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

using model chemistry: B3PW91/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1AG
Energy calculated at B3PW91/6-311G**
 hartrees
Energy at 0K-476.733420
Energy at 298.15K-476.737391
HF Energy-476.733420
Nuclear repulsion energy266.166226
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 B3PW91/6-311G**
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 3100 2985 0.00      
2 Ag 1466 1412 0.00      
3 Ag 1158 1115 0.00      
4 Ag 1114 1073 0.00      
5 Ag 626 603 0.00      
6 Ag 360 347 0.00      
7 Au 1364 1314 39.56      
8 Au 1153 1111 414.59      
9 Au 203 195 2.53      
10 Au 79 76 2.29      
11 Bg 1391 1339 0.00      
12 Bg 1120 1079 0.00      
13 Bg 483 465 0.00      
14 Bu 3111 2996 50.93      
15 Bu 1318 1269 28.34      
16 Bu 1140 1098 240.37      
17 Bu 543 523 9.51      
18 Bu 408 393 49.10      

Unscaled Zero Point Vibrational Energy (zpe) 10067.9 cm-1
Scaled (by 0.9631) Zero Point Vibrational Energy (zpe) 9696.4 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 B3PW91/6-311G**
ABC
0.17039 0.10490 0.06871

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-311G**

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.244 0.721 0.000
C2 0.244 -0.721 0.000
H3 -1.336 0.784 0.000
H4 1.336 -0.784 0.000
F5 0.244 1.345 1.099
F6 0.244 1.345 -1.099
F7 -0.244 -1.345 1.099
F8 -0.244 -1.345 -1.099

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.52241.09352.18181.35471.35472.34002.3400
C21.52242.18181.09352.34002.34001.35471.3547
H31.09352.18183.09752.00462.00462.63262.6326
H42.18181.09353.09752.63262.63262.00462.0046
F51.35472.34002.00462.63262.19802.73363.5077
F61.35472.34002.00462.63262.19803.50772.7336
F72.34001.35472.63262.00462.73363.50772.1980
F82.34001.35472.63262.00463.50772.73362.1980

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 111.993 C1 C2 F7 108.702
C1 C2 F8 108.702 C2 C1 H3 111.993
C2 C1 F5 108.702 C2 C1 F6 108.702
H3 C1 F5 109.468 H3 C1 F6 109.468
H4 C2 F7 109.468 H4 C2 F8 109.468
F5 C1 F6 108.437 F7 C2 F8 108.437
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.322      
2 C 0.322      
3 H 0.123      
4 H 0.123      
5 F -0.223      
6 F -0.223      
7 F -0.223      
8 F -0.223      


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 -28.301 -2.730 0.000
y -2.730 -34.783 0.000
z 0.000 0.000 -35.117
Traceless
 xyz
x 6.649 -2.730 0.000
y -2.730 -3.074 0.000
z 0.000 0.000 -3.575
Polar
3z2-r2-7.150
x2-y26.482
xy-2.730
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.410 -0.015 0.000
y -0.015 3.473 0.000
z 0.000 0.000 3.633


<r2> (average value of r2) Å2
<r2> 142.928
(<r2>)1/2 11.955