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

using model chemistry: HSEh1PBE/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1AG
Energy calculated at HSEh1PBE/6-31G**
 hartrees
Energy at 0K-476.346283
Energy at 298.15K-476.350268
HF Energy-476.346283
Nuclear repulsion energy266.861317
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 HSEh1PBE/6-31G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Ag 3111 2968 0.00      
2 Ag 1495 1426 0.00      
3 Ag 1180 1126 0.00      
4 Ag 1139 1087 0.00      
5 Ag 632 603 0.00      
6 Ag 361 344 0.00      
7 Au 1388 1325 65.16      
8 Au 1205 1150 345.36      
9 Au 198 189 2.01      
10 Au 83 79 2.03      
11 Bg 1417 1352 0.00      
12 Bg 1171 1118 0.00      
13 Bg 491 468 0.00      
14 Bu 3122 2979 62.37      
15 Bu 1331 1270 32.09      
16 Bu 1174 1120 212.37      
17 Bu 541 517 9.16      
18 Bu 411 392 44.36      

Unscaled Zero Point Vibrational Energy (zpe) 10223.0 cm-1
Scaled (by 0.9543) Zero Point Vibrational Energy (zpe) 9755.8 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 HSEh1PBE/6-31G**
ABC
0.17028 0.10610 0.06920

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-31G**

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.244 0.719 0.000
C2 0.244 -0.719 0.000
H3 -1.338 0.773 0.000
H4 1.338 -0.773 0.000
F5 0.244 1.337 1.099
F6 0.244 1.337 -1.099
F7 -0.244 -1.337 1.099
F8 -0.244 -1.337 -1.099

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.51781.09582.17411.35191.35192.33092.3309
C21.51782.17411.09582.33092.33091.35191.3519
H31.09582.17413.09042.00682.00682.61862.6186
H42.17411.09583.09042.61862.61862.00682.0068
F51.35192.33092.00682.61862.19882.71713.4953
F61.35192.33092.00682.61862.19883.49532.7171
F72.33091.35192.61862.00682.71713.49532.1988
F82.33091.35192.61862.00683.49532.71712.1988

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 111.558 C1 C2 F7 108.494
C1 C2 F8 108.494 C2 C1 H3 111.558
C2 C1 F5 108.494 C2 C1 F6 108.494
H3 C1 F5 109.704 H3 C1 F6 109.704
H4 C2 F7 109.704 H4 C2 F8 109.704
F5 C1 F6 108.830 F7 C2 F8 108.830
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.425      
2 C 0.425      
3 H 0.131      
4 H 0.131      
5 F -0.278      
6 F -0.278      
7 F -0.278      
8 F -0.278      


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 -28.081 -2.372 0.000
y -2.372 -33.756 0.000
z 0.000 0.000 -34.044
Traceless
 xyz
x 5.819 -2.372 0.000
y -2.372 -2.694 0.000
z 0.000 0.000 -3.125
Polar
3z2-r2-6.250
x2-y25.675
xy-2.372
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.480 -0.030 0.000
y -0.030 3.478 0.000
z 0.000 0.000 3.568


<r2> (average value of r2) Å2
<r2> 141.604
(<r2>)1/2 11.900