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 C2F6 (hexafluoroethane)

using model chemistry: HF/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at HF/CEP-31G
 hartrees
Energy at 0K-153.934670
Energy at 298.15K-153.937474
Nuclear repulsion energy255.782632
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 HF/CEP-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1g 1493 1346 0.00      
2 A1g 806 726 0.00      
3 A1g 357 321 0.00      
4 A1u 67 60 0.00      
5 A2u 1141 1029 324.91      
6 A2u 697 628 72.32      
7 Eg 1317 1187 0.00      
7 Eg 1317 1187 0.00      
8 Eg 619 558 0.00      
8 Eg 619 558 0.00      
9 Eg 382 344 0.00      
9 Eg 382 344 0.00      
10 Eu 1318 1188 513.95      
10 Eu 1318 1188 513.95      
11 Eu 511 461 16.95      
11 Eu 511 461 16.95      
12 Eu 222 200 6.91      
12 Eu 222 200 6.91      

Unscaled Zero Point Vibrational Energy (zpe) 6649.4 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 5993.7 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 HF/CEP-31G
ABC
0.09083 0.05929 0.05929

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.779
C2 0.000 0.000 -0.779
F3 0.000 1.276 1.246
F4 -1.105 -0.638 1.246
F5 1.105 -0.638 1.246
F6 0.000 -1.276 -1.246
F7 -1.105 0.638 -1.246
F8 1.105 0.638 -1.246

Atom - Atom Distances (Å)
  C1 C2 F3 F4 F5 F6 F7 F8
C11.55851.35871.35871.35872.39372.39372.3937
C21.55852.39372.39372.39371.35871.35871.3587
F31.35872.39372.21012.21013.56682.79962.7996
F41.35872.39372.21012.21012.79962.79963.5668
F51.35872.39372.21012.21012.79963.56682.7996
F62.39371.35873.56682.79962.79962.21012.2101
F72.39371.35872.79962.79963.56682.21012.2101
F82.39371.35872.79963.56682.79962.21012.2101

picture of hexafluoroethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 F6 110.091 C1 C2 F7 110.091
C1 C2 F8 110.091 C2 C1 F3 110.091
C2 C1 F4 110.091 C2 C1 F5 110.091
F3 C1 F4 108.844 F3 C1 F5 108.844
F4 C1 F5 108.844 F6 C2 F7 108.844
F6 C2 F8 108.844 F7 C2 F8 108.844
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.522      
2 C 0.522      
3 F -0.174      
4 F -0.174      
5 F -0.174      
6 F -0.174      
7 F -0.174      
8 F -0.174      


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 -45.350 0.000 0.000
y 0.000 -45.350 0.000
z 0.000 0.000 -44.709
Traceless
 xyz
x -0.320 0.000 0.000
y 0.000 -0.320 0.000
z 0.000 0.000 0.641
Polar
3z2-r21.282
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 3.223 0.000 0.000
y 0.000 3.223 0.000
z 0.000 0.000 2.750


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000