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All results from a given calculation for C2H5F (fluoroethane)

using model chemistry: CISD/6-31G(2df,p)

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/6-31G(2df,p)
 hartrees
Energy at 0K-178.616687
Energy at 298.15K-178.622336
Nuclear repulsion energy79.850540
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/6-31G(2df,p)
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' 3243 3243 20.42      
2 A' 3160 3160 8.68      
3 A' 3156 3156 37.79      
4 A' 1599 1599 0.71      
5 A' 1567 1567 1.35      
6 A' 1508 1508 31.11      
7 A' 1466 1466 1.12      
8 A' 1198 1198 66.03      
9 A' 1141 1141 33.24      
10 A' 940 940 8.99      
11 A' 420 420 5.44      
12 A" 3252 3252 29.19      
13 A" 3203 3203 27.11      
14 A" 1548 1548 3.92      
15 A" 1364 1364 0.38      
16 A" 1252 1252 5.31      
17 A" 837 837 0.40      
18 A" 267 267 0.63      

Unscaled Zero Point Vibrational Energy (zpe) 15559.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 15559.8 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 CISD/6-31G(2df,p)
ABC
1.22715 0.31838 0.27904

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.554 0.000
C2 1.109 -0.470 0.000
F3 -1.213 -0.079 0.000
H4 0.051 1.189 0.882
H5 0.051 1.189 -0.882
H6 2.077 0.025 0.000
H7 1.043 -1.101 0.881
H8 1.043 -1.101 -0.881

Atom - Atom Distances (Å)
  C1 C2 F3 H4 H5 H6 H7 H8
C11.50981.36871.08821.08822.14402.14562.1456
C21.50982.35532.15682.15681.08711.08601.0860
F31.36872.35531.99631.99633.29242.62882.6288
H41.08822.15681.99631.76472.49852.49563.0559
H51.08822.15681.99631.76472.49853.05592.4956
H62.14401.08713.29242.49852.49851.76471.7647
H72.14561.08602.62882.49563.05591.76471.7630
H82.14561.08602.62883.05592.49561.76471.7630

picture of fluoroethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 110.230 C1 C2 H7 110.424
C1 C2 H8 110.424 C2 C1 F3 109.717
C2 C1 H4 111.192 C2 C1 H5 111.192
F3 C1 H4 108.143 F3 C1 H5 108.143
H4 C1 H5 108.350 H6 C2 H7 108.594
H6 C2 H8 108.594 H7 C2 H8 108.519
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability