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

using model chemistry: CCSD/cc-pVTZ-PP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at CCSD/cc-pVTZ-PP
 hartrees
Energy at 0K-334.703744
Energy at 298.15K 
HF Energy-334.291102
Nuclear repulsion energy61.699980
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 CCSD/cc-pVTZ-PP
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 3110 2967 12.47      
2 A1 1308 1248 30.87      
3 A1 565 539 1.87      
4 E 3221 3073 0.88      
4 E 3221 3073 0.88      
5 E 1490 1421 4.55      
5 E 1490 1421 4.55      
6 E 909 868 5.34      
6 E 909 868 5.34      

Unscaled Zero Point Vibrational Energy (zpe) 8111.2 cm-1
Scaled (by 0.954) Zero Point Vibrational Energy (zpe) 7738.1 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 CCSD/cc-pVTZ-PP
ABC
5.24820 0.25155 0.25155

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/cc-pVTZ-PP

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.809
I2 0.000 0.000 0.326
H3 0.000 1.031 -2.142
H4 0.893 -0.515 -2.142
H5 -0.893 -0.515 -2.142

Atom - Atom Distances (Å)
  C1 I2 H3 H4 H5
C12.13521.08311.08311.0831
I22.13522.67442.67442.6744
H31.08312.67441.78531.7853
H41.08312.67441.78531.7853
H51.08312.67441.78531.7853

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 107.887 I2 C1 H4 107.887
I2 C1 H5 107.887 H3 C1 H4 111.008
H3 C1 H5 111.008 H4 C1 H5 111.008
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability