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

using model chemistry: PBE1PBE/aug-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/aug-cc-pVDZ
 hartrees
Energy at 0K-476.380233
Energy at 298.15K-476.384191
HF Energy-476.380233
Nuclear repulsion energy265.819479
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/aug-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 3122 3002 0.00      
2 Ag 1461 1405 0.00      
3 Ag 1164 1119 0.00      
4 Ag 1109 1067 0.00      
5 Ag 622 598 0.00      
6 Ag 358 344 0.00      
7 Au 1329 1278 24.39      
8 Au 1154 1110 419.09      
9 Au 200 193 1.77      
10 Au 80 77 2.30      
11 Bg 1358 1306 0.00      
12 Bg 1116 1073 0.00      
13 Bg 481 462 0.00      
14 Bu 3132 3012 33.68      
15 Bu 1301 1251 20.14      
16 Bu 1138 1095 220.89      
17 Bu 534 514 9.21      
18 Bu 407 391 45.95      

Unscaled Zero Point Vibrational Energy (zpe) 10032.3 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 9647.1 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 PBE1PBE/aug-cc-pVDZ
ABC
0.17009 0.10466 0.06861

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.246 0.720 0.000
C2 0.246 -0.720 0.000
H3 -1.343 0.790 0.000
H4 1.343 -0.790 0.000
F5 0.246 1.346 1.100
F6 0.246 1.346 -1.100
F7 -0.246 -1.346 1.100
F8 -0.246 -1.346 -1.100

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.52211.09932.19181.35731.35732.34062.3406
C21.52212.19181.09932.34062.34061.35731.3573
H31.09932.19183.11582.01082.01082.64072.6407
H42.19181.09933.11582.64072.64072.01082.0108
F51.35732.34062.01082.64072.19902.73673.5107
F61.35732.34062.01082.64072.19903.51072.7367
F72.34061.35732.64072.01082.73673.51072.1990
F82.34061.35732.64072.01083.51072.73672.1990

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 112.463 C1 C2 F7 108.621
C1 C2 F8 108.621 C2 C1 H3 112.463
C2 C1 F5 108.621 C2 C1 F6 108.621
H3 C1 F5 109.419 H3 C1 F6 109.419
H4 C2 F7 109.419 H4 C2 F8 109.419
F5 C1 F6 108.201 F7 C2 F8 108.201
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 1.118      
2 C 1.118      
3 H -0.247      
4 H -0.247      
5 F -0.436      
6 F -0.436      
7 F -0.436      
8 F -0.436      


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 -28.832 -2.973 0.000
y -2.973 -35.284 0.000
z 0.000 0.000 -35.769
Traceless
 xyz
x 6.694 -2.973 0.000
y -2.973 -2.984 0.000
z 0.000 0.000 -3.710
Polar
3z2-r2-7.421
x2-y26.452
xy-2.973
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.274 0.080 0.000
y 0.080 4.610 0.000
z 0.000 0.000 4.714


<r2> (average value of r2) Å2
<r2> 143.526
(<r2>)1/2 11.980