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: MP2=FULL/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at MP2=FULL/6-31G*
 hartrees
Energy at 0K-673.677316
Energy at 298.15K-673.680094
HF Energy-672.379349
Nuclear repulsion energy462.150199
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=FULL/6-31G*
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 1505 1418 0.00      
2 A1g 815 768 0.00      
3 A1g 354 334 0.00      
4 A1u 68 64 0.00      
5 A2u 1153 1087 283.68      
6 A2u 707 666 39.05      
7 Eg 1293 1219 0.00      
7 Eg 1293 1219 0.00      
8 Eg 622 586 0.00      
8 Eg 622 586 0.00      
9 Eg 380 358 0.00      
9 Eg 380 358 0.00      
10 Eu 1308 1233 521.66      
10 Eu 1308 1233 521.66      
11 Eu 517 487 5.44      
11 Eu 517 487 5.44      
12 Eu 214 201 2.89      
12 Eu 214 201 2.89      

Unscaled Zero Point Vibrational Energy (zpe) 6635.5 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 6251.9 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 MP2=FULL/6-31G*
ABC
0.09311 0.06180 0.06180

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G*

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.764
C2 0.000 0.000 -0.764
F3 0.000 1.260 1.215
F4 -1.091 -0.630 1.215
F5 1.091 -0.630 1.215
F6 0.000 -1.260 -1.215
F7 -1.091 0.630 -1.215
F8 1.091 0.630 -1.215

Atom - Atom Distances (Å)
  C1 C2 F3 F4 F5 F6 F7 F8
C11.52791.33851.33851.33852.34602.34602.3460
C21.52792.34602.34602.34601.33851.33851.3385
F31.33852.34602.18292.18293.50102.73712.7371
F41.33852.34602.18292.18292.73712.73713.5010
F51.33852.34602.18292.18292.73713.50102.7371
F62.34601.33853.50102.73712.73712.18292.1829
F72.34601.33852.73712.73713.50102.18292.1829
F82.34601.33852.73713.50102.73712.18292.1829

picture of hexafluoroethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 F6 109.686 C1 C2 F7 109.686
C1 C2 F8 109.686 C2 C1 F3 109.686
C2 C1 F4 109.686 C2 C1 F5 109.686
F3 C1 F4 109.255 F3 C1 F5 109.255
F4 C1 F5 109.255 F6 C2 F7 109.255
F6 C2 F8 109.255 F7 C2 F8 109.255
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at MP2=FULL/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.810      
2 C 0.810      
3 F -0.270      
4 F -0.270      
5 F -0.270      
6 F -0.270      
7 F -0.270      
8 F -0.270      


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 -41.071 0.000 0.000
y 0.000 -41.071 0.000
z 0.000 0.000 -40.992
Traceless
 xyz
x -0.039 0.000 0.000
y 0.000 -0.039 0.000
z 0.000 0.000 0.079
Polar
3z2-r20.158
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 3.562 0.000 0.000
y 0.000 3.562 0.000
z 0.000 0.000 3.364


<r2> (average value of r2) Å2
<r2> 198.104
(<r2>)1/2 14.075