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

using model chemistry: HSEh1PBE/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-476.374167
Energy at 298.15K-476.378133
HF Energy-476.374167
Nuclear repulsion energy266.613574
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/cc-pVDZ
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 3102 2984 0.00      
2 Ag 1473 1416 0.00      
3 Ag 1171 1126 0.00      
4 Ag 1120 1077 0.00      
5 Ag 630 606 0.00      
6 Ag 362 348 0.00      
7 Au 1348 1297 67.16      
8 Au 1183 1138 380.63      
9 Au 198 190 2.43      
10 Au 76 73 2.08      
11 Bg 1375 1323 0.00      
12 Bg 1148 1105 0.00      
13 Bg 485 467 0.00      
14 Bu 3113 2994 56.58      
15 Bu 1305 1255 32.50      
16 Bu 1158 1114 233.92      
17 Bu 546 525 9.28      
18 Bu 402 386 45.67      

Unscaled Zero Point Vibrational Energy (zpe) 10096.1 cm-1
Scaled (by 0.9619) Zero Point Vibrational Energy (zpe) 9711.4 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 HSEh1PBE/cc-pVDZ
ABC
0.17082 0.10544 0.06903

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/cc-pVDZ

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 -1.344 0.775 0.000
H4 1.344 -0.775 0.000
F5 0.244 1.341 1.097
F6 0.244 1.341 -1.097
F7 -0.244 -1.341 1.097
F8 -0.244 -1.341 -1.097

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.51771.10242.18031.35231.35232.33402.3340
C21.51772.18031.10242.33402.33401.35231.3523
H31.10242.18033.10392.01152.01152.62602.6260
H42.18031.10243.10392.62602.62602.01152.0115
F51.35232.33402.01152.62602.19472.72633.4999
F61.35232.33402.01152.62602.19473.49992.7263
F72.33401.35232.62602.01152.72633.49992.1947
F82.33401.35232.62602.01153.49992.72632.1947

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 111.656 C1 C2 F7 108.686
C1 C2 F8 108.686 C2 C1 H3 111.656
C2 C1 F5 108.686 C2 C1 F6 108.686
H3 C1 F5 109.636 H3 C1 F6 109.636
H4 C2 F7 109.636 H4 C2 F8 109.636
F5 C1 F6 108.476 F7 C2 F8 108.476
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.343      
2 C 0.343      
3 H 0.048      
4 H 0.048      
5 F -0.196      
6 F -0.196      
7 F -0.196      
8 F -0.196      


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 -28.232 -2.482 0.000
y -2.482 -34.327 0.000
z 0.000 0.000 -34.512
Traceless
 xyz
x 6.188 -2.482 0.000
y -2.482 -2.956 0.000
z 0.000 0.000 -3.232
Polar
3z2-r2-6.465
x2-y26.096
xy-2.482
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.391 -0.033 0.000
y -0.033 3.354 0.000
z 0.000 0.000 3.476


<r2> (average value of r2) Å2
<r2> 142.181
(<r2>)1/2 11.924