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All results from a given calculation for C2H2F2 (Ethene, 1,2-difluoro-, (E)-)

using model chemistry: QCISD/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at QCISD/6-31G*
 hartrees
Energy at 0K-276.333977
Energy at 298.15K-276.336233
HF Energy-275.719397
Nuclear repulsion energy110.366821
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 QCISD/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 3280 3123 0.00      
2 Ag 1795 1709 0.00      
3 Ag 1323 1260 0.00      
4 Ag 1173 1117 0.00      
5 Ag 556 529 0.00      
6 Au 916 872 56.86      
7 Au 342 325 7.43      
8 Bg 789 751 0.00      
9 Bu 3270 3114 10.45      
10 Bu 1329 1266 27.68      
11 Bu 1200 1143 241.11      
12 Bu 315 300 14.27      

Unscaled Zero Point Vibrational Energy (zpe) 8143.5 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 7755.0 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 QCISD/6-31G*
ABC
1.88616 0.13269 0.12397

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.337 0.573 0.000
C2 0.337 -0.573 0.000
F3 0.337 1.748 0.000
F4 -0.337 -1.748 0.000
H5 -1.417 0.671 0.000
H6 1.417 -0.671 0.000

Atom - Atom Distances (Å)
  C1 C2 F3 F4 H5 H6
C11.32961.35502.32091.08442.1509
C21.32962.32091.35502.15091.0844
F31.35502.32093.56052.05872.6493
F42.32091.35503.56052.64932.0587
H51.08442.15092.05872.64933.1364
H62.15091.08442.64932.05873.1364

picture of Ethene, 1,2-difluoro-, (E)- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 F4 119.645 C1 C2 H6 125.693
C2 C1 F3 119.645 C2 C1 H5 125.693
F3 C1 H5 114.662 F4 C2 H6 114.662
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability