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 CF2ClCF2Cl (1,2-Dichloro-1,1,2,2-tetrafluoroethane)

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-1393.669558
Energy at 298.15K-1393.671783
HF Energy-1392.429011
Nuclear repulsion energy612.696202
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
4/u)
Dep P Dep U
1 Ag 1362 1282 0.00      
2 Ag 1137 1070 0.00      
3 Ag 714 672 0.00      
4 Ag 456 429 0.00      
5 Ag 362 341 0.00      
6 Ag 264 248 0.00      
7 Au 1274 1199 354.56      
8 Au 385 362 0.93      
9 Au 225 211 1.85      
10 Au 73 68 0.26      
11 Bg 1266 1192 0.00      
12 Bg 557 525 0.00      
13 Bg 333 313 0.00      
14 Bu 1196 1126 361.42      
15 Bu 887 835 342.75      
16 Bu 605 569 15.43      
17 Bu 445 419 3.09      
18 Bu 175 165 1.54      

Unscaled Zero Point Vibrational Energy (zpe) 5855.8 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 5512.6 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
0.07360 0.03876 0.03494

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 -0.243 0.732 0.000
C2 0.243 -0.732 0.000
Cl3 -1.999 0.813 0.000
Cl4 1.999 -0.813 0.000
F5 0.243 1.348 1.093
F6 0.243 1.348 -1.093
F7 -0.243 -1.348 1.093
F8 -0.243 -1.348 -1.093

Atom - Atom Distances (Å)
  C1 C2 Cl3 Cl4 F5 F6 F7 F8
C11.54171.75752.72231.34551.34552.34942.3494
C21.54172.72231.75752.34942.34941.34551.3455
Cl31.75752.72234.31542.55032.55032.99152.9915
Cl42.72231.75754.31542.99152.99152.55032.5503
F51.34552.34942.55032.99152.18552.73993.5048
F61.34552.34942.55032.99152.18553.50482.7399
F72.34941.34552.99152.55032.73993.50482.1855
F82.34941.34552.99152.55033.50482.73992.1855

picture of 1,2-Dichloro-1,1,2,2-tetrafluoroethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Cl4 111.036 C1 C2 F7 108.735
C1 C2 F8 108.735 C2 C1 Cl3 111.036
C2 C1 F5 108.735 C2 C1 F6 108.735
Cl3 C1 F5 109.837 Cl3 C1 F6 109.837
Cl4 C2 F7 109.837 Cl4 C2 F8 109.837
F5 C1 F6 108.612 F7 C2 F8 108.612
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability