return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CFClCClF (trans-1,2-dichloro-1,2-difluoroethylene)

using model chemistry: CCSD(T)/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 CCSD(T)/6-31G**
 hartrees
Energy at 0K-1194.421386
Energy at 298.15K-1194.421885
HF Energy-1193.504398
Nuclear repulsion energy348.468876
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 CCSD(T)/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 Ag 1780 1688        
2 Ag 1241 1177        
3 Ag 640 607        
4 Ag 429 407        
5 Ag 292 277        
6 Au 360 341        
7 Au 134 127        
8 Bg 500 475        
9 Bu 1255 1191        
10 Bu 903 857        
11 Bu 428 406        
12 Bu 178 168        

Unscaled Zero Point Vibrational Energy (zpe) 4069.6 cm-1
Scaled (by 0.9485) Zero Point Vibrational Energy (zpe) 3860.1 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 CCSD(T)/6-31G**
ABC
0.14091 0.04989 0.03684

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.058 0.668 0.000
C2 0.058 -0.668 0.000
F3 -1.268 1.247 0.000
F4 1.268 -1.247 0.000
Cl5 1.268 1.750 0.000
Cl6 -1.268 -1.750 0.000

Atom - Atom Distances (Å)
  C1 C2 F3 F4 Cl5 Cl6
C11.34031.34142.32921.71152.7033
C21.34032.32921.34142.70331.7115
F31.34142.32923.55712.58472.9974
F42.32921.34143.55712.99742.5847
Cl51.71152.70332.58472.99744.3217
Cl62.70331.71152.99742.58474.3217

picture of trans-1,2-dichloro-1,2-difluoroethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 F4 120.581 C1 C2 Cl6 124.255
C2 C1 F3 120.581 C2 C1 Cl5 124.255
F3 C1 Cl5 115.163 F4 C2 Cl6 115.163
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability