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All results from a given calculation for C2F2 (difluoroacetylene)

using model chemistry: PBEPBEultrafine/6-31G*

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 PBEPBEultrafine/6-31G*
 hartrees
Energy at 0K-275.463235
Energy at 298.15K-275.461792
Nuclear repulsion energy93.956828
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 PBEPBEultrafine/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Ag 2480 2439 0.00      
2 Ag 789 776 0.00      
3 Ag 126 124 0.00      
4 Au 269 265 0.01      
5 Bu 1362 1340 281.80      
6 Bu 271 267 1.18      

Unscaled Zero Point Vibrational Energy (zpe) 2648.7 cm-1
Scaled (by 0.9835) Zero Point Vibrational Energy (zpe) 2604.9 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 PBEPBEultrafine/6-31G*
ABC
228.87953 0.11582 0.11576

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.043 0.603 0.000
C2 0.043 -0.603 0.000
F3 0.043 1.897 0.000
F4 -0.043 -1.897 0.000

Atom - Atom Distances (Å)
  C1 C2 F3 F4
C11.20821.29782.5000
C21.20822.50001.2978
F31.29782.50003.7959
F42.50001.29783.7959

picture of difluoroacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 F4 172.051 C2 C1 F3 172.051
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.157      
2 C 0.157      
3 F -0.157      
4 F -0.157      


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 -19.781 0.007 0.000
y 0.007 -19.286 0.000
z 0.000 0.000 -19.781
Traceless
 xyz
x -0.247 0.007 0.000
y 0.007 0.495 0.000
z 0.000 0.000 -0.248
Polar
3z2-r2-0.496
x2-y2-0.495
xy0.007
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.515 -0.183 0.000
y -0.183 4.841 0.000
z 0.000 0.000 1.496


<r2> (average value of r2) Å2
<r2> 81.470
(<r2>)1/2 9.026