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 CFClCFCl (cis-1,2-dichloro-1,2-difluoroethylene)

using model chemistry: CCSD(T)/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCSD(T)/cc-pVTZ
 hartrees
Energy at 0K-1194.949445
Energy at 298.15K-1194.949993
HF Energy-1193.687706
Nuclear repulsion energy351.713328
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)/cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 1756 1712        
2 A1 1197 1167        
3 A1 569 555        
4 A1 331 323        
5 A1 168 164        
6 A2 537 523        
7 A2 147 143        
8 B1 342 334        
9 B2 1241 1210        
10 B2 971 947        
11 B2 432 421        
12 B2 417 406        

Unscaled Zero Point Vibrational Energy (zpe) 4054.0 cm-1
Scaled (by 0.9748) Zero Point Vibrational Energy (zpe) 3951.8 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)/cc-pVTZ
ABC
0.10247 0.06255 0.03884

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.669 0.417
C2 0.000 -0.669 0.417
F3 0.000 1.333 1.569
F4 0.000 -1.333 1.569
Cl5 0.000 1.654 -0.978
Cl6 0.000 -1.654 -0.978

Atom - Atom Distances (Å)
  C1 C2 F3 F4 Cl5 Cl6
C11.33821.32902.30971.70752.7094
C21.33822.30971.32902.70941.7075
F31.32902.30972.66652.56643.9249
F42.30971.32902.66653.92492.5664
Cl51.70752.70942.56643.92493.3071
Cl62.70941.70753.92492.56643.3071

picture of cis-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 119.984 C1 C2 Cl6 125.208
C2 C1 F3 119.984 C2 C1 Cl5 125.208
F3 C1 Cl5 114.808 F4 C2 Cl6 114.808
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability