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All results from a given calculation for CI4 (tetraiodomethane)

using model chemistry: MP2/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes TD 1A1
Energy calculated at MP2/CEP-121G
 hartrees
Energy at 0K-50.442198
Energy at 298.15K 
HF Energy-50.238077
Nuclear repulsion energy68.967128
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 MP2/CEP-121G
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 173 169 0.00 14.59 0.00 0.00
2 E 86 84 0.00 5.91 0.75 0.86
2 E 86 84 0.00 5.91 0.75 0.86
3 T2 551 538 37.81 5.90 0.75 0.86
3 T2 551 538 37.81 5.90 0.75 0.86
3 T2 551 538 37.81 5.90 0.75 0.86
4 T2 128 125 0.22 7.94 0.75 0.86
4 T2 128 125 0.22 7.94 0.75 0.86
4 T2 128 125 0.22 7.94 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 1191.4 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 1162.8 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 MP2/CEP-121G
ABC
0.00992 0.00992 0.00992

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is Td

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
I2 1.294 1.294 1.294
I3 -1.294 -1.294 1.294
I4 -1.294 1.294 -1.294
I5 1.294 -1.294 -1.294

Atom - Atom Distances (Å)
  C1 I2 I3 I4 I5
C12.24082.24082.24082.2408
I22.24083.65923.65923.6592
I32.24083.65923.65923.6592
I42.24083.65923.65923.6592
I52.24083.65923.65923.6592

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