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

using model chemistry: CCSD(T)/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 CCSD(T)/Def2TZVPP
 hartrees
Energy at 0K-336.975393
Energy at 298.15K 
HF Energy-336.289883
Nuclear repulsion energy61.732807
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(T)/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 3095 3095        
2 A1 1287 1287        
3 A1 552 552        
4 E 3207 3207        
4 E 3207 3207        
5 E 1478 1478        
5 E 1478 1478        
6 E 899 899        
6 E 898 898        

Unscaled Zero Point Vibrational Energy (zpe) 8050.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8050.5 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(T)/Def2TZVPP
ABC
5.22220 0.25200 0.25200

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/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 -2.137
H4 0.895 -0.517 -2.137
H5 -0.895 -0.517 -2.137

Atom - Atom Distances (Å)
  C1 I2 H3 H4 H5
C12.13401.08421.08421.0842
I22.13402.67042.67042.6704
H31.08422.67041.78971.7897
H41.08422.67041.78971.7897
H51.08422.67041.78971.7897

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 107.635 I2 C1 H4 107.635
I2 C1 H5 107.635 H3 C1 H4 111.244
H3 C1 H5 111.244 H4 C1 H5 111.244
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability