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All results from a given calculation for CHF2CHF2 (1,1,2,2-tetrafluoroethane)

using model chemistry: PBEPBE/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1AG
Energy calculated at PBEPBE/aug-cc-pVTZ
 hartrees
Energy at 0K-476.504782
Energy at 298.15K-476.508609
HF Energy-476.504782
Nuclear repulsion energy263.650605
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 PBEPBE/aug-cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Ag 2995 2975 0.00      
2 Ag 1390 1381 0.00      
3 Ag 1100 1093 0.00      
4 Ag 1066 1059 0.00      
5 Ag 600 596 0.00      
6 Ag 346 343 0.00      
7 Au 1284 1276 14.69      
8 Au 1078 1071 421.48      
9 Au 197 196 1.63      
10 Au 76 76 1.89      
11 Bg 1313 1305 0.00      
12 Bg 1039 1032 0.00      
13 Bg 460 457 0.00      
14 Bu 3006 2987 38.86      
15 Bu 1268 1260 17.50      
16 Bu 1083 1076 208.83      
17 Bu 518 515 7.43      
18 Bu 394 391 40.84      

Unscaled Zero Point Vibrational Energy (zpe) 9605.4 cm-1
Scaled (by 0.9935) Zero Point Vibrational Energy (zpe) 9543.0 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 PBEPBE/aug-cc-pVTZ
ABC
0.16735 0.10284 0.06741

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/aug-cc-pVTZ

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.247 0.726 0.000
C2 0.247 -0.726 0.000
H3 -1.346 0.795 0.000
H4 1.346 -0.795 0.000
F5 0.247 1.358 1.109
F6 0.247 1.358 -1.109
F7 -0.247 -1.358 1.109
F8 -0.247 -1.358 -1.109

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.53411.10162.20281.36851.36852.36132.3613
C21.53412.20281.10162.36132.36131.36851.3685
H31.10162.20283.12712.02102.02102.66022.6602
H42.20281.10163.12712.66022.66022.02102.0210
F51.36852.36132.02102.66022.21792.76143.5418
F61.36852.36132.02102.66022.21793.54182.7614
F72.36131.36852.66022.02102.76143.54182.2179
F82.36131.36852.66022.02103.54182.76142.2179

picture of 1,1,2,2-tetrafluoroethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 112.349 C1 C2 F7 108.746
C1 C2 F8 108.746 C2 C1 H3 112.349
C2 C1 F5 108.746 C2 C1 F6 108.746
H3 C1 F5 109.330 H3 C1 F6 109.330
H4 C2 F7 109.330 H4 C2 F8 109.330
F5 C1 F6 108.251 F7 C2 F8 108.251
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.440      
2 C 0.440      
3 H 0.236      
4 H 0.236      
5 F -0.338      
6 F -0.338      
7 F -0.338      
8 F -0.338      


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 -29.237 -2.850 0.000
y -2.850 -35.393 0.000
z 0.000 0.000 -35.862
Traceless
 xyz
x 6.390 -2.850 0.000
y -2.850 -2.843 0.000
z 0.000 0.000 -3.547
Polar
3z2-r2-7.094
x2-y26.156
xy-2.850
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.652 0.075 0.000
y 0.075 5.071 0.000
z 0.000 0.000 5.144


<r2> (average value of r2) Å2
<r2> 145.769
(<r2>)1/2 12.073