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 C2H5F (fluoroethane)

using model chemistry: TPSSh/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 TPSSh/6-31G(2df,p)
 hartrees
Energy at 0K-179.072092
Energy at 298.15K-179.077643
HF Energy-179.072092
Nuclear repulsion energy79.135732
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 TPSSh/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' 3116 3007 28.66      
2 A' 3041 2934 11.25      
3 A' 3019 2914 50.02      
4 A' 1535 1482 0.19      
5 A' 1510 1457 1.05      
6 A' 1434 1384 27.00      
7 A' 1404 1355 0.46      
8 A' 1133 1093 38.26      
9 A' 1074 1036 55.92      
10 A' 892 861 9.51      
11 A' 395 381 4.64      
12 A" 3129 3019 36.56      
13 A" 3060 2953 38.34      
14 A" 1495 1443 3.29      
15 A" 1302 1256 0.08      
16 A" 1197 1155 4.18      
17 A" 800 772 0.49      
18 A" 253 244 0.48      

Unscaled Zero Point Vibrational Energy (zpe) 14895.2 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 14373.9 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 TPSSh/6-31G(2df,p)
ABC
1.20807 0.31248 0.27397

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.553 0.000
C2 1.117 -0.471 0.000
F3 -1.228 -0.077 0.000
H4 0.071 1.196 0.888
H5 0.071 1.196 -0.888
H6 2.088 0.035 0.000
H7 1.060 -1.110 0.887
H8 1.060 -1.110 -0.887

Atom - Atom Distances (Å)
  C1 C2 F3 H4 H5 H6 H7 H8
C11.51551.38021.09901.09902.15092.16212.1621
C21.51552.37792.15962.15961.09511.09451.0945
F31.38022.37792.02412.02413.31772.66252.6625
H41.09902.15962.02411.77662.49082.50893.0736
H51.09902.15962.02411.77662.49083.07362.5089
H62.15091.09513.31772.49082.49081.77601.7760
H72.16211.09452.66252.50893.07361.77601.7746
H82.16211.09452.66253.07362.50891.77601.7746

picture of fluoroethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 109.916 C1 C2 H7 110.842
C1 C2 H8 110.842 C2 C1 F3 110.319
C2 C1 H4 110.368 C2 C1 H5 110.368
F3 C1 H4 108.935 F3 C1 H5 108.935
H4 C1 H5 107.859 H6 C2 H7 108.415
H6 C2 H8 108.415 H7 C2 H8 108.335
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability