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

using model chemistry: QCISD(T)=FULL/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(T)=FULL/cc-pVTZ-PP
 hartrees
Energy at 0K-334.762450
Energy at 298.15K 
HF Energy-334.291168
Nuclear repulsion energy61.685157
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/cc-pVTZ-PP
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 3111 3111        
2 A1 1296 1296        
3 A1 555 555        
4 E 3203 3203        
4 E 3203 3203        
5 E 1488 1488        
5 E 1488 1488        
6 E 899 899        
6 E 898 898        

Unscaled Zero Point Vibrational Energy (zpe) 8069.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8069.7 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/cc-pVTZ-PP
ABC
5.26091 0.25121 0.25121

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.811
I2 0.000 0.000 0.326
H3 0.000 1.029 -2.141
H4 0.892 -0.515 -2.141
H5 -0.892 -0.515 -2.141

Atom - Atom Distances (Å)
  C1 I2 H3 H4 H5
C12.13731.08111.08111.0811
I22.13732.67362.67362.6736
H31.08112.67361.78311.7831
H41.08112.67361.78311.7831
H51.08112.67361.78311.7831

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 107.777 I2 C1 H4 107.777
I2 C1 H5 107.777 H3 C1 H4 111.111
H3 C1 H5 111.111 H4 C1 H5 111.111
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability