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

using model chemistry: B3LYP/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 B3LYP/TZVP
 hartrees
Energy at 0K-476.974113
Energy at 298.15K-476.978077
HF Energy-476.974113
Nuclear repulsion energy265.104938
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 B3LYP/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 3094 2987 0.00      
2 Ag 1457 1407 0.00      
3 Ag 1140 1101 0.00      
4 Ag 1103 1065 0.00      
5 Ag 622 600 0.00      
6 Ag 359 347 0.00      
7 Au 1362 1315 24.39      
8 Au 1119 1081 438.24      
9 Au 209 202 2.87      
10 Au 78 75 2.54      
11 Bg 1392 1344 0.00      
12 Bg 1088 1050 0.00      
13 Bg 479 463 0.00      
14 Bu 3106 2998 39.70      
15 Bu 1328 1282 26.04      
16 Bu 1118 1080 238.12      
17 Bu 540 521 9.39      
18 Bu 416 402 53.17      

Unscaled Zero Point Vibrational Energy (zpe) 10004.7 cm-1
Scaled (by 0.9654) Zero Point Vibrational Energy (zpe) 9658.5 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 B3LYP/TZVP
ABC
0.16942 0.10379 0.06809

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/TZVP

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.245 0.724 0.000
C2 0.245 -0.724 0.000
H3 -1.335 0.792 0.000
H4 1.335 -0.792 0.000
F5 0.245 1.352 1.102
F6 0.245 1.352 -1.102
F7 -0.245 -1.352 1.102
F8 -0.245 -1.352 -1.102

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.52981.09182.19051.36001.36002.35102.3510
C21.52982.19051.09182.35102.35101.36001.3600
H31.09182.19053.10492.00642.00642.64602.6460
H42.19051.09183.10492.64602.64602.00642.0064
F51.36002.35102.00642.64602.20442.74853.5233
F61.36002.35102.00642.64602.20443.52332.7485
F72.35101.36002.64602.00642.74853.52332.2044
F82.35101.36002.64602.00643.52332.74852.2044

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 112.274 C1 C2 F7 108.749
C1 C2 F8 108.749 C2 C1 H3 112.274
C2 C1 F5 108.749 C2 C1 F6 108.749
H3 C1 F5 109.353 H3 C1 F6 109.353
H4 C2 F7 109.353 H4 C2 F8 109.353
F5 C1 F6 108.277 F7 C2 F8 108.277
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.249      
2 C 0.249      
3 H 0.122      
4 H 0.122      
5 F -0.185      
6 F -0.185      
7 F -0.185      
8 F -0.185      


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 -28.885 -3.137 0.000
y -3.137 -35.771 0.000
z 0.000 0.000 -36.270
Traceless
 xyz
x 7.136 -3.137 0.000
y -3.137 -3.193 0.000
z 0.000 0.000 -3.942
Polar
3z2-r2-7.884
x2-y26.886
xy-3.137
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.736 0.066 0.000
y 0.066 3.905 0.000
z 0.000 0.000 4.121


<r2> (average value of r2) Å2
<r2> 144.578
(<r2>)1/2 12.024