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

using model chemistry: B1B95/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1AG
Energy calculated at B1B95/6-31+G**
 hartrees
Energy at 0K-476.681984
Energy at 298.15K-476.685916
HF Energy-476.681984
Nuclear repulsion energy266.464098
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 B1B95/6-31+G**
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 3143 3007 0.00      
2 Ag 1477 1413 0.00      
3 Ag 1168 1118 0.00      
4 Ag 1119 1071 0.00      
5 Ag 625 598 0.00      
6 Ag 354 338 0.00      
7 Au 1355 1296 42.11      
8 Au 1174 1123 435.87      
9 Au 192 184 2.16      
10 Au 78 74 2.75      
11 Bg 1385 1325 0.00      
12 Bg 1137 1088 0.00      
13 Bg 482 461 0.00      
14 Bu 3154 3017 33.92      
15 Bu 1321 1263 27.00      
16 Bu 1153 1103 240.21      
17 Bu 536 513 11.12      
18 Bu 407 390 51.42      

Unscaled Zero Point Vibrational Energy (zpe) 10129.4 cm-1
Scaled (by 0.9566) Zero Point Vibrational Energy (zpe) 9689.8 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 B1B95/6-31+G**
ABC
0.17071 0.10525 0.06895

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31+G**

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 -1.336 0.790 0.000
H4 1.336 -0.790 0.000
F5 0.246 1.342 1.098
F6 0.246 1.342 -1.098
F7 -0.246 -1.342 1.098
F8 -0.246 -1.342 -1.098

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.52141.09172.18641.35421.35422.33552.3355
C21.52142.18641.09172.33552.33551.35421.3542
H31.09172.18643.10312.00272.00272.63352.6335
H42.18641.09173.10312.63352.63352.00272.0027
F51.35422.33552.00272.63352.19512.72833.5018
F61.35422.33552.00272.63352.19513.50182.7283
F72.33551.35422.63352.00272.72833.50182.1951
F82.33551.35422.63352.00273.50182.72832.1951

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 112.548 C1 C2 F7 108.486
C1 C2 F8 108.486 C2 C1 H3 112.548
C2 C1 F5 108.486 C2 C1 F6 108.486
H3 C1 F5 109.466 H3 C1 F6 109.466
H4 C2 F7 109.466 H4 C2 F8 109.466
F5 C1 F6 108.292 F7 C2 F8 108.292
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.419      
2 C 0.419      
3 H 0.170      
4 H 0.170      
5 F -0.294      
6 F -0.294      
7 F -0.294      
8 F -0.294      


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 -28.680 -3.149 0.000
y -3.149 -35.445 0.000
z 0.000 0.000 -35.964
Traceless
 xyz
x 7.025 -3.149 0.000
y -3.149 -3.123 0.000
z 0.000 0.000 -3.902
Polar
3z2-r2-7.803
x2-y26.765
xy-3.149
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.951 0.082 0.000
y 0.082 4.162 0.000
z 0.000 0.000 4.340


<r2> (average value of r2) Å2
<r2> 142.958
(<r2>)1/2 11.956