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

using model chemistry: B3LYP/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-476.975714
Energy at 298.15K-476.979672
HF Energy-476.975714
Nuclear repulsion energy265.375354
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/aug-cc-pVTZ
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 3084 2984 0.00      
2 Ag 1453 1405 0.00      
3 Ag 1142 1105 0.00      
4 Ag 1102 1067 0.00      
5 Ag 620 600 0.00      
6 Ag 357 346 0.00      
7 Au 1344 1300 18.10      
8 Au 1119 1083 428.71      
9 Au 206 199 1.93      
10 Au 80 77 2.26      
11 Bg 1374 1329 0.00      
12 Bg 1085 1050 0.00      
13 Bg 478 462 0.00      
14 Bu 3096 2995 34.92      
15 Bu 1323 1280 22.29      
16 Bu 1119 1083 225.06      
17 Bu 537 519 8.88      
18 Bu 413 399 46.77      

Unscaled Zero Point Vibrational Energy (zpe) 9965.2 cm-1
Scaled (by 0.9675) Zero Point Vibrational Energy (zpe) 9641.3 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 B3LYP/aug-cc-pVTZ
ABC
0.16999 0.10389 0.06823

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/aug-cc-pVTZ

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.246 0.723 0.000
C2 0.246 -0.723 0.000
H3 -1.334 0.791 0.000
H4 1.334 -0.791 0.000
F5 0.246 1.352 1.100
F6 0.246 1.352 -1.100
F7 -0.246 -1.352 1.100
F8 -0.246 -1.352 -1.100

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.52761.09102.18841.35881.35882.34852.3485
C21.52762.18841.09102.34852.34851.35881.3588
H31.09102.18843.10242.00522.00522.64322.6432
H42.18841.09103.10242.64322.64322.00522.0052
F51.35882.34852.00522.64322.20042.74743.5200
F61.35882.34852.00522.64322.20043.52002.7474
F72.34851.35882.64322.00522.74743.52002.2004
F82.34851.35882.64322.00523.52002.74742.2004

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 112.307 C1 C2 F7 108.766
C1 C2 F8 108.766 C2 C1 H3 112.307
C2 C1 F5 108.766 C2 C1 F6 108.766
H3 C1 F5 109.389 H3 C1 F6 109.389
H4 C2 F7 109.389 H4 C2 F8 109.389
F5 C1 F6 108.131 F7 C2 F8 108.131
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.514      
2 C 0.514      
3 H 0.255      
4 H 0.255      
5 F -0.384      
6 F -0.384      
7 F -0.384      
8 F -0.384      


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 -28.982 -3.028 0.000
y -3.028 -35.533 0.000
z 0.000 0.000 -36.039
Traceless
 xyz
x 6.804 -3.028 0.000
y -3.028 -3.022 0.000
z 0.000 0.000 -3.781
Polar
3z2-r2-7.563
x2-y26.551
xy-3.028
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.373 0.074 0.000
y 0.074 4.754 0.000
z 0.000 0.000 4.825


<r2> (average value of r2) Å2
<r2> 144.261
(<r2>)1/2 12.011