Experimental data for CHF2CHF2 (1,1,2,2-tetrafluoroethane)
22 02 02 11 45
Other names |
Ethane, 1,1,2,2-tetrafluoro-; Freon 134; R 134;
|
INChI |
INChIKey |
SMILES |
IUPAC name |
InChI=1S/C2H2F4/c3-1(4)2(5)6/h1-2H |
WXGNWUVNYMJENI-UHFFFAOYSA-N |
FC(F)C(F)F |
|
State |
Conformation |
1AG |
C2H |
Enthalpy of formation (Hfg),
Entropy,
Integrated heat capacity (0 K to 298.15 K) (HH),
Heat Capacity (Cp)
Property |
Value |
Uncertainty |
units |
Reference |
Comment |
Information can also be found for this species in the
NIST Chemistry Webbook
Vibrational levels (cm-1)
Mode Number |
Symmetry |
Frequency |
Intensity |
Comment |
Description |
Fundamental(cm-1) |
Harmonic(cm-1) |
Reference |
(km mol-1) |
unc. |
Reference |
1 |
Ag |
3004 |
|
2000Cra/Chu:10092-10103 |
|
|
|
|
|
2 |
Ag |
1443 |
|
|
|
|
|
|
|
3 |
Ag |
1145 |
|
|
|
|
|
|
|
4 |
Ag |
1097 |
|
|
|
|
|
|
|
5 |
Ag |
623 |
|
|
|
|
|
|
|
6 |
Ag |
361 |
|
|
|
|
|
|
|
7 |
Au |
1331 |
|
|
|
|
|
|
|
8 |
Au |
1144 |
|
|
|
|
|
|
|
9 |
Au |
210 |
|
|
|
|
|
|
|
10 |
Au |
82 |
|
|
|
|
|
|
|
11 |
Bg |
1362 |
|
|
|
|
|
|
|
12 |
Bg |
1083 |
|
|
|
|
|
|
|
13 |
Bg |
479 |
|
|
|
|
|
|
|
14 |
Bu |
2995 |
|
|
|
|
|
|
|
15 |
Bu |
1309 |
|
|
|
|
|
|
|
16 |
Bu |
1127 |
|
|
|
|
|
|
|
17 |
Bu |
542 |
|
|
|
|
|
|
|
18 |
Bu |
413 |
|
|
|
|
|
|
|
vibrational zero-point energy: 9875.4 cm
-1 (from fundamental vibrations)
Calculated vibrational frequencies for
CHF
2CHF
2 (1,1,2,2-tetrafluoroethane).
Geometric Data
Point Group C2h
Internal coordinates
distances (r) in Å, angles (a) in degrees, dihedrals (d) in degrees
Cartesians
Atom |
x (Å) |
y (Å) |
z (Å) |
C1 |
0.6739 |
0.0000 |
-0.3412 |
C2 |
-0.6739 |
0.0000 |
0.3412 |
H3 |
0.5985 |
0.0000 |
-1.4258 |
H4 |
-0.5985 |
0.0000 |
1.4258 |
F5 |
1.3653 |
1.0953 |
0.0697 |
F6 |
1.3653 |
-1.0953 |
0.0697 |
F7 |
-1.3653 |
1.0953 |
-0.0697 |
F8 |
-1.3653 |
-1.0953 |
-0.0697 |
Atom - Atom Distances
Distances in Å
|
C1 |
C2 |
H3 |
H4 |
F5 |
F6 |
F7 |
F8 |
C1 |
|
1.5107 | 1.0871 | 2.1775 | 1.3589 | 1.3589 | 2.3306 | 2.3306 |
C2 |
1.5107 |
|
2.1775 | 1.0871 | 2.3306 | 2.3306 | 1.3589 | 1.3589 |
H3 |
1.0871 | 2.1775 |
|
3.0926 | 2.0060 | 2.0060 | 2.6259 | 2.6259 |
H4 |
2.1775 | 1.0871 | 3.0926 |
|
2.6259 | 2.6259 | 2.0060 | 2.0060 |
F5 |
1.3589 | 2.3306 | 2.0060 | 2.6259 |
|
2.1907 | 2.7341 | 3.5035 |
F6 |
1.3589 | 2.3306 | 2.0060 | 2.6259 | 2.1907 |
|
3.5035 | 2.7341 |
F7 |
2.3306 | 1.3589 | 2.6259 | 2.0060 | 2.7341 | 3.5035 |
|
2.1907 |
F8 |
2.3306 | 1.3589 | 2.6259 | 2.0060 | 3.5035 | 2.7341 | 2.1907 |
|
Calculated geometries
for CHF
2CHF
2 (1,1,2,2-tetrafluoroethane).
