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 CHCl2CHF2 (1,1-dichloro-2,2-difluoroethane)

using model chemistry: MP2/CEP-121G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/CEP-121G*
 hartrees
Energy at 0K-90.139782
Energy at 298.15K-90.143297
HF Energy-89.246186
Nuclear repulsion energy136.330437
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/CEP-121G*
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' 3193 3042 16.22      
2 A' 3175 3025 2.34      
3 A' 1451 1382 36.32      
4 A' 1276 1216 0.30      
5 A' 1153 1098 97.14      
6 A' 1085 1034 57.97      
7 A' 817 778 33.69      
8 A' 567 540 6.80      
9 A' 402 383 19.79      
10 A' 348 331 11.21      
11 A' 253 241 0.24      
12 A" 1389 1324 10.46      
13 A" 1280 1219 21.40      
14 A" 1129 1075 170.17      
15 A" 859 818 124.07      
16 A" 399 380 0.64      
17 A" 181 173 1.44      
18 A" 82 78 0.92      

Unscaled Zero Point Vibrational Energy (zpe) 9518.0 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 9068.8 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/CEP-121G*
ABC
0.08181 0.06966 0.03898

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.418 -0.233 0.000
C2 -0.363 1.093 0.000
H3 1.497 -0.063 0.000
H4 -1.442 0.923 0.000
Cl5 -0.007 -1.144 1.474
Cl6 -0.007 -1.144 -1.474
F7 -0.007 1.826 1.104
F8 -0.007 1.826 -1.104

Atom - Atom Distances (Å)
  C1 C2 H3 H4 Cl5 Cl6 F7 F8
C11.53841.09252.18971.78431.78432.37432.3743
C21.53842.18971.09252.70192.70191.37161.3716
H31.09252.18973.09992.36752.36752.65512.6551
H42.18971.09253.09992.91552.91552.02242.0224
Cl51.78432.70192.36752.91552.94832.99253.9322
Cl61.78432.70192.36752.91552.94833.93222.9925
F72.37431.37162.65512.02242.99253.93222.2071
F82.37431.37162.65512.02243.93222.99252.2071

picture of 1,1-dichloro-2,2-difluoroethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 111.547 C1 C2 F7 109.221
C1 C2 F8 109.221 C2 C1 H3 111.547
C2 C1 Cl5 108.589 C2 C1 Cl6 108.589
H3 C1 Cl5 108.360 H3 C1 Cl6 108.360
H4 C2 F7 109.806 H4 C2 F8 109.806
Cl5 C1 Cl6 111.420 F7 C2 F8 107.135
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability