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 CHFClCHFCl (1,2-dichloro-1,2-difluoroethane RR)

using model chemistry: CCSD(T)=FULL/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at CCSD(T)=FULL/aug-cc-pVDZ
 hartrees
Energy at 0K-1195.888445
Energy at 298.15K-1195.891899
HF Energy-1194.805904
Nuclear repulsion energy374.442199
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)=FULL/aug-cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3136 3046        
2 A 1387 1347        
3 A 1276 1239        
4 A 1139 1106        
5 A 1054 1024        
6 A 830 806        
7 A 455 442        
8 A 309 300        
9 A 164 160        
10 A 77 75        
11 B 3146 3055        
12 B 1322 1283        
13 B 1217 1182        
14 B 1059 1028        
15 B 821 798        
16 B 430 418        
17 B 385 374        
18 B 330 320        

Unscaled Zero Point Vibrational Energy (zpe) 9268.1 cm-1
Scaled (by 0.9712) Zero Point Vibrational Energy (zpe) 9001.1 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)=FULL/aug-cc-pVDZ
ABC
0.09660 0.05960 0.03839

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.226 0.732 0.395
C2 0.226 -0.732 0.395
H3 -1.320 0.825 0.344
H4 1.320 -0.825 0.344
F5 0.226 1.311 1.565
F6 -0.226 -1.311 1.565
Cl7 0.493 1.603 -0.988
Cl8 -0.493 -1.603 -0.988

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 Cl7 Cl8
C11.53231.09982.19491.38142.35461.78542.7271
C21.53232.19491.09982.35461.38142.72711.7854
H31.09982.19493.11392.02872.69302.38082.8907
H42.19491.09983.11392.69302.02872.89072.3808
F51.38142.35462.02872.69302.66032.58423.9405
F62.35461.38142.69302.02872.66033.94052.5842
Cl71.78542.72712.38082.89072.58423.94053.3538
Cl82.72711.78542.89072.38083.94052.58423.3538

picture of 1,2-dichloro-1,2-difluoroethane RR state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 111.956 C1 C2 F6 107.712
C1 C2 Cl8 110.337 C2 C1 H3 111.956
C2 C1 F5 107.712 C2 C1 Cl7 110.337
H3 C1 F5 109.176 H3 C1 Cl7 108.886
H4 C2 F6 109.176 H4 C2 Cl8 108.886
F5 C1 Cl7 108.711 F6 C2 Cl8 108.711
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability