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

using model chemistry: PBE1PBE/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 PBE1PBE/6-31G
 hartrees
Energy at 0K-476.188663
Energy at 298.15K-476.192545
HF Energy-476.188663
Nuclear repulsion energy261.940883
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/6-31G
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 3192 3051 0.00      
2 Ag 1477 1412 0.00      
3 Ag 1188 1136 0.00      
4 Ag 1089 1041 0.00      
5 Ag 597 571 0.00      
6 Ag 347 332 0.00      
7 Au 1373 1312 27.79      
8 Au 1156 1105 290.66      
9 Au 196 187 3.86      
10 Au 85 81 3.20      
11 Bg 1401 1339 0.00      
12 Bg 1112 1063 0.00      
13 Bg 476 455 0.00      
14 Bu 3205 3063 25.08      
15 Bu 1332 1273 19.68      
16 Bu 1112 1063 171.87      
17 Bu 503 481 15.59      
18 Bu 405 387 67.51      

Unscaled Zero Point Vibrational Energy (zpe) 10122.6 cm-1
Scaled (by 0.9559) Zero Point Vibrational Energy (zpe) 9676.2 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/6-31G
ABC
0.16135 0.10409 0.06697

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-31G

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.253 0.710 0.000
C2 0.253 -0.710 0.000
H3 -1.340 0.777 0.000
H4 1.340 -0.777 0.000
F5 0.253 1.351 1.130
F6 0.253 1.351 -1.130
F7 -0.253 -1.351 1.130
F8 -0.253 -1.351 -1.130

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.50821.08892.17881.39401.39402.35072.3507
C21.50822.17881.08892.35072.35071.39401.3940
H31.08892.17883.09692.03552.03552.64272.6427
H42.17881.08893.09692.64272.64272.03552.0355
F51.39402.35072.03552.64272.26092.74813.5586
F61.39402.35072.03552.64272.26093.55862.7481
F72.35071.39402.64272.03552.74813.55862.2609
F82.35071.39402.64272.03553.55862.74812.2609

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 113.060 C1 C2 F7 108.125
C1 C2 F8 108.125 C2 C1 H3 113.060
C2 C1 F5 108.125 C2 C1 F6 108.125
H3 C1 F5 109.519 H3 C1 F6 109.519
H4 C2 F7 109.519 H4 C2 F8 109.519
F5 C1 F6 108.378 F7 C2 F8 108.378
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.386      
2 C 0.386      
3 H 0.219      
4 H 0.219      
5 F -0.303      
6 F -0.303      
7 F -0.303      
8 F -0.303      


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 -28.061 -3.340 0.000
y -3.340 -35.946 0.000
z 0.000 0.000 -36.497
Traceless
 xyz
x 8.160 -3.340 0.000
y -3.340 -3.666 0.000
z 0.000 0.000 -4.494
Polar
3z2-r2-8.987
x2-y27.884
xy-3.340
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.961 0.091 0.000
y 0.091 3.038 0.000
z 0.000 0.000 3.538


<r2> (average value of r2) Å2
<r2> 146.515
(<r2>)1/2 12.104