Experimental Bond Angles (degrees) from cartesians
atom1 |
atom2 |
atom3 |
angle |
|
atom1 |
atom2 |
atom3 |
angle |
C1 |
C2 |
H4 |
112.880 |
|
C1 |
C2 |
F7 |
108.500 |
C1 |
C2 |
F8 |
108.500 |
|
C2 |
C1 |
H3 |
112.880 |
C2 |
C1 |
F5 |
108.500 |
|
C2 |
C1 |
F6 |
108.500 |
H3 |
C1 |
F5 |
109.690 |
|
H3 |
C1 |
F6 |
109.690 |
H4 |
C2 |
F7 |
109.690 |
|
H4 |
C2 |
F8 |
109.690 |
F5 |
C1 |
F6 |
107.424 |
|
F7 |
C2 |
F8 |
107.424 |
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 |
H-C |
2 |
C-F |
4 |
Connectivity
Atom 1 |
Atom 2 |
C1 |
C2 |
C1 |
H3 |
C1 |
F5 |
C1 |
F6 |
C2 |
H4 |
C2 |
F7 |
C2 |
F8 |
Electronic energy levels (cm-1)
Energy (cm-1) |
Degeneracy |
reference |
description |
0 |
1 |
|
1AG |
Dipole, Quadrupole and Polarizability
Electric dipole moment
State |
Config |
State description |
Conf description |
Exp. min. |
Dipole (Debye) |
Reference |
comment |
Point Group |
Components |
x |
y |
z |
total |
dipole |
quadrupole |
1 |
1 |
1AG |
C2h |
True |
|
|
|
0.000 |
|
symmetry |
C2h |
0 |
3 |
1 |
2 |
1A |
C2 |
|
|
|
2.454 |
2.454 |
2000Mat/Wal:9489-9493 |
± 0.002 D MW μ0 |
C2 |
1 |
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
CHF
2CHF
2 (1,1,2,2-tetrafluoroethane).
Electric quadrupole moment
State |
Config |
State description |
Conf description |
Exp. min. |
Quadrupole (D Å) |
Reference |
comment |
Point Group |
Components |
xx |
yy |
zz |
dipole |
quadrupole |
1 |
1 |
1AG |
C2h |
True |
|
|
|
|
|
C2h |
0 |
3 |
1 |
2 |
1A |
C2 |
|
|
|
|
|
|
C2 |
1 |
3 |
Calculated electric quadrupole moments for
CHF
2CHF
2 (1,1,2,2-tetrafluoroethane).
References
By selecting the following links, you may be leaving NIST webspace.
We have provided these links to other web sites because they may have information that would be of interest to you.
No inferences should be drawn on account of other sites being referenced, or not, from this page.
There may be other web sites that are more appropriate for your purpose.
NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites.
Further, NIST does not endorse any commercial products that may be mentioned on these sites.
Please address comments about this page to
[email protected].
squib |
reference |
DOI |
2000Cra/Chu:10092-10103 |
NC Craig, JI Chuang, CC Nwofor, CM Oertel "Synthesis and Vibrational Spectroscopy of 1,1,2,2-Tetrafluoroethane and Its 13C2 and d2 Isotopomers" J. Phys. Chem. A 2000, 104, 10092-10103 |
10.1021/jp0004967 |
2000Mat/Wal:9489-9493 |
B Mate, AH Walker, RD Suenram, NC Craig "Complete Structure of Gauche 1,1,2,2-Tetrafluoroethane Determined by Microwave Spectroscopy" J. Phys. Chem. A 2000, 104, 9489-9493 |
10.1021/jp001913i |
2001Cra/Oer:6008-6019 |
NC Craig, CM Oertel, DC Oertel, M Lock "Complete Structure of anti-1,1,2,2-Tetrafluoroethane by High-Resolution Infrared Spectroscopy" J. Phys. Chem. A 2001, 105, 6008-6019 |
10.1021/jp010539z |
Got a better number? Please email us at
[email protected]