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All results from a given calculation for CI4 (tetraiodomethane)

using model chemistry: PM3

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
Energy calculated at PM3
 hartrees
Energy at 0K 
Energy at 298.15K0.163572
HF Energy0.163572
Nuclear repulsion energy120.586959
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 PM3
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 227 221 0.00 1.93 0.00 0.00
2 E 69i 67i 0.00 8.65 0.75 0.86
2 E 69i 67i 0.00 8.65 0.75 0.86
3 T2 1030 1003 359.53 0.01 0.75 0.86
3 T2 1030 1003 359.53 0.01 0.75 0.86
3 T2 1030 1003 359.53 0.01 0.75 0.86
4 T2 91i 89i 1.21 5.69 0.75 0.86
4 T2 91i 89i 1.21 5.69 0.75 0.86
4 T2 91i 89i 1.21 5.69 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 1453.4 cm-1
Scaled (by 0.974) Zero Point Vibrational Energy (zpe) 1415.6 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 PM3
ABC
0.01337 0.01337 0.01337

See section I.F.4 to change rotational constant units
Geometric Data calculated at PM3

Point Group is Td

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
I2 1.114 1.114 1.114
I3 -1.114 -1.114 1.114
I4 -1.114 1.114 -1.114
I5 1.114 -1.114 -1.114

Atom - Atom Distances (Å)
  C1 I2 I3 I4 I5
C11.93021.93021.93021.9302
I21.93023.15203.15203.1520
I31.93023.15203.15203.1520
I41.93023.15203.15203.1520
I51.93023.15203.15203.1520

picture of tetraiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 109.471 I2 C1 I4 109.471
I2 C1 I5 109.471 I3 C1 I4 109.471
I3 C1 I5 109.471 I4 C1 I5 109.471
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability