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

using model chemistry: BLYP/TZVP

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/TZVP
 hartrees
Energy at 0K-476.917019
Energy at 298.15K-476.920814
HF Energy-476.917019
Nuclear repulsion energy261.781710
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/TZVP
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 3011 3004 0.00      
2 Ag 1392 1389 0.00      
3 Ag 1075 1073 0.00      
4 Ag 1055 1052 0.00      
5 Ag 590 588 0.00      
6 Ag 343 342 0.00      
7 Au 1309 1306 16.30      
8 Au 1034 1031 430.43      
9 Au 202 202 2.66      
10 Au 74 73 2.21      
11 Bg 1338 1335 0.00      
12 Bg 1001 998 0.00      
13 Bg 455 454 0.00      
14 Bu 3022 3015 41.60      
15 Bu 1281 1278 21.71      
16 Bu 1050 1048 221.52      
17 Bu 513 511 7.47      
18 Bu 401 400 49.44      

Unscaled Zero Point Vibrational Energy (zpe) 9573.2 cm-1
Scaled (by 0.9975) Zero Point Vibrational Energy (zpe) 9549.2 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 BLYP/TZVP
ABC
0.16474 0.10148 0.06643

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/TZVP

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.249 0.730 0.000
C2 0.249 -0.730 0.000
H3 -1.345 0.804 0.000
H4 1.345 -0.804 0.000
F5 0.249 1.368 1.118
F6 0.249 1.368 -1.118
F7 -0.249 -1.368 1.118
F8 -0.249 -1.368 -1.118

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.54221.09842.21171.38021.38022.37712.3771
C21.54222.21171.09842.37712.37711.38021.3802
H31.09842.21173.13332.02692.02692.67712.6771
H42.21171.09843.13332.67712.67712.02692.0269
F51.38022.37712.02692.67712.23612.78073.5683
F61.38022.37712.02692.67712.23613.56832.7807
F72.37711.38022.67712.02692.78073.56832.2361
F82.37711.38022.67712.02693.56832.78072.2361

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 112.685 C1 C2 F7 108.731
C1 C2 F8 108.731 C2 C1 H3 112.685
C2 C1 F5 108.731 C2 C1 F6 108.731
H3 C1 F5 109.194 H3 C1 F6 109.194
H4 C2 F7 109.194 H4 C2 F8 109.194
F5 C1 F6 108.206 F7 C2 F8 108.206
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.220      
2 C 0.220      
3 H 0.122      
4 H 0.122      
5 F -0.171      
6 F -0.171      
7 F -0.171      
8 F -0.171      


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 -29.233 -3.063 0.000
y -3.063 -35.994 0.000
z 0.000 0.000 -36.421
Traceless
 xyz
x 6.975 -3.063 0.000
y -3.063 -3.168 0.000
z 0.000 0.000 -3.807
Polar
3z2-r2-7.615
x2-y26.762
xy-3.063
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.939 0.069 0.000
y 0.069 4.196 0.000
z 0.000 0.000 4.423


<r2> (average value of r2) Å2
<r2> 147.798
(<r2>)1/2 12.157