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: B1B95/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes TD 1A1
Energy calculated at B1B95/3-21G
 hartrees
Energy at 0K-27603.517255
Energy at 298.15K 
HF Energy-27603.517255
Nuclear repulsion energy2815.598752
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 B1B95/3-21G
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 191 183 0.00 17.77 0.00 0.00
2 E 81 77 0.00 2.77 0.75 0.86
2 E 81 77 0.00 2.77 0.75 0.86
3 T2 630 602 36.20 13.54 0.75 0.86
3 T2 630 602 36.20 13.54 0.75 0.86
3 T2 630 602 36.20 13.54 0.75 0.86
4 T2 120 115 0.04 3.71 0.75 0.86
4 T2 120 115 0.04 3.71 0.75 0.86
4 T2 120 115 0.04 3.71 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 1300.3 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 1244.0 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 B1B95/3-21G
ABC
0.01049 0.01049 0.01049

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G

Point Group is Td

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
I2 1.258 1.258 1.258
I3 -1.258 -1.258 1.258
I4 -1.258 1.258 -1.258
I5 1.258 -1.258 -1.258

Atom - Atom Distances (Å)
  C1 I2 I3 I4 I5
C12.17882.17882.17882.1788
I22.17883.55803.55803.5580
I32.17883.55803.55803.5580
I42.17883.55803.55803.5580
I52.17883.55803.55803.5580

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 B1B95/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.675      
2 I 0.169      
3 I 0.169      
4 I 0.169      
5 I 0.169      


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 -115.051 0.000 0.000
y 0.000 -115.051 0.000
z 0.000 0.000 -115.051
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 17.891 0.000 0.000
y 0.000 17.891 0.000
z 0.000 0.000 17.891


<r2> (average value of r2) Å2
<r2> 1078.287
(<r2>)1/2 32.837