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

using model chemistry: PBEPBEultrafine/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1AG
Energy calculated at PBEPBEultrafine/6-31G*
 hartrees
Energy at 0K-476.290819
Energy at 298.15K-476.294642
HF Energy-476.290819
Nuclear repulsion energy263.920672
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 PBEPBEultrafine/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Ag 3008 2959 0.00      
2 Ag 1428 1405 0.00      
3 Ag 1122 1104 0.00      
4 Ag 1093 1075 0.00      
5 Ag 603 593 0.00      
6 Ag 345 339 0.00      
7 Au 1340 1318 55.29      
8 Au 1134 1115 336.48      
9 Au 190 187 1.71      
10 Au 80 79 1.58      
11 Bg 1367 1344 0.00      
12 Bg 1098 1080 0.00      
13 Bg 467 460 0.00      
14 Bu 3020 2970 75.43      
15 Bu 1288 1266 29.05      
16 Bu 1114 1096 192.82      
17 Bu 516 508 7.07      
18 Bu 395 389 38.14      

Unscaled Zero Point Vibrational Energy (zpe) 9803.9 cm-1
Scaled (by 0.9835) Zero Point Vibrational Energy (zpe) 9642.1 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 PBEPBEultrafine/6-31G*
ABC
0.16607 0.10403 0.06769

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.245 0.725 0.000
C2 0.245 -0.725 0.000
H3 -1.349 0.782 0.000
H4 1.349 -0.782 0.000
F5 0.245 1.350 1.114
F6 0.245 1.350 -1.114
F7 -0.245 -1.350 1.114
F8 -0.245 -1.350 -1.114

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.53091.10562.19421.36811.36812.35502.3550
C21.53092.19421.10562.35502.35501.36811.3681
H31.10562.19423.11922.02642.02642.64652.6465
H42.19421.10563.11922.64652.64652.02642.0264
F51.36812.35502.02642.64652.22732.74423.5343
F61.36812.35502.02642.64652.22733.53432.7442
F72.35501.36812.64652.02642.74423.53432.2273
F82.35501.36812.64652.02643.53432.74422.2273

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 111.644 C1 C2 F7 108.524
C1 C2 F8 108.524 C2 C1 H3 111.644
C2 C1 F5 108.524 C2 C1 F6 108.524
H3 C1 F5 109.559 H3 C1 F6 109.559
H4 C2 F7 109.559 H4 C2 F8 109.559
F5 C1 F6 108.982 F7 C2 F8 108.982
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.328      
2 C 0.328      
3 H 0.153      
4 H 0.153      
5 F -0.240      
6 F -0.240      
7 F -0.240      
8 F -0.240      


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 -28.350 -2.142 0.000
y -2.142 -33.548 0.000
z 0.000 0.000 -33.751
Traceless
 xyz
x 5.300 -2.142 0.000
y -2.142 -2.497 0.000
z 0.000 0.000 -2.803
Polar
3z2-r2-5.605
x2-y25.198
xy-2.142
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.620 -0.030 0.000
y -0.030 3.679 0.000
z 0.000 0.000 3.770


<r2> (average value of r2) Å2
<r2> 144.234
(<r2>)1/2 12.010