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

using model chemistry: PBEPBE/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1AG
Energy calculated at PBEPBE/cc-pVDZ
 hartrees
Energy at 0K-476.323803
Energy at 298.15K-476.327602
HF Energy-476.323803
Nuclear repulsion energy263.533814
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 PBEPBE/cc-pVDZ
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 2985 2967 0.00      
2 Ag 1394 1385 0.00      
3 Ag 1109 1103 0.00      
4 Ag 1070 1064 0.00      
5 Ag 600 597 0.00      
6 Ag 346 344 0.00      
7 Au 1286 1278 50.18      
8 Au 1110 1103 367.61      
9 Au 189 188 2.10      
10 Au 70 69 1.60      
11 Bg 1313 1306 0.00      
12 Bg 1072 1066 0.00      
13 Bg 460 457 0.00      
14 Bu 2995 2978 66.64      
15 Bu 1251 1244 26.21      
16 Bu 1097 1090 209.97      
17 Bu 520 517 6.97      
18 Bu 385 383 39.64      

Unscaled Zero Point Vibrational Energy (zpe) 9625.3 cm-1
Scaled (by 0.9942) Zero Point Vibrational Energy (zpe) 9569.5 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 PBEPBE/cc-pVDZ
ABC
0.16655 0.10321 0.06746

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/cc-pVDZ

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.246 0.725 0.000
C2 0.246 -0.725 0.000
H3 -1.357 0.783 0.000
H4 1.357 -0.783 0.000
F5 0.246 1.356 1.112
F6 0.246 1.356 -1.112
F7 -0.246 -1.356 1.112
F8 -0.246 -1.356 -1.112

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.53141.11282.20121.36951.36952.35932.3593
C21.53142.20121.11282.35932.35931.36951.3695
H31.11282.20123.13412.03332.03332.65442.6544
H42.20121.11283.13412.65442.65442.03332.0333
F51.36952.35932.03332.65442.22322.75603.5409
F61.36952.35932.03332.65442.22323.54092.7560
F72.35931.36952.65442.03332.75603.54092.2232
F82.35931.36952.65442.03333.54092.75602.2232

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 111.729 C1 C2 F7 108.709
C1 C2 F8 108.709 C2 C1 H3 111.729
C2 C1 F5 108.709 C2 C1 F6 108.709
H3 C1 F5 109.557 H3 C1 F6 109.557
H4 C2 F7 109.557 H4 C2 F8 109.557
F5 C1 F6 108.518 F7 C2 F8 108.518
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.294      
2 C 0.294      
3 H 0.035      
4 H 0.035      
5 F -0.165      
6 F -0.165      
7 F -0.165      
8 F -0.165      


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 -28.529 -2.240 0.000
y -2.240 -34.136 0.000
z 0.000 0.000 -34.197
Traceless
 xyz
x 5.638 -2.240 0.000
y -2.240 -2.773 0.000
z 0.000 0.000 -2.865
Polar
3z2-r2-5.730
x2-y25.607
xy-2.240
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.601 -0.051 0.000
y -0.051 3.603 0.000
z 0.000 0.000 3.706


<r2> (average value of r2) Å2
<r2> 144.955
(<r2>)1/2 12.040