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/6-31G(2df,p)

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/6-31G(2df,p)
 hartrees
Energy at 0K-1194.666192
Energy at 298.15K-1194.666809
HF Energy-1193.533846
Nuclear repulsion energy353.051695
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/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 A1 1821 1722 16.93      
2 A1 1236 1169 273.74      
3 A1 581 550 0.56      
4 A1 334 315 2.58      
5 A1 170 161 1.23      
6 A2 568 537 0.00      
7 A2 152 144 0.00      
8 B1 360 340 1.18      
9 B2 1278 1208 28.50      
10 B2 991 937 154.99      
11 B2 440 416 0.28      
12 B2 423 400 0.70      

Unscaled Zero Point Vibrational Energy (zpe) 4176.5 cm-1
Scaled (by 0.9455) Zero Point Vibrational Energy (zpe) 3948.9 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 CCSD/6-31G(2df,p)
ABC
0.10331 0.06297 0.03912

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.665 0.419
C2 0.000 -0.665 0.419
F3 0.000 1.328 1.561
F4 0.000 -1.328 1.561
Cl5 0.000 1.649 -0.974
Cl6 0.000 -1.649 -0.974

Atom - Atom Distances (Å)
  C1 C2 F3 F4 Cl5 Cl6
C11.33081.31972.29691.70582.7014
C21.33082.29691.31972.70141.7058
F31.31972.29692.65582.55543.9099
F42.29691.31972.65583.90992.5554
Cl51.70582.70142.55543.90993.2973
Cl62.70141.70583.90992.55543.2973

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 120.134 C1 C2 Cl6 125.200
C2 C1 F3 120.134 C2 C1 Cl5 125.200
F3 C1 Cl5 114.666 F4 C2 Cl6 114.666
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability