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/SDD

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/SDD
 hartrees
Energy at 0K-673.163313
Energy at 298.15K-673.165515
HF Energy-672.289687
Nuclear repulsion energy442.407888
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/SDD
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 1309 1264 0.00      
2 A1g 701 676 0.00      
3 A1g 322 311 0.00      
4 A1u 60 58 0.00      
5 A2u 1001 966 267.84      
6 A2u 612 591 46.86      
7 Eg 1085 1048 0.00      
7 Eg 1085 1048 0.00      
8 Eg 549 530 0.00      
8 Eg 549 530 0.00      
9 Eg 334 322 0.00      
9 Eg 334 322 0.00      
10 Eu 1106 1067 467.05      
10 Eu 1106 1067 467.05      
11 Eu 450 434 10.44      
11 Eu 450 434 10.44      
12 Eu 201 194 5.78      
12 Eu 201 194 5.78      

Unscaled Zero Point Vibrational Energy (zpe) 5726.9 cm-1
Scaled (by 0.9653) Zero Point Vibrational Energy (zpe) 5528.2 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/SDD
ABC
0.08531 0.05668 0.05668

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/SDD

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.785
C2 0.000 0.000 -0.785
F3 0.000 1.317 1.270
F4 -1.140 -0.658 1.270
F5 1.140 -0.658 1.270
F6 0.000 -1.317 -1.270
F7 -1.140 0.658 -1.270
F8 1.140 0.658 -1.270

Atom - Atom Distances (Å)
  C1 C2 F3 F4 F5 F6 F7 F8
C11.56961.40311.40311.40312.44042.44042.4404
C21.56962.44042.44042.44041.40311.40311.4031
F31.40312.44042.28042.28043.65852.86082.8608
F41.40312.44042.28042.28042.86082.86083.6585
F51.40312.44042.28042.28042.86083.65852.8608
F62.44041.40313.65852.86082.86082.28042.2804
F72.44041.40312.86082.86083.65852.28042.2804
F82.44041.40312.86083.65852.86082.28042.2804

picture of hexafluoroethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 F6 110.227 C1 C2 F7 110.227
C1 C2 F8 110.227 C2 C1 F3 110.227
C2 C1 F4 110.227 C2 C1 F5 110.227
F3 C1 F4 108.705 F3 C1 F5 108.705
F4 C1 F5 108.705 F6 C2 F7 108.705
F6 C2 F8 108.705 F7 C2 F8 108.705
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at MP2/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.629      
2 C 0.629      
3 F -0.210      
4 F -0.210      
5 F -0.210      
6 F -0.210      
7 F -0.210      
8 F -0.210      


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 -45.521 0.000 0.000
y 0.000 -45.521 0.000
z 0.000 0.000 -45.488
Traceless
 xyz
x -0.016 0.000 0.000
y 0.000 -0.016 0.000
z 0.000 0.000 0.032
Polar
3z2-r20.065
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 3.758 0.000 0.000
y 0.000 3.758 0.000
z 0.000 0.000 3.176


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