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

using model chemistry: HF/CEP-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 HF/CEP-31G*
 hartrees
Energy at 0K-107.610460
Energy at 298.15K-107.614666
HF Energy-107.610460
Nuclear repulsion energy151.832579
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 HF/CEP-31G*
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 3367 3024 0.00      
2 Ag 1649 1481 0.00      
3 Ag 1274 1144 0.00      
4 Ag 1208 1084 0.00      
5 Ag 678 609 0.00      
6 Ag 389 349 0.00      
7 Au 1493 1341 86.69      
8 Au 1290 1158 485.63      
9 Au 221 199 3.47      
10 Au 88 79 3.41      
11 Bg 1523 1368 0.00      
12 Bg 1260 1132 0.00      
13 Bg 523 470 0.00      
14 Bu 3379 3034 88.11      
15 Bu 1439 1292 55.28      
16 Bu 1246 1119 307.66      
17 Bu 588 528 14.60      
18 Bu 444 399 64.93      

Unscaled Zero Point Vibrational Energy (zpe) 11028.8 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 9903.8 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 HF/CEP-31G*
ABC
0.17428 0.10480 0.06930

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.245 0.726 0.000
C2 0.245 -0.726 0.000
H3 -1.328 0.797 0.000
H4 1.328 -0.797 0.000
F5 0.245 1.344 1.086
F6 0.245 1.344 -1.086
F7 -0.245 -1.344 1.086
F8 -0.245 -1.344 -1.086

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.53351.08572.19031.34191.34192.33822.3382
C21.53352.19031.08572.33822.33821.34191.3419
H31.08572.19033.09851.98851.98852.63402.6340
H42.19031.08573.09852.63402.63401.98851.9885
F51.34192.33821.98852.63402.17132.73303.4905
F61.34192.33821.98852.63402.17133.49052.7330
F72.33821.34192.63401.98852.73303.49052.1713
F82.33821.34192.63401.98853.49052.73302.1713

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 112.372 C1 C2 F7 108.632
C1 C2 F8 108.632 C2 C1 H3 112.372
C2 C1 F5 108.632 C2 C1 F6 108.632
H3 C1 F5 109.548 H3 C1 F6 109.548
H4 C2 F7 109.548 H4 C2 F8 109.548
F5 C1 F6 108.005 F7 C2 F8 108.005
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.304      
2 C 0.304      
3 H 0.165      
4 H 0.165      
5 F -0.234      
6 F -0.234      
7 F -0.234      
8 F -0.234      


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 -28.093 -3.351 0.000
y -3.351 -35.709 0.000
z 0.000 0.000 -36.042
Traceless
 xyz
x 7.783 -3.351 0.000
y -3.351 -3.641 0.000
z 0.000 0.000 -4.142
Polar
3z2-r2-8.284
x2-y27.616
xy-3.351
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.061 0.032 0.000
y 0.032 3.181 0.000
z 0.000 0.000 3.313


<r2> (average value of r2) Å2
<r2> 115.577
(<r2>)1/2 10.751