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

using model chemistry: HSEh1PBE/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at HSEh1PBE/Def2TZVPP
 hartrees
Energy at 0K-337.597149
Energy at 298.15K 
HF Energy-337.597149
Nuclear repulsion energy61.742860
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 HSEh1PBE/Def2TZVPP
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 3101 3101 8.97      
2 A1 1277 1277 23.03      
3 A1 554 554 2.15      
4 E 3218 3218 0.26      
4 E 3218 3218 0.26      
5 E 1463 1463 5.83      
5 E 1463 1463 5.83      
6 E 896 896 6.86      
6 E 896 896 6.86      

Unscaled Zero Point Vibrational Energy (zpe) 8042.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8042.4 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 HSEh1PBE/Def2TZVPP
ABC
5.22077 0.25213 0.25213

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/Def2TZVPP

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.808
I2 0.000 0.000 0.326
H3 0.000 1.033 -2.136
H4 0.895 -0.517 -2.136
H5 -0.895 -0.517 -2.136

Atom - Atom Distances (Å)
  C1 I2 H3 H4 H5
C12.13341.08431.08431.0843
I22.13342.66992.66992.6699
H31.08432.66991.78991.7899
H41.08432.66991.78991.7899
H51.08432.66991.78991.7899

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 107.626 I2 C1 H4 107.626
I2 C1 H5 107.626 H3 C1 H4 111.252
H3 C1 H5 111.252 H4 C1 H5 111.252
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.391      
2 I -0.074      
3 H 0.155      
4 H 0.155      
5 H 0.155      


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 -1.720 1.720
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.760 0.000 0.000
y 0.000 -34.760 0.000
z 0.000 0.000 -29.528
Traceless
 xyz
x -2.616 0.000 0.000
y 0.000 -2.616 0.000
z 0.000 0.000 5.232
Polar
3z2-r210.465
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 5.280 0.000 0.000
y 0.000 5.280 0.000
z 0.000 0.000 8.294


<r2> (average value of r2) Å2
<r2> 59.775
(<r2>)1/2 7.731