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

using model chemistry: QCISD/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 QCISD/cc-pVTZ-PP
 hartrees
Energy at 0K-334.704379
Energy at 298.15K 
HF Energy-334.291100
Nuclear repulsion energy61.673647
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/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 4309 4309 7.03      
2 A1 1996 1996 95.72      
3 A1 367 367 1.15      
4 E 2492 2492 29.44      
4 E 2492 2492 29.44      
5 E 1985 1985 42.69      
5 E 1985 1985 42.69      
6 E 1167 1167 5.23      
6 E 1167 1167 5.23      

Unscaled Zero Point Vibrational Energy (zpe) 8978.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8978.6 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/cc-pVTZ-PP
ABC
5.24457 0.25132 0.25132

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.810
I2 0.000 0.000 0.326
H3 0.000 1.031 -2.142
H4 0.893 -0.516 -2.142
H5 -0.893 -0.516 -2.142

Atom - Atom Distances (Å)
  C1 I2 H3 H4 H5
C12.13631.08331.08331.0833
I22.13632.67522.67522.6752
H31.08332.67521.78591.7859
H41.08332.67521.78591.7859
H51.08332.67521.78591.7859

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 107.861 I2 C1 H4 107.861
I2 C1 H5 107.861 H3 C1 H4 111.033
H3 C1 H5 111.033 H4 C1 H5 111.033
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability