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

using model chemistry: B3LYP/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 B3LYP/3-21G*
 hartrees
Energy at 0K-474.166818
Energy at 298.15K-474.170657
HF Energy-474.166818
Nuclear repulsion energy262.451843
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 B3LYP/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 3122 3003 0.00      
2 Ag 1484 1427 0.00      
3 Ag 1142 1099 0.00      
4 Ag 1091 1049 0.00      
5 Ag 594 571 0.00      
6 Ag 344 331 0.00      
7 Au 1404 1351 48.95      
8 Au 1182 1137 222.77      
9 Au 187 179 3.57      
10 Au 85 81 1.96      
11 Bg 1421 1367 0.00      
12 Bg 1128 1085 0.00      
13 Bg 466 448 0.00      
14 Bu 3138 3019 61.19      
15 Bu 1353 1301 21.94      
16 Bu 1123 1080 149.17      
17 Bu 508 488 11.67      
18 Bu 383 368 55.54      

Unscaled Zero Point Vibrational Energy (zpe) 10075.9 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 9693.0 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 B3LYP/3-21G*
ABC
0.16118 0.10490 0.06724

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G*

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.250 0.715 0.000
C2 0.250 -0.715 0.000
H3 -1.340 0.742 0.000
H4 1.340 -0.742 0.000
F5 0.250 1.345 1.131
F6 0.250 1.345 -1.131
F7 -0.250 -1.345 1.131
F8 -0.250 -1.345 -1.131

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.51451.09012.15661.38871.38872.34982.3498
C21.51452.15661.09012.34982.34981.38871.3887
H31.09012.15663.06352.04322.04322.61182.6118
H42.15661.09013.06352.61182.61182.04322.0432
F51.38872.34982.04322.61182.26292.73603.5506
F61.38872.34982.04322.61182.26293.55062.7360
F72.34981.38872.61182.04322.73603.55062.2629
F82.34981.38872.61182.04323.55062.73602.2629

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 110.738 C1 C2 F7 107.998
C1 C2 F8 107.998 C2 C1 H3 110.738
C2 C1 F5 107.998 C2 C1 F6 107.998
H3 C1 F5 110.450 H3 C1 F6 110.450
H4 C2 F7 110.450 H4 C2 F8 110.450
F5 C1 F6 109.130 F7 C2 F8 109.130
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.331      
2 C 0.331      
3 H 0.223      
4 H 0.223      
5 F -0.277      
6 F -0.277      
7 F -0.277      
8 F -0.277      


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 -28.014 -2.590 0.000
y -2.590 -34.604 0.000
z 0.000 0.000 -34.976
Traceless
 xyz
x 6.776 -2.590 0.000
y -2.590 -3.109 0.000
z 0.000 0.000 -3.668
Polar
3z2-r2-7.335
x2-y26.590
xy-2.590
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.888 0.041 0.000
y 0.041 2.812 0.000
z 0.000 0.000 3.184


<r2> (average value of r2) Å2
<r2> 145.352
(<r2>)1/2 12.056