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 CF2I2 (difluorodiiodomethane)

using model chemistry: PBEPBE/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at PBEPBE/3-21G
 hartrees
Energy at 0K-14016.145993
Energy at 298.15K 
HF Energy-14016.145993
Nuclear repulsion energy941.380591
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 PBEPBE/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 1039 1030 269.65 4.39 0.75 0.86
2 A1 541 536 12.64 2.14 0.05 0.09
3 A1 242 240 1.50 15.10 0.19 0.32
4 A1 104 103 0.01 8.49 0.51 0.68
5 A2 228 226 0.00 2.02 0.75 0.86
6 B1 649 643 439.27 5.26 0.75 0.86
7 B1 249 247 3.64 7.32 0.75 0.86
8 B2 1155 1145 134.38 0.36 0.75 0.86
9 B2 287 285 0.71 3.70 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 2247.4 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 2226.9 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 PBEPBE/3-21G
ABC
0.08561 0.01779 0.01608

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.908
F2 0.000 1.122 1.702
F3 0.000 -1.122 1.702
I4 1.883 0.000 -0.340
I5 -1.883 0.000 -0.340

Atom - Atom Distances (Å)
  C1 F2 F3 I4 I5
C11.37501.37502.25912.2591
F21.37502.24492.99622.9962
F31.37502.24492.99622.9962
I42.25912.99622.99623.7654
I52.25912.99622.99623.7654

picture of difluorodiiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 C1 F3 109.436 F2 C1 I4 108.616
F2 C1 I5 108.616 F3 C1 I4 108.616
F3 C1 I5 108.616 I4 C1 I5 112.899
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.044      
2 F -0.193      
3 F -0.193      
4 I 0.171      
5 I 0.171      


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 -0.305 0.305
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -69.047 0.000 0.000
y 0.000 -73.507 0.000
z 0.000 0.000 -71.611
Traceless
 xyz
x 3.512 0.000 0.000
y 0.000 -3.178 0.000
z 0.000 0.000 -0.334
Polar
3z2-r2-0.669
x2-y24.460
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 13.624 0.000 0.000
y 0.000 3.903 0.000
z 0.000 0.000 6.016


<r2> (average value of r2) Å2
<r2> 512.392
(<r2>)1/2 22.636