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

using model chemistry: B3PW91/TZVP

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/TZVP
 hartrees
Energy at 0K-476.792422
Energy at 298.15K-476.796406
HF Energy-476.792422
Nuclear repulsion energy265.951482
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/TZVP
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 3092 2982 0.00      
2 Ag 1462 1409 0.00      
3 Ag 1153 1112 0.00      
4 Ag 1109 1069 0.00      
5 Ag 629 606 0.00      
6 Ag 361 348 0.00      
7 Au 1363 1314 28.54      
8 Au 1145 1104 438.66      
9 Au 208 200 2.75      
10 Au 78 76 2.42      
11 Bg 1393 1344 0.00      
12 Bg 1112 1072 0.00      
13 Bg 482 465 0.00      
14 Bu 3104 2993 42.60      
15 Bu 1327 1279 25.96      
16 Bu 1137 1096 239.33      
17 Bu 546 527 9.51      
18 Bu 413 399 50.99      

Unscaled Zero Point Vibrational Energy (zpe) 10056.3 cm-1
Scaled (by 0.9643) Zero Point Vibrational Energy (zpe) 9697.3 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/TZVP
ABC
0.17064 0.10435 0.06851

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/TZVP

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.244 0.725 0.000
C2 0.244 -0.725 0.000
H3 -1.335 0.790 0.000
H4 1.335 -0.790 0.000
F5 0.244 1.348 1.098
F6 0.244 1.348 -1.098
F7 -0.244 -1.348 1.098
F8 -0.244 -1.348 -1.098

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.52871.09362.18761.35371.35372.34592.3459
C21.52872.18761.09362.34592.34591.35371.3537
H31.09362.18763.10262.00272.00272.64002.6400
H42.18761.09363.10262.64002.64002.00272.0027
F51.35372.34592.00272.64002.19642.74043.5120
F61.35372.34592.00272.64002.19643.51202.7404
F72.34591.35372.64002.00272.74043.51202.1964
F82.34591.35372.64002.00273.51202.74042.1964

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 112.000 C1 C2 F7 108.793
C1 C2 F8 108.793 C2 C1 H3 112.000
C2 C1 F5 108.793 C2 C1 F6 108.793
H3 C1 F5 109.375 H3 C1 F6 109.375
H4 C2 F7 109.375 H4 C2 F8 109.375
F5 C1 F6 108.436 F7 C2 F8 108.436
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.232      
2 C 0.232      
3 H 0.118      
4 H 0.118      
5 F -0.175      
6 F -0.175      
7 F -0.175      
8 F -0.175      


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 -28.653 -3.052 0.000
y -3.052 -35.373 0.000
z 0.000 0.000 -35.880
Traceless
 xyz
x 6.973 -3.052 0.000
y -3.052 -3.106 0.000
z 0.000 0.000 -3.867
Polar
3z2-r2-7.734
x2-y26.720
xy-3.052
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.710 0.066 0.000
y 0.066 3.862 0.000
z 0.000 0.000 4.075


<r2> (average value of r2) Å2
<r2> 143.633
(<r2>)1/2 11.985