return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CI4 (tetraiodomethane)

using model chemistry: BLYP/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes TD 1A1
Energy calculated at BLYP/Def2TZVPP
 hartrees
Energy at 0K-1228.687182
Energy at 298.15K 
HF Energy-1228.687182
Nuclear repulsion energy693.222407
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 BLYP/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 167 167 0.00 20.82 0.00 0.00
2 E 77 77 0.00 3.41 0.75 0.86
2 E 77 77 0.00 3.41 0.75 0.86
3 T2 492 492 74.89 11.52 0.75 0.86
3 T2 492 492 74.89 11.52 0.75 0.86
3 T2 492 492 74.89 11.52 0.75 0.86
4 T2 114 114 0.43 5.08 0.75 0.86
4 T2 114 114 0.43 5.08 0.75 0.86
4 T2 114 114 0.43 5.08 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 1070.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 1070.0 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 BLYP/Def2TZVPP
ABC
0.01019 0.01019 0.01019

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/Def2TZVPP

Point Group is Td

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
I2 1.277 1.277 1.277
I3 -1.277 -1.277 1.277
I4 -1.277 1.277 -1.277
I5 1.277 -1.277 -1.277

Atom - Atom Distances (Å)
  C1 I2 I3 I4 I5
C12.21102.21102.21102.2110
I22.21103.61053.61053.6105
I32.21103.61053.61053.6105
I42.21103.61053.61053.6105
I52.21103.61053.61053.6105

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
Charges from optimized geometry at BLYP/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.196      
2 I 0.049      
3 I 0.049      
4 I 0.049      
5 I 0.049      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -110.743 0.000 0.000
y 0.000 -110.743 0.000
z 0.000 0.000 -110.743
Traceless
 xyz
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000
Polar
3z2-r20.000
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 21.862 0.000 0.000
y 0.000 21.862 0.000
z 0.000 0.000 21.862


<r2> (average value of r2) Å2
<r2> 558.016
(<r2>)1/2 23.622