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All results from a given calculation for C2F2 (difluoroacetylene)

using model chemistry: HF/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D*H 1Σg
Energy calculated at HF/Def2TZVPP
 hartrees
Energy at 0K-274.584479
Energy at 298.15K-274.583893
HF Energy-274.584479
Nuclear repulsion energy96.785244
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 HF/Def2TZVPP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Σg 2766 2507 0.00      
2 Σg 868 787 0.00      
3 Σu 1485 1346 377.48      
4 Πg 511 463 0.00      
4 Πg 511 463 0.00      
5 Πu 329 298 0.23      
5 Πu 329 298 0.23      

Unscaled Zero Point Vibrational Energy (zpe) 3399.4 cm-1
Scaled (by 0.9064) Zero Point Vibrational Energy (zpe) 3081.2 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 HF/Def2TZVPP
B
0.12267

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/Def2TZVPP

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.577
C2 0.000 0.000 -0.577
F3 0.000 0.000 1.844
F4 0.000 0.000 -1.844

Atom - Atom Distances (Å)
  C1 C2 F3 F4
C11.15461.26682.4214
C21.15462.42141.2668
F31.26682.42143.6882
F42.42141.26683.6882

picture of difluoroacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 F4 180.000 C2 C1 F3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.216      
2 C 0.216      
3 F -0.216      
4 F -0.216      


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 -20.151 0.000 0.000
y 0.000 -20.151 0.000
z 0.000 0.000 -21.363
Traceless
 xyz
x 0.606 0.000 0.000
y 0.000 0.606 0.000
z 0.000 0.000 -1.212
Polar
3z2-r2-2.423
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.125 0.000 0.000
y 0.000 2.125 0.000
z 0.000 0.000 4.414


<r2> (average value of r2) Å2
<r2> 78.154
(<r2>)1/2 8.840