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: QCISD(T)/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at QCISD(T)/6-31G*
 hartrees
Energy at 0K-1195.643113
Energy at 298.15K-1195.646626
HF Energy-1194.716113
Nuclear repulsion energy376.201240
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(T)/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 A 3145 3017        
2 A 1432 1374        
3 A 1343 1288        
4 A 1160 1113        
5 A 1107 1062        
6 A 861 826        
7 A 464 445        
8 A 316 304        
9 A 166 159        
10 A 85 81        
11 B 3156 3027        
12 B 1375 1319        
13 B 1272 1220        
14 B 1115 1070        
15 B 849 814        
16 B 436 418        
17 B 391 375        
18 B 342 328        

Unscaled Zero Point Vibrational Energy (zpe) 9507.4 cm-1
Scaled (by 0.9593) Zero Point Vibrational Energy (zpe) 9120.5 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(T)/6-31G*
ABC
0.09766 0.06004 0.03860

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-31G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.232 0.726 0.392
C2 0.232 -0.726 0.392
H3 -1.324 0.794 0.366
H4 1.324 -0.794 0.366
F5 0.232 1.282 1.560
F6 -0.232 -1.282 1.560
Cl7 0.434 1.623 -0.985
Cl8 -0.434 -1.623 -0.985

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 Cl7 Cl8
C11.52551.09432.17601.37422.32351.77362.7312
C21.52552.17601.09432.32351.37422.73121.7736
H31.09432.17603.08792.02112.63182.36812.9091
H42.17601.09433.08792.63182.02112.90912.3681
F51.37422.32352.02112.63182.60622.57573.9197
F62.32351.37422.63182.02112.60623.91972.5757
Cl71.77362.73122.36812.90912.57573.91973.3610
Cl82.73121.77362.90912.36813.91972.57573.3610

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 111.261 C1 C2 F6 106.391
C1 C2 Cl8 111.542 C2 C1 H3 111.261
C2 C1 F5 106.391 C2 C1 Cl7 111.542
H3 C1 F5 109.397 H3 C1 Cl7 109.022
H4 C2 F6 109.397 H4 C2 Cl8 109.022
F5 C1 Cl7 109.167 F6 C2 Cl8 109.167
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability