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

using model chemistry: B1B95/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1AG
Energy calculated at B1B95/3-21G
 hartrees
Energy at 0K-474.054135
Energy at 298.15K-474.057987
HF Energy-474.054135
Nuclear repulsion energy263.991636
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 B1B95/3-21G
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 3162 3025 0.00      
2 Ag 1496 1431 0.00      
3 Ag 1166 1115 0.00      
4 Ag 1107 1059 0.00      
5 Ag 600 574 0.00      
6 Ag 342 327 0.00      
7 Au 1413 1352 54.94      
8 Au 1214 1161 219.96      
9 Au 175 168 3.41      
10 Au 85 82 2.38      
11 Bg 1429 1368 0.00      
12 Bg 1159 1109 0.00      
13 Bg 470 450 0.00      
14 Bu 3179 3041 50.51      
15 Bu 1357 1298 21.04      
16 Bu 1148 1098 153.81      
17 Bu 511 489 13.08      
18 Bu 378 362 58.75      

Unscaled Zero Point Vibrational Energy (zpe) 10194.7 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 9753.2 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 B1B95/3-21G
ABC
0.16321 0.10612 0.06808

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.250 0.711 0.000
C2 0.250 -0.711 0.000
H3 -1.337 0.739 0.000
H4 1.337 -0.739 0.000
F5 0.250 1.337 1.124
F6 0.250 1.337 -1.124
F7 -0.250 -1.337 1.124
F8 -0.250 -1.337 -1.124

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.50661.08692.14931.38061.38062.33552.3355
C21.50662.14931.08692.33552.33551.38061.3806
H31.08692.14933.05472.03452.03452.59852.5985
H42.14931.08693.05472.59852.59852.03452.0345
F51.38062.33552.03452.59852.24812.71983.5286
F61.38062.33552.03452.59852.24813.52862.7198
F72.33551.38062.59852.03452.71983.52862.2481
F82.33551.38062.59852.03453.52862.71982.2481

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 110.893 C1 C2 F7 107.901
C1 C2 F8 107.901 C2 C1 H3 110.893
C2 C1 F5 107.901 C2 C1 F6 107.901
H3 C1 F5 110.520 H3 C1 F6 110.520
H4 C2 F7 110.520 H4 C2 F8 110.520
F5 C1 F6 109.017 F7 C2 F8 109.017
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.327      
2 C 0.327      
3 H 0.247      
4 H 0.247      
5 F -0.287      
6 F -0.287      
7 F -0.287      
8 F -0.287      


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 -27.831 -2.715 0.000
y -2.715 -34.672 0.000
z 0.000 0.000 -35.088
Traceless
 xyz
x 7.049 -2.715 0.000
y -2.715 -3.212 0.000
z 0.000 0.000 -3.837
Polar
3z2-r2-7.674
x2-y26.841
xy-2.715
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.848 0.033 0.000
y 0.033 2.761 0.000
z 0.000 0.000 3.119


<r2> (average value of r2) Å2
<r2> 143.854
(<r2>)1/2 11.994