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

using model chemistry: B1B95/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 B1B95/TZVP
 hartrees
Energy at 0K-476.847930
Energy at 298.15K-476.851922
HF Energy-476.847930
Nuclear repulsion energy267.120632
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 B1B95/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 3116 2982 0.00      
2 Ag 1475 1412 0.00      
3 Ag 1168 1118 0.00      
4 Ag 1118 1070 0.00      
5 Ag 634 607 0.00      
6 Ag 361 345 0.00      
7 Au 1371 1312 34.46      
8 Au 1169 1119 438.34      
9 Au 202 193 2.82      
10 Au 78 75 2.58      
11 Bg 1402 1341 0.00      
12 Bg 1134 1085 0.00      
13 Bg 486 465 0.00      
14 Bu 3128 2993 40.93      
15 Bu 1332 1274 27.34      
16 Bu 1154 1105 244.55      
17 Bu 550 526 10.32      
18 Bu 410 393 52.19      

Unscaled Zero Point Vibrational Energy (zpe) 10144.4 cm-1
Scaled (by 0.9569) Zero Point Vibrational Energy (zpe) 9707.1 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 B1B95/TZVP
ABC
0.17209 0.10533 0.06915

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/TZVP

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.243 0.721 0.000
C2 0.243 -0.721 0.000
H3 -1.332 0.785 0.000
H4 1.332 -0.785 0.000
F5 0.243 1.342 1.093
F6 0.243 1.342 -1.093
F7 -0.243 -1.342 1.093
F8 -0.243 -1.342 -1.093

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.52271.09022.17931.34791.34792.33512.3351
C21.52272.17931.09022.33512.33511.34791.3479
H31.09022.17933.09151.99641.99642.62742.6274
H42.17931.09023.09152.62742.62741.99641.9964
F51.34792.33511.99642.62742.18672.72733.4957
F61.34792.33511.99642.62742.18673.49572.7273
F72.33511.34792.62741.99642.72733.49572.1867
F82.33511.34792.62741.99643.49572.72732.1867

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 111.969 C1 C2 F7 108.711
C1 C2 F8 108.711 C2 C1 H3 111.969
C2 C1 F5 108.711 C2 C1 F6 108.711
H3 C1 F5 109.481 H3 C1 F6 109.481
H4 C2 F7 109.481 H4 C2 F8 109.481
F5 C1 F6 108.416 F7 C2 F8 108.416
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.232      
2 C 0.232      
3 H 0.121      
4 H 0.121      
5 F -0.177      
6 F -0.177      
7 F -0.177      
8 F -0.177      


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 -28.602 -3.075 0.000
y -3.075 -35.318 0.000
z 0.000 0.000 -35.856
Traceless
 xyz
x 6.985 -3.075 0.000
y -3.075 -3.089 0.000
z 0.000 0.000 -3.896
Polar
3z2-r2-7.791
x2-y26.716
xy-3.075
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.680 0.061 0.000
y 0.061 3.813 0.000
z 0.000 0.000 4.015


<r2> (average value of r2) Å2
<r2> 142.489
(<r2>)1/2 11.937