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All results from a given calculation for CF3CHF2 (pentafluoroethane)

using model chemistry: QCISD/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 QCISD/3-21G
 hartrees
Energy at 0K-571.187700
Energy at 298.15K-571.190974
HF Energy-570.406280
Nuclear repulsion energy353.404367
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/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' 3152 3055 21.57      
2 A' 1486 1440 11.40      
3 A' 1353 1312 127.81      
4 A' 1255 1216 161.89      
5 A' 1129 1094 63.76      
6 A' 866 839 48.16      
7 A' 692 671 34.11      
8 A' 544 527 23.31      
9 A' 499 484 15.59      
10 A' 350 339 0.14      
11 A' 230 223 6.24      
12 A" 1452 1407 20.14      
13 A" 1311 1270 235.22      
14 A" 1198 1161 52.60      
15 A" 571 554 2.65      
16 A" 400 387 2.61      
17 A" 193 187 4.27      
18 A" 73 71 0.94      

Unscaled Zero Point Vibrational Energy (zpe) 8376.8 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 8118.8 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 QCISD/3-21G
ABC
0.11559 0.07953 0.06519

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.122 -0.595 0.000
C2 -0.616 0.734 0.000
F3 1.477 -0.423 0.000
F4 -0.240 -1.309 1.115
F5 -0.240 -1.309 -1.115
F6 -0.240 1.443 -1.136
F7 -0.240 1.443 1.136
H8 -1.692 0.562 0.000

Atom - Atom Distances (Å)
  C1 C2 F3 F4 F5 F6 F7 H8
C11.51991.36641.37191.37192.36082.36082.1508
C21.51992.39132.35702.35701.39061.39061.0897
F31.36642.39132.23042.23042.77822.77823.3182
F41.37192.35702.23042.22933.55442.75122.6168
F51.37192.35702.23042.22932.75123.55442.6168
F62.36081.39062.77823.55442.75122.27192.0430
F72.36081.39062.77822.75123.55442.27192.0430
H82.15081.08973.31822.61682.61682.04302.0430

picture of pentafluoroethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 F6 108.333 C1 C2 F7 108.333
C1 C2 H8 109.920 C2 C1 F3 111.780
C2 C1 F4 109.084 C2 C1 F5 109.084
F3 C1 F4 109.081 F3 C1 F5 109.081
F4 C1 F5 108.679 F6 C2 F7 109.547
F6 C2 H8 110.329 F7 C2 H8 110.329
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability