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All results from a given calculation for C2F2 (difluoroacetylene)

using model chemistry: B1B95/6-31G(2df,p)

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 B1B95/6-31G(2df,p)
 hartrees
Energy at 0K-275.699334
Energy at 298.15K-275.698314
Nuclear repulsion energy95.607106
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 B1B95/6-31G(2df,p)
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 2610 2499 0.00      
2 Σg 821 787 0.00      
3 Σu 1421 1361 310.72      
4 Πg 323 309 0.00      
4 Πg 323 309 0.00      
5 Πu 302 289 0.06      
5 Πu 302 289 0.06      

Unscaled Zero Point Vibrational Energy (zpe) 3050.9 cm-1
Scaled (by 0.9577) Zero Point Vibrational Energy (zpe) 2921.9 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 B1B95/6-31G(2df,p)
B
0.11961

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G(2df,p)

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.592
C2 0.000 0.000 -0.592
F3 0.000 0.000 1.868
F4 0.000 0.000 -1.868

Atom - Atom Distances (Å)
  C1 C2 F3 F4
C11.18441.27542.4597
C21.18442.45971.2754
F31.27542.45973.7351
F42.45971.27543.7351

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 B1B95/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.008      
2 C 0.008      
3 F -0.008      
4 F -0.008      


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 -19.610 0.000 0.000
y 0.000 -19.610 0.000
z 0.000 0.000 -19.703
Traceless
 xyz
x 0.047 0.000 0.000
y 0.000 0.047 0.000
z 0.000 0.000 -0.094
Polar
3z2-r2-0.187
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 1.886 0.000 0.000
y 0.000 1.886 0.000
z 0.000 0.000 4.689


<r2> (average value of r2) Å2
<r2> 79.254
(<r2>)1/2 8.902