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 CHFClCHClF (ethane, 1,2-dichloro-1,2-difluoro-)

using model chemistry: QCISD/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CI 1AG
Energy calculated at QCISD/3-21G
 hartrees
Energy at 0K-1189.380370
Energy at 298.15K-1189.383508
HF Energy-1188.835870
Nuclear repulsion energy362.500265
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/3-21G
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 3177 3079 0.00      
2 Ag 1436 1392 0.00      
3 Ag 1308 1267 0.00      
4 Ag 1142 1107 0.00      
5 Ag 1064 1031 0.00      
6 Ag 742 719 0.00      
7 Ag 483 468 0.00      
8 Ag 327 316 0.00      
9 Ag 249 241 0.00      
10 Au 3190 3091 3.70      
11 Au 1341 1300 16.91      
12 Au 1249 1211 49.51      
13 Au 1153 1117 148.39      
14 Au 679 658 177.01      
15 Au 349 338 16.05      
16 Au 329 319 26.83      
17 Au 154 150 3.09      
18 Au 67 65 1.27      

Unscaled Zero Point Vibrational Energy (zpe) 9217.6 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 8933.7 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/3-21G
ABC
0.12733 0.04530 0.03449

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/3-21G

Point Group is Ci

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.759
C2 0.000 0.000 0.759
H3 1.005 0.000 -1.176
H4 -1.005 0.000 1.176
F5 -0.775 -1.055 -1.230
F6 0.775 1.055 1.230
Cl7 -0.795 1.642 -1.324
Cl8 0.795 -1.642 1.324

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 Cl7 Cl8
C11.51871.08822.18101.39092.38101.90992.7694
C21.51872.18101.08822.38101.39092.76941.9099
H31.08822.18103.09442.06992.63712.44112.9988
H42.18101.08823.09442.63712.06992.99882.4411
F51.39092.38102.06992.63713.59192.69913.0544
F62.38101.39092.63712.06993.59193.05442.6991
Cl71.90992.76942.44112.99882.69913.05444.5087
Cl82.76941.90992.99882.44113.05442.69914.5087

picture of ethane, 1,2-dichloro-1,2-difluoro- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 112.526 C1 C2 F6 109.759
C1 C2 Cl8 107.198 C2 C1 H3 112.526
C2 C1 F5 109.759 C2 C1 Cl7 107.198
H3 C1 F5 112.647 H3 C1 Cl7 105.730
H4 C2 F6 112.647 H4 C2 Cl8 105.730
F5 C1 Cl7 108.693 F6 C2 Cl8 108.693
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability