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All results from a given calculation for CF3CHF2 (pentafluoroethane)

using model chemistry: CISD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CISD/3-21G*
 hartrees
Energy at 0K-571.077994
Energy at 298.15K-571.081406
HF Energy-570.409535
Nuclear repulsion energy356.565383
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 CISD/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' 3283 3067 17.57      
2 A' 1545 1444 9.90      
3 A' 1417 1324 149.62      
4 A' 1309 1223 181.20      
5 A' 1181 1103 77.71      
6 A' 904 844 53.19      
7 A' 723 675 40.08      
8 A' 566 529 25.95      
9 A' 518 484 17.95      
10 A' 363 339 0.19      
11 A' 240 224 6.95      
12 A" 1502 1403 24.28      
13 A" 1367 1277 270.25      
14 A" 1253 1171 59.73      
15 A" 594 555 3.10      
16 A" 416 389 3.05      
17 A" 201 188 4.75      
18 A" 76 71 1.14      

Unscaled Zero Point Vibrational Energy (zpe) 8728.0 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 8155.4 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 CISD/3-21G*
ABC
0.11792 0.08079 0.06629

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.121 -0.590 0.000
C2 -0.610 0.730 0.000
F3 1.463 -0.423 0.000
F4 -0.238 -1.298 1.104
F5 -0.238 -1.298 -1.104
F6 -0.238 1.432 -1.124
F7 -0.238 1.432 1.124
H8 -1.677 0.561 0.000

Atom - Atom Distances (Å)
  C1 C2 F3 F4 F5 F6 F7 H8
C11.50901.35341.35901.35902.34152.34152.1346
C21.50902.37282.33852.33851.37711.37711.0796
F31.35342.37282.20852.20852.75672.75673.2909
F41.35902.33852.20852.20703.52372.73022.5972
F51.35902.33852.20852.20702.73023.52372.5972
F62.34151.37712.75673.52372.73022.24852.0233
F72.34151.37712.75672.73023.52372.24852.0233
H82.13461.07963.29092.59722.59722.02332.0233

picture of pentafluoroethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 F6 108.365 C1 C2 F7 108.365
C1 C2 H8 109.993 C2 C1 F3 111.871
C2 C1 F4 109.140 C2 C1 F5 109.140
F3 C1 F4 109.022 F3 C1 F5 109.022
F4 C1 F5 108.588 F6 C2 F7 109.454
F6 C2 H8 110.308 F7 C2 H8 110.308
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability