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: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-1189.733772
Energy at 298.15K-1189.737154
HF Energy-1189.050180
Nuclear repulsion energy372.834190
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 MP2/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3190 3035 1.56      
2 A 1444 1374 0.34      
3 A 1359 1293 26.26      
4 A 1119 1064 96.17      
5 A 1060 1009 41.73      
6 A 820 780 80.10      
7 A 439 418 2.93      
8 A 293 279 1.29      
9 A 164 156 1.40      
10 A 80 76 0.77      
11 B 3205 3049 7.14      
12 B 1387 1320 5.32      
13 B 1309 1245 21.61      
14 B 1090 1037 8.43      
15 B 792 754 108.10      
16 B 408 388 7.50      
17 B 370 352 19.71      
18 B 344 328 13.29      

Unscaled Zero Point Vibrational Energy (zpe) 9436.2 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 8976.7 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 MP2/3-21G*
ABC
0.09422 0.06021 0.03810

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.246 0.725 0.405
C2 0.246 -0.725 0.405
H3 -1.333 0.767 0.382
H4 1.333 -0.767 0.382
F5 0.246 1.313 1.587
F6 -0.246 -1.313 1.587
Cl7 0.398 1.614 -1.006
Cl8 -0.398 -1.614 -1.006

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 Cl7 Cl8
C11.53161.08772.17281.40882.35581.78802.7364
C21.53162.17281.08772.35581.40882.73641.7880
H31.08772.17283.07582.05992.63792.37492.9108
H42.17281.08773.07582.63792.05992.91082.3749
F51.40882.35582.05992.63792.67122.61503.9632
F62.35581.40882.63792.05992.67123.96322.6150
Cl71.78802.73642.37492.91082.61503.96323.3254
Cl82.73641.78802.91082.37493.96322.61503.3254

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 110.964 C1 C2 F6 106.410
C1 C2 Cl8 110.800 C2 C1 H3 110.964
C2 C1 F5 106.410 C2 C1 Cl7 110.800
H3 C1 F5 110.540 H3 C1 Cl7 108.904
H4 C2 F6 110.540 H4 C2 Cl8 108.904
F5 C1 Cl7 109.197 F6 C2 Cl8 109.197
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability