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

using model chemistry: HF/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1AG
Energy calculated at HF/6-31+G**
 hartrees
Energy at 0K-474.672759
Energy at 298.15K-474.677008
HF Energy-474.672759
Nuclear repulsion energy269.172562
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 HF/6-31+G**
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 3322 3004 0.00      
2 Ag 1636 1479 0.00      
3 Ag 1272 1150 0.00      
4 Ag 1212 1096 0.00      
5 Ag 677 612 0.00      
6 Ag 390 352 0.00      
7 Au 1492 1349 61.05      
8 Au 1280 1158 473.25      
9 Au 223 202 3.02      
10 Au 93 85 3.41      
11 Bg 1524 1378 0.00      
12 Bg 1250 1130 0.00      
13 Bg 528 477 0.00      
14 Bu 3332 3013 41.58      
15 Bu 1447 1308 44.96      
16 Bu 1242 1123 300.43      
17 Bu 586 530 14.46      
18 Bu 455 411 65.97      

Unscaled Zero Point Vibrational Energy (zpe) 10980.2 cm-1
Scaled (by 0.9042) Zero Point Vibrational Energy (zpe) 9928.3 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 HF/6-31+G**
ABC
0.17541 0.10663 0.07023

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31+G**

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.244 0.717 0.000
C2 0.244 -0.717 0.000
H3 -1.321 0.788 0.000
H4 1.321 -0.788 0.000
F5 0.244 1.333 1.082
F6 0.244 1.333 -1.082
F7 -0.244 -1.333 1.082
F8 -0.244 -1.333 -1.082

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.51561.07922.17161.33751.33752.31842.3184
C21.51562.17161.07922.31842.31841.33751.3375
H31.07922.17163.07641.97981.97982.61302.6130
H42.17161.07923.07642.61302.61301.97981.9798
F51.33752.31841.97982.61302.16462.71023.4685
F61.33752.31841.97982.61302.16463.46852.7102
F72.31841.33752.61301.97982.71023.46852.1646
F82.31841.33752.61301.97983.46852.71022.1646

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 112.539 C1 C2 F7 108.532
C1 C2 F8 108.532 C2 C1 H3 112.539
C2 C1 F5 108.532 C2 C1 F6 108.532
H3 C1 F5 109.548 H3 C1 F6 109.548
H4 C2 F7 109.548 H4 C2 F8 109.548
F5 C1 F6 108.033 F7 C2 F8 108.033
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.634      
2 C 0.634      
3 H 0.151      
4 H 0.151      
5 F -0.393      
6 F -0.393      
7 F -0.393      
8 F -0.393      


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 -28.368 -3.446 0.000
y -3.446 -35.806 0.000
z 0.000 0.000 -36.360
Traceless
 xyz
x 7.715 -3.446 0.000
y -3.446 -3.442 0.000
z 0.000 0.000 -4.273
Polar
3z2-r2-8.547
x2-y27.438
xy-3.446
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.539 0.055 0.000
y 0.055 3.643 0.000
z 0.000 0.000 3.782


<r2> (average value of r2) Å2
<r2> 140.829
(<r2>)1/2 11.867