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All results from a given calculation for C2F2 (difluoroacetylene)

using model chemistry: mPW1PW91/STO-3G

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 mPW1PW91/STO-3G
 hartrees
Energy at 0K-271.888237
Energy at 298.15K-271.886423
Nuclear repulsion energy92.511652
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 mPW1PW91/STO-3G
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 2736 2405 0.00      
2 Σg 811 712 0.00      
3 Σu 1435 1261 69.06      
4 Πg 124 109 0.00      
4 Πg 124 109 0.00      
5 Πu 270 238 0.03      
5 Πu 270 238 0.03      

Unscaled Zero Point Vibrational Energy (zpe) 2885.4 cm-1
Scaled (by 0.8789) Zero Point Vibrational Energy (zpe) 2535.9 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 mPW1PW91/STO-3G
B
0.11217

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/STO-3G

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.601
C2 0.000 0.000 -0.601
F3 0.000 0.000 1.931
F4 0.000 0.000 -1.931

Atom - Atom Distances (Å)
  C1 C2 F3 F4
C11.20261.32922.5318
C21.20262.53181.3292
F31.32922.53183.8610
F42.53181.32923.8610

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 mPW1PW91/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.014      
2 C 0.014      
3 F -0.014      
4 F -0.014      


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 -17.746 0.000 0.000
y 0.000 -17.746 0.000
z 0.000 0.000 -17.025
Traceless
 xyz
x -0.360 0.000 0.000
y 0.000 -0.360 0.000
z 0.000 0.000 0.721
Polar
3z2-r21.441
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 0.317 0.000 0.000
y 0.000 0.317 0.000
z 0.000 0.000 3.550


<r2> (average value of r2) Å2
<r2> 82.356
(<r2>)1/2 9.075