.81      
5 E 1433 1427 6.81      
6 E 869 865 7.85      
6 E 869 865 7.85      

Unscaled Zero Point Vibrational Energy (zpe) 7790.7 cm-1
Scaled (by 0.9961) Zero Point Vibrational Energy (zpe) 7760.3 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 BLYP/6-311G**
ABC
5.13028 0.23733 0.23733

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.868
I2 0.000 0.000 0.336
H3 0.000 1.042 -2.191
H4 0.903 -0.521 -2.191
H5 -0.903 -0.521 -2.191

Atom - Atom Distances (Å)
  C1 I2 H3 H4 H5
C12.20361.09141.09141.0914
I22.20362.73332.73332.7333
H31.09142.73331.80571.8057
H41.09142.73331.80571.8057
H51.09142.73331.80571.8057

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 107.219 I2 C1 H4 107.219
I2 C1 H5 107.219 H3 C1 H4 111.627
H3 C1 H5 111.627 H4 C1 H5 111.627
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.448      
2 I -0.033      
3 H 0.160      
4 H 0.160      
5 H 0.160      


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 -1.827 1.827
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -36.687 0.000 0.000
y 0.000 -36.687 0.000
z 0.000 0.000 -31.132
Traceless
 xyz
x -2.778 0.000 0.000
y 0.000 -2.778 0.000
z 0.000 0.000 5.556
Polar
3z2-r211.112
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 4.279 0.000 0.000
y 0.000 4.278 0.000
z 0.000 0.000 7.767


<r2> (average value of r2) Å2
<r2> 66.326
(<r2>)1/2 8.144