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

using model chemistry: BLYP/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 BLYP/6-31G*
 hartrees
Energy at 0K-476.690971
Energy at 298.15K-476.694766
HF Energy-476.690971
Nuclear repulsion energy262.467753
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 BLYP/6-31G*
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 3005 2981 0.00      
2 Ag 1424 1412 0.00      
3 Ag 1103 1095 0.00      
4 Ag 1079 1070 0.00      
5 Ag 594 589 0.00      
6 Ag 342 339 0.00      
7 Au 1343 1332 45.67      
8 Au 1099 1090 342.70      
9 Au 192 191 1.89      
10 Au 79 79 1.57      
11 Bg 1369 1358 0.00      
12 Bg 1065 1057 0.00      
13 Bg 462 459 0.00      
14 Bu 3016 2992 76.87      
15 Bu 1293 1282 31.27      
16 Bu 1087 1078 193.24      
17 Bu 510 506 6.77      
18 Bu 399 396 39.72      

Unscaled Zero Point Vibrational Energy (zpe) 9731.2 cm-1
Scaled (by 0.9919) Zero Point Vibrational Energy (zpe) 9652.4 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 BLYP/6-31G*
ABC
0.16417 0.10291 0.06693

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.240 0.734 0.000
C2 0.240 -0.734 0.000
H3 -1.344 0.778 0.000
H4 1.344 -0.778 0.000
F5 0.240 1.362 1.120
F6 0.240 1.362 -1.120
F7 -0.240 -1.362 1.120
F8 -0.240 -1.362 -1.120

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.54351.10502.18891.37031.37032.37582.3758
C21.54352.18891.10502.37582.37581.37031.3703
H31.10502.18893.10522.02512.02512.65542.6554
H42.18891.10503.10522.65542.65542.02512.0251
F51.37032.37582.02512.65542.23942.76533.5584
F61.37032.37582.02512.65542.23943.55842.7653
F72.37581.37032.65542.02512.76533.55842.2394
F82.37581.37032.65542.02513.55842.76532.2394

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 110.379 C1 C2 F7 109.103
C1 C2 F8 109.103 C2 C1 H3 110.379
C2 C1 F5 109.103 C2 C1 F6 109.103
H3 C1 F5 109.323 H3 C1 F6 109.323
H4 C2 F7 109.323 H4 C2 F8 109.323
F5 C1 F6 109.596 F7 C2 F8 109.596
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.364      
2 C 0.364      
3 H 0.130      
4 H 0.130      
5 F -0.247      
6 F -0.247      
7 F -0.247      
8 F -0.247      


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 -28.400 -2.223 0.000
y -2.223 -33.722 0.000
z 0.000 0.000 -33.935
Traceless
 xyz
x 5.429 -2.223 0.000
y -2.223 -2.555 0.000
z 0.000 0.000 -2.874
Polar
3z2-r2-5.748
x2-y25.323
xy-2.223
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.604 -0.017 0.000
y -0.017 3.687 0.000
z 0.000 0.000 3.798


<r2> (average value of r2) Å2
<r2> 145.704
(<r2>)1/2 12.071