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All results from a given calculation for C2F2 (difluoroacetylene)

using model chemistry: B3LYPultrafine/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 B3LYPultrafine/6-31G*
 hartrees
Energy at 0K-275.736717
Energy at 298.15K-275.735304
Nuclear repulsion energy94.540440
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 B3LYPultrafine/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σg 2577 2469 0.00      
2 Σg 802 768 0.00      
3 Σu 1382 1324 293.83      
4 Πg 202 194 0.00      
4 Πg 202 194 0.00      
5 Πu 279 268 0.17      
5 Πu 279 268 0.17      

Unscaled Zero Point Vibrational Energy (zpe) 2861.7 cm-1
Scaled (by 0.958) Zero Point Vibrational Energy (zpe) 2741.5 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 B3LYPultrafine/6-31G*
B
0.11701

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/6-31G*

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.596
C2 0.000 0.000 -0.596
F3 0.000 0.000 1.889
F4 0.000 0.000 -1.889

Atom - Atom Distances (Å)
  C1 C2 F3 F4
C11.19251.29242.4850
C21.19252.48501.2924
F31.29242.48503.7774
F42.48501.29243.7774

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 B3LYPultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.185      
2 C 0.185      
3 F -0.185      
4 F -0.185      


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 -19.668 0.000 0.000
y 0.000 -19.668 0.000
z 0.000 0.000 -20.005
Traceless
 xyz
x 0.169 0.000 0.000
y 0.000 0.169 0.000
z 0.000 0.000 -0.337
Polar
3z2-r2-0.675
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 1.453 0.000 0.000
y 0.000 1.453 0.000
z 0.000 0.000 4.621


<r2> (average value of r2) Å2
<r2> 80.830
(<r2>)1/2 8.991