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

using model chemistry: PBE1PBE/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 PBE1PBE/cc-pVTZ
 hartrees
Energy at 0K-476.495788
Energy at 298.15K-476.499799
HF Energy-476.495788
Nuclear repulsion energy267.244115
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 PBE1PBE/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 3086 2966 0.00      
2 Ag 1473 1416 0.00      
3 Ag 1172 1127 0.00      
4 Ag 1124 1080 0.00      
5 Ag 636 611 0.00      
6 Ag 364 350 0.00      
7 Au 1355 1302 35.97      
8 Au 1180 1134 396.28      
9 Au 204 196 2.07      
10 Au 80 77 2.05      
11 Bg 1386 1332 0.00      
12 Bg 1144 1099 0.00      
13 Bg 488 469 0.00      
14 Bu 3099 2978 46.87      
15 Bu 1325 1273 24.03      
16 Bu 1162 1117 222.26      
17 Bu 550 528 9.17      
18 Bu 409 393 44.12      

Unscaled Zero Point Vibrational Energy (zpe) 10119.1 cm-1
Scaled (by 0.961) Zero Point Vibrational Energy (zpe) 9724.4 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 PBE1PBE/cc-pVTZ
ABC
0.17218 0.10550 0.06924

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/cc-pVTZ

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.243 0.721 0.000
C2 0.243 -0.721 0.000
H3 -1.335 0.780 0.000
H4 1.335 -0.780 0.000
F5 0.243 1.341 1.093
F6 0.243 1.341 -1.093
F7 -0.243 -1.341 1.093
F8 -0.243 -1.341 -1.093

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.52061.09392.17741.34731.34732.33322.3332
C21.52062.17741.09392.33322.33321.34731.3473
H31.09392.17743.09251.99941.99942.62432.6243
H42.17741.09393.09252.62432.62431.99941.9994
F51.34732.33321.99942.62432.18622.72523.4937
F61.34732.33321.99942.62432.18623.49372.7252
F72.33321.34732.62431.99942.72523.49372.1862
F82.33321.34732.62431.99943.49372.72522.1862

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 111.748 C1 C2 F7 108.745
C1 C2 F8 108.745 C2 C1 H3 111.748
C2 C1 F5 108.745 C2 C1 F6 108.745
H3 C1 F5 109.543 H3 C1 F6 109.543
H4 C2 F7 109.543 H4 C2 F8 109.543
F5 C1 F6 108.451 F7 C2 F8 108.451
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.308      
2 C 0.308      
3 H 0.047      
4 H 0.047      
5 F -0.178      
6 F -0.178      
7 F -0.178      
8 F -0.178      


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 -28.515 -2.660 0.000
y -2.660 -34.576 0.000
z 0.000 0.000 -34.926
Traceless
 xyz
x 6.236 -2.660 0.000
y -2.660 -2.855 0.000
z 0.000 0.000 -3.381
Polar
3z2-r2-6.761
x2-y26.060
xy-2.660
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.800 0.015 0.000
y 0.015 3.972 0.000
z 0.000 0.000 4.061


<r2> (average value of r2) Å2
<r2> 141.980
(<r2>)1/2 11.916