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

using model chemistry: HF/LANL2DZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at HF/LANL2DZ
 hartrees
Energy at 0K-50.753985
Energy at 298.15K 
HF Energy-50.753985
Nuclear repulsion energy24.053433
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 HF/LANL2DZ
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 3274 2946 46.24 183.25 0.00 0.00
2 A1 1454 1308 53.85 13.79 0.47 0.64
3 A1 529 476 14.10 73.58 0.35 0.51
4 E 3412 3070 10.27 80.80 0.75 0.86
4 E 3412 3070 10.27 80.80 0.75 0.86
5 E 1614 1453 7.11 18.43 0.75 0.86
5 E 1614 1453 7.11 18.43 0.75 0.86
6 E 1011 910 16.65 13.42 0.75 0.86
6 E 1011 910 16.65 13.42 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8665.4 cm-1
Scaled (by 0.8999) Zero Point Vibrational Energy (zpe) 7798.0 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 HF/LANL2DZ
ABC
5.29503 0.24237 0.24237

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/LANL2DZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.848
I2 0.000 0.000 0.332
H3 0.000 1.026 -2.170
H4 0.889 -0.513 -2.170
H5 -0.889 -0.513 -2.170

Atom - Atom Distances (Å)
  C1 I2 H3 H4 H5
C12.18041.07531.07531.0753
I22.18042.70422.70422.7042
H31.07532.70421.77731.7773
H41.07532.70421.77731.7773
H51.07532.70421.77731.7773

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 107.398 I2 C1 H4 107.398
I2 C1 H5 107.398 H3 C1 H4 111.462
H3 C1 H5 111.462 H4 C1 H5 111.462
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/LANL2DZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.798      
2 I 0.053      
3 H 0.248      
4 H 0.248      
5 H 0.248      


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 -2.117 2.117
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.422 0.000 0.000
y 0.000 -28.422 0.000
z 0.000 0.000 -23.020
Traceless
 xyz
x -2.701 0.000 0.000
y 0.000 -2.701 0.000
z 0.000 0.000 5.402
Polar
3z2-r210.805
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 1.778 0.000 0.000
y 0.000 1.778 0.000
z 0.000 0.000 7.578


<r2> (average value of r2) Å2
<r2> 55.182
(<r2>)1/2 7.428