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Experimental data for CF3COOH (trifluoroacetic acid)

22 02 02 11 45
Other names
Perfluoroacetic acid; Acetic acid, trifluoro-; Trifluoroethanoic acid; 2,2,2-Trifluoroacetic acid;
INChI INChIKey SMILES IUPAC name
InChI=1S/C2HF3O2/c3-2(4,5)1(6)7/h(H,6,7) DTQVDTLACAAQTR-UHFFFAOYSA-N OC(C(F)(F)F)=O 2,2,2-Trifluoroacetic acid
State Conformation
1A' CS
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 -1018.00 4.60 kJ mol-1 webbook
Hfg(0K) enthalpy of formation   4.60 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

Calculated vibrational frequencies for CF3COOH (trifluoroacetic acid).
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 CF3COOH (trifluoroacetic acid).
Product of moments of inertia moments of inertia
amu3Å6   0gm3 cm6
Geometric Data
picture of trifluoroacetic acid

Point Group Cs


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 1.325 0.003 1 5 1987Kuchitsu(II/15)
rCC 1.546 0.005 1 2 1987Kuchitsu(II/15) ra
rCO 1.192 0.003 2 4 1987Kuchitsu(II/15) ra
rCO 1.353 0.014 2 3 1987Kuchitsu(II/15)
rOH 0.960   3 8 1987Kuchitsu(II/15) assumed
aCCO 126.8 0.8 1 2 4 1987Kuchitsu(II/15)
aCCO 111.1 0.9 1 2 3 1987Kuchitsu(II/15)
aHOC 107 1 2 3 1987Kuchitsu(II/15) assumed
aCCF 109.5 0.3 2 1 5 1987Kuchitsu(II/15)
aFCF 109.4 0.3 5 1 6 1987Kuchitsu(II/15)

These cartesians were determined using some assumed coordinate values. Cartesians
Atom x (Å) y (Å) z (Å)
C1 0.0912 0.6158 0.0000
C2 -0.2945 -0.8813 0.0000
O3 0.8063 -1.6679 0.0000
O4 -1.3969 -1.3346 0.0000
F5 -1.0079 1.3557 0.0000
F6 0.8063 0.8883 1.0817
F7 0.8063 0.8883 -1.0817
H8 0.5010 -2.5780 0.0000

Atom - Atom Distances bond lengths
Distances in Å
  C1 C2 O3 O4 F5 F6 F7 H8
C1   1.54602.39312.45331.32501.32501.32503.2200
C2 1.5460   1.35301.19202.34802.34802.34801.8740
O3 2.39311.3530   2.22833.52622.77562.77560.9600
O4 2.45331.19202.2283   2.71833.31153.31152.2690
F5 1.32502.34803.52622.7183   2.16332.16334.2132
F6 1.32502.34802.77563.31152.1633   2.16333.6440
F7 1.32502.34802.77563.31152.16332.1633   3.6440
H8 3.22001.87400.96002.26904.21323.64403.6440  

Calculated geometries for CF3COOH (trifluoroacetic acid).

Experimental Bond Angles (degrees) from cartesians bond angles

atom1 atom2 atom3 angle         atom1 atom2 atom3 angle
C1 C2 O3 111.100 C1 C2 O4 126.800
C2 C1 F5 109.500 C2 C1 F6 109.500
C2 C1 F7 109.500 C2 O3 H8 107.000
O3 C2 O4 122.100 F5 C1 F6 109.442
F5 C1 F7 109.442 F6 C1 F7 109.442

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
C-C 1
C-O 1
C=O 1
C-F 3
H-O 1

Connectivity
Atom 1 Atom 2
C1 C2
C1 F5
C1 F6
C1 F7
C2 O3
C2 O4
O3 H8
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1A'

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference
11.500       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 1A' Cs True       2.280 NSRDS-NBS10 DR Cs 2 3
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 CF3COOH (trifluoroacetic acid).
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 1A' Cs True       Cs 2 3

Calculated electric quadrupole moments for CF3COOH (trifluoroacetic acid).

References
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squib reference DOI
1987Kuchitsu(II/15) Kuchitsu (ed.), Landolt-Bornstein: Group II: Atomic and Molecular Physics Volume 15: Structure Data of Free Polyatomic Molecules. Springer-Verlag, Berlin, 1987.  
NSRDS-NBS10 R. D. Nelson Jr., D. R. Lide, A. A. Maryott "Selected Values of electric dipole moments for molecules in the gas phase" NSRDS-NBS10, 1967 10.6028/NBS.NSRDS.10
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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