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Experimental data for C6F6 (hexafluorobenzene)

22 02 02 11 45
Other names
Benzene, hexafluoro-; perfluorobenzene;
INChI INChIKey SMILES IUPAC name
InChI=1S/C6F6/c7-1-2(8)4(10)6(12)5(11)3(1)9 ZQBFAOFFOQMSGJ-UHFFFAOYSA-N FC1=C(F)C(F)=C(F)C(F)=C1F perfluorobenzene
State Conformation
1A1G D6H
Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp)
Property Value Uncertainty units Reference Comment
Hfg(298.15K) enthalpy of formation -956.00 1.20 kJ mol-1 webbook -1015. (webbook)
Hfg(0K) enthalpy of formation   1.20 kJ mol-1 webbook -1015. (webbook)
Information can also be found for this species in the NIST Chemistry Webbook
Vibrational levels (cm-1) vibrations
Mode Number Symmetry Frequency Intensity Comment Description
Fundamental(cm-1) Harmonic(cm-1) Reference (km mol-1) unc. Reference
1 A1g 1493   2000Bra/Hud:982       1
2 A1g 556   2000Bra/Hud:982       2
3 A2g 788   2000Bra/Hud:982       3
4 A2u 210   2000Bra/Hud:982       11
5 B1u 1330   2000Bra/Hud:982       12
6 B1u 600   2000Bra/Hud:982       13
7 B2g 719   2000Bra/Hud:982       4
8 B2g 205   2000Bra/Hud:982       5
9 B2u 1252   2000Bra/Hud:982       14
10 B2u 278   2000Bra/Hud:982       15
11 E1g 365   2000Bra/Hud:982       10
12 E1u 1533   2000Bra/Hud:982       18
13 E1u 1019   2000Bra/Hud:982       19
14 E1u 313   2000Bra/Hud:982       20
15 E2g 1656   2000Bra/Hud:982       6
16 E2g 1162   2000Bra/Hud:982       7
17 E2g 440   2000Bra/Hud:982       8
18 E2g 267   2000Bra/Hud:982       9
19 E2u 645   2000Bra/Hud:982       16
20 E2u 137   2000Bra/Hud:982       17

vibrational zero-point energy: 11252.5 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for C6F6 (hexafluorobenzene).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment

Calculated rotational constants for C6F6 (hexafluorobenzene).
Product of moments of inertia moments of inertia
amu3Å6   0gm3 cm6
Geometric Data
picture of hexafluorobenzene

Point Group D6h


Internal coordinates
distances (r) in Å, angles (a) in degrees, dihedrals (d) in degrees
Description Value unc. Connectivity Reference Comment
Atom 1 Atom 2 Atom 3 Atom 4
rCC 1.401 0.014 1 2 1976Hellwege(II/7)
rCF 1.325 0.010 1 7 1976Hellwege(II/7)
aCCC 120 1 2 3 by symmetry
aCCF 120 1 2 8 by symmetry

Cartesians
Atom x (Å) y (Å) z (Å)

Atom - Atom Distances bond lengths
Distances in Å
 

Calculated geometries for C6F6 (hexafluorobenzene).

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
C:C 6
C-F 6

Connectivity
Atom 1 Atom 2
C1 C2
C1 C6
C1 F7
C2 C3
C2 F8
C3 C4
C3 F9
C4 C5
C4 F10
C5 C6
C5 F11
C6 F12
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1A1G

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference
9.800       webbook
Dipole, Quadrupole and Polarizability
Electric dipole moment dipole
State Config State description Conf description Exp. min. Dipole (Debye) Reference comment Point Group Components
x y z total dipole quadrupole
1 1 1A1G D6h True           D6h 0 1
Experimental dipole measurement abbreviations: MW microwave; DT Dielectric with Temperature variation; DR Indirect (usually an upper limit); MB Molecular beam
Calculated electric dipole moments for C6F6 (hexafluorobenzene).
Electric quadrupole moment quadrupole
State Config State description Conf description Exp. min. Quadrupole (D Å) Reference comment Point Group Components
xx yy zz dipole quadrupole
1 1 1A1G D6h True -4.750 -4.750 9.500 1981Bat/Buc:421 +-0.5 D6h 0 1

Calculated electric quadrupole moments for C6F6 (hexafluorobenzene).
Electric dipole polarizability (Å3) polarizability
alpha unc. Reference
9.580   HCP_Polar

Calculated electric dipole polarizability for C6F6 (hexafluorobenzene).

References
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squib reference DOI
1976Hellwege(II/7) Hellwege, KH and AM Hellwege (ed.). Landolt-Bornstein: Group II: Atomic and Molecular Physics Volume 7: Structure Data of Free Polyatomic Molecules. Springer-Verlag. Berlin. 1976.  
1981Bat/Buc:421 MR Battaglia, AD Buckingham, JH Williams "The electric quadrupole moments of benzene and hexafluorobenzene" Chem. Phys. Lett. 78, 421, 1981 10.1016/0009-2614(81)85228-1
2000Bra/Hud:982 DA Braden, BS Hudson "C6F6 and sym-C6F3H3: Ab Initio and DFT Studies of Structure, Vibrations, and Inelastic Neutron Scattering Spectra" J. Phys. Chem. A 2000, 104, 982-989 10.1021/jp992580w
HCP_Polar TM Miller, Handbook of Chemistry and Physics Online (http://hbcponline.com/faces/documents/10_04/10_04_0001.xhtml)  
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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