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

using model chemistry: PBE1PBE/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1AG
Energy calculated at PBE1PBE/cc-pVDZ
 hartrees
Energy at 0K-476.333929
Energy at 298.15K-476.337898
HF Energy-476.333929
Nuclear repulsion energy266.728784
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 PBE1PBE/cc-pVDZ
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 3103 2983 0.00      
2 Ag 1474 1418 0.00      
3 Ag 1173 1128 0.00      
4 Ag 1122 1078 0.00      
5 Ag 632 607 0.00      
6 Ag 362 348 0.00      
7 Au 1349 1297 70.19      
8 Au 1188 1143 377.83      
9 Au 197 189 2.38      
10 Au 75 72 2.12      
11 Bg 1376 1323 0.00      
12 Bg 1154 1109 0.00      
13 Bg 486 467 0.00      
14 Bu 3114 2994 55.78      
15 Bu 1306 1255 32.78      
16 Bu 1162 1117 233.99      
17 Bu 547 526 9.38      
18 Bu 402 386 45.46      

Unscaled Zero Point Vibrational Energy (zpe) 10110.2 cm-1
Scaled (by 0.9615) Zero Point Vibrational Energy (zpe) 9720.9 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 PBE1PBE/cc-pVDZ
ABC
0.17102 0.10549 0.06908

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/cc-pVDZ

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.243 0.719 0.000
C2 0.243 -0.719 0.000
H3 -1.344 0.776 0.000
H4 1.344 -0.776 0.000
F5 0.243 1.341 1.097
F6 0.243 1.341 -1.097
F7 -0.243 -1.341 1.097
F8 -0.243 -1.341 -1.097

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.51811.10252.18041.35141.35142.33362.3336
C21.51812.18041.10252.33362.33361.35141.3514
H31.10252.18043.10412.01072.01072.62572.6257
H42.18041.10253.10412.62572.62572.01072.0107
F51.35142.33362.01072.62572.19342.72543.4984
F61.35142.33362.01072.62572.19343.49842.7254
F72.33361.35142.62572.01072.72543.49842.1934
F82.33361.35142.62572.01073.49842.72542.1934

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 111.637 C1 C2 F7 108.690
C1 C2 F8 108.690 C2 C1 H3 111.637
C2 C1 F5 108.690 C2 C1 F6 108.690
H3 C1 F5 109.633 H3 C1 F6 109.633
H4 C2 F7 109.633 H4 C2 F8 109.633
F5 C1 F6 108.493 F7 C2 F8 108.493
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.345      
2 C 0.345      
3 H 0.048      
4 H 0.048      
5 F -0.197      
6 F -0.197      
7 F -0.197      
8 F -0.197      


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 -28.232 -2.476 0.000
y -2.476 -34.316 0.000
z 0.000 0.000 -34.503
Traceless
 xyz
x 6.177 -2.476 0.000
y -2.476 -2.948 0.000
z 0.000 0.000 -3.229
Polar
3z2-r2-6.459
x2-y26.084
xy-2.476
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.384 -0.033 0.000
y -0.033 3.348 0.000
z 0.000 0.000 3.468


<r2> (average value of r2) Å2
<r2> 142.087
(<r2>)1/2 11.920