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 CF3CHF2 (pentafluoroethane)

using model chemistry: QCISD/TZVP

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/TZVP
 hartrees
Energy at 0K-575.045174
Energy at 298.15K-575.048663
HF Energy-573.740697
Nuclear repulsion energy359.797685
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/TZVP
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' 3158 3016 17.89      
2 A' 1490 1423 0.54      
3 A' 1353 1293 177.01      
4 A' 1246 1190 185.48      
5 A' 1173 1120 157.57      
6 A' 887 847 49.17      
7 A' 742 709 37.29      
8 A' 593 567 15.89      
9 A' 536 512 9.75      
10 A' 368 351 0.08      
11 A' 250 239 4.63      
12 A" 1430 1366 12.06      
13 A" 1270 1213 368.66      
14 A" 1193 1140 128.11      
15 A" 598 571 1.00      
16 A" 424 405 1.22      
17 A" 215 205 3.09      
18 A" 73 70 1.01      

Unscaled Zero Point Vibrational Energy (zpe) 8498.8 cm-1
Scaled (by 0.9553) Zero Point Vibrational Energy (zpe) 8118.9 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/TZVP
ABC
0.12294 0.08035 0.06662

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.121 -0.605 0.000
C2 -0.601 0.753 0.000
F3 1.441 -0.457 0.000
F4 -0.234 -1.299 1.083
F5 -0.234 -1.299 -1.083
F6 -0.234 1.444 -1.096
F7 -0.234 1.444 1.096
H8 -1.682 0.611 0.000

Atom - Atom Distances (Å)
  C1 C2 F3 F4 F5 F6 F7 H8
C11.53771.32801.33421.33422.35042.35042.1754
C21.53772.37362.34882.34881.34701.34701.0903
F31.32802.37362.16462.16462.76032.76033.3011
F41.33422.34882.16462.16533.50292.74302.6307
F51.33422.34882.16462.16532.74303.50292.6307
F62.35041.34702.76033.50292.74302.19211.9983
F72.35041.34702.76032.74303.50292.19211.9983
H82.17541.09033.30112.63072.63071.99831.9983

picture of pentafluoroethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 F6 108.952 C1 C2 F7 108.952
C1 C2 H8 110.581 C2 C1 F3 111.637
C2 C1 F4 109.533 C2 C1 F5 109.533
F3 C1 F4 108.801 F3 C1 F5 108.801
F4 C1 F5 108.475 F6 C2 F7 108.921
F6 C2 H8 109.702 F7 C2 H8 109.702
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability