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

using model chemistry: CISD/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 CISD/cc-pVTZ-PP
 hartrees
Energy at 0K-334.662045
Energy at 298.15K 
HF Energy-334.291145
Nuclear repulsion energy61.950409
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 CISD/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 3168 3168 12.70      
2 A1 1341 1341 32.89      
3 A1 580 580 2.39      
4 E 3280 3280 0.69      
4 E 3280 3280 0.69      
5 E 1521 1521 4.91      
5 E 1521 1521 4.91      
6 E 932 932 5.55      
6 E 932 932 5.55      

Unscaled Zero Point Vibrational Energy (zpe) 8277.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8277.3 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 CISD/cc-pVTZ-PP
ABC
5.29686 0.25356 0.25356

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.802
I2 0.000 0.000 0.325
H3 0.000 1.026 -2.134
H4 0.889 -0.513 -2.134
H5 -0.889 -0.513 -2.134

Atom - Atom Distances (Å)
  C1 I2 H3 H4 H5
C12.12661.07831.07831.0783
I22.12662.66402.66402.6640
H31.07832.66401.77701.7770
H41.07832.66401.77701.7770
H51.07832.66401.77701.7770

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 107.927 I2 C1 H4 107.927
I2 C1 H5 107.927 H3 C1 H4 110.971
H3 C1 H5 110.971 H4 C1 H5 110.971
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability