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Experimental data for C3F8 (perfluoropropane)

22 02 02 11 45
Other names
Octafluoropropane; Propane, octafluoro-; Freon 218; Genetron 218; perfluoropropane;
INChI INChIKey SMILES IUPAC name
InChI=1S/C3F8/c4-1(5,2(6,7)8)3(9,10)11 QYSGYZVSCZSLHT-UHFFFAOYSA-N FC(F)(F)C(F)(F)C(F)(F)F perfluoropropane
State Conformation
1A1 C2V
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 -1784.70 8.80 kJ mol-1 webbook
Hfg(0K) enthalpy of formation   8.80 kJ mol-1 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 A1 1370   1977Bur/Paw:525       renumbered
2 A1 1262   1977Bur/Paw:525       renumbered
3 A1 1155   1977Bur/Paw:525       renumbered
4 A1 781   1977Bur/Paw:525       renumbered
5 A1 665   1977Bur/Paw:525       renumbered
6 A1 547   1977Bur/Paw:525       renumbered
7 A1 383   1977Bur/Paw:525       renumbered
8 A1 318   1977Bur/Paw:525       renumbered
9 A1 151   1977Bur/Paw:525       renumbered
11 A2 537   1977Bur/Paw:525       renumbered
12 A2 347   1977Bur/Paw:525       renumbered
13 A2 276   1977Bur/Paw:525       renumbered
15 B1 1268   1977Bur/Paw:525       renumbered, B1 and B2 switched
16 B1 1155   1977Bur/Paw:525       renumbered, B1 and B2 switched
17 B1 618   1977Bur/Paw:525       renumbered, B1 and B2 switched
18 B1 461   1977Bur/Paw:525       renumbered, B1 and B2 switched
19 B1 219   1977Bur/Paw:525       renumbered, B1 and B2 switched
20 B1     1977Bur/Paw:525       renumbered, B1 and B2 switched
21 B2 1350   1977Bur/Paw:525       renumbered, B1 and B2 switched
22 B2 1210   1977Bur/Paw:525       renumbered, B1 and B2 switched
23 B2 1008   1977Bur/Paw:525       renumbered, B1 and B2 switched
24 B2 731   1977Bur/Paw:525       renumbered, B1 and B2 switched
25 B2 537   1977Bur/Paw:525       renumbered, B1 and B2 switched
26 B2 337   1977Bur/Paw:525       renumbered, B1 and B2 switched
27 B2 276   1977Bur/Paw:525       renumbered, B1 and B2 switched

Calculated vibrational frequencies for C3F8 (perfluoropropane).
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 C3F8 (perfluoropropane).
Product of moments of inertia moments of inertia
amu3Å6   0gm3 cm6
Geometric Data
picture of perfluoropropane

Point Group


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
rCF 1.330 0.002 1 4 1995Kuchitsu(II/23)
rCC 1.546 0.004 1 2 1995Kuchitsu(II/23)
aCCC 115.9 0.7 2 1 3 1995Kuchitsu(II/23)
aFCF 107 1.3 4 1 5 1995Kuchitsu(II/23)
aFCF 109.3 0.2 6 2 8 1995Kuchitsu(II/23)
aCCF 109.34 0.2 1 2 6 1995Kuchitsu(II/23)

Cartesians
Atom x (Å) y (Å) z (Å)

Atom - Atom Distances bond lengths
Distances in Å
 

Calculated geometries for C3F8 (perfluoropropane).

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
C-C 2
C-F 8

Connectivity
Atom 1 Atom 2
C1 C2
C1 C3
C1 F4
C1 F5
C2 F6
C2 F8
C2 F9
C3 F7
C3 F10
C3 F11
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1A1

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference
13.380       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 1A1 C2v True           C2v 1 2
1 2 1A C2 False          
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 C3F8 (perfluoropropane).
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 1A1 C2v True       C2v 1 2
1 2 1A C2 False      

Calculated electric quadrupole moments for C3F8 (perfluoropropane).
Electric dipole polarizability (Å3) polarizability
alpha unc. Reference
6.525 0.104 2015Tha/Wu:144302

Calculated electric dipole polarizability for C3F8 (perfluoropropane).

References
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squib reference DOI
1977Bur/Paw:525 H BUrger, G Pawelke "Schwingungsspektren und Normalkoordinatenanalyse von CF3-Verbindungen -XXI. 2,2-Dihalogen-hexafluoropropane (CF3)2CX2 (X=F,Cl, Br, J)" Spectrochimica Acta 35A, 525-540, 1979 10.1016/0584-8539(79)80106-3
1995Kuchitsu(II/23) Kuchitsu (ed.), Landolt-Bornstein: Group II: Molecules and Radicals Volume 23: Structure Data for Free Polyatomic Molecules. Springer. Berlin. 1995  
2015Tha/Wu:144302 AJ Thakkar, T Wu "How well do static electronic dipole polarizabilities from gas-phase experiments compare with density functional and MP2 computations?" J. Chem. Phys. 143, 144302 (2015) 10.1063/1.4932594
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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