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

using model chemistry: QCISD(T)=FULL/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 QCISD(T)=FULL/Def2TZVPP
 hartrees
Energy at 0K-337.081510
Energy at 298.15K 
HF Energy-336.289929
Nuclear repulsion energy61.899029
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 QCISD(T)=FULL/Def2TZVPP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3093 3093        
2 A1 1285 1285        
3 A1 554 554        
4 E 3205 3205        
4 E 3205 3205        
5 E 1479 1479        
5 E 1479 1479        
6 E 895 895        
6 E 895 895        

Unscaled Zero Point Vibrational Energy (zpe) 8045.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8045.3 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 QCISD(T)=FULL/Def2TZVPP
ABC
5.24521 0.25343 0.25343

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/Def2TZVPP

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.803
I2 0.000 0.000 0.325
H3 0.000 1.031 -2.131
H4 0.893 -0.516 -2.131
H5 -0.893 -0.516 -2.131

Atom - Atom Distances (Å)
  C1 I2 H3 H4 H5
C12.12771.08211.08211.0821
I22.12772.66372.66372.6637
H31.08212.66371.78581.7858
H41.08212.66371.78581.7858
H51.08212.66371.78581.7858

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 107.669 I2 C1 H4 107.669
I2 C1 H5 107.669 H3 C1 H4 111.212
H3 C1 H5 111.212 H4 C1 H5 111.212
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability