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: QCISD/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-178.601729
Energy at 298.15K-178.607325
HF Energy-178.089008
Nuclear repulsion energy78.796197
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/cc-pVDZ
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' 3156 3028 25.16      
2 A' 3072 2947 16.33      
3 A' 3065 2940 41.30      
4 A' 1526 1464 0.18      
5 A' 1501 1440 1.75      
6 A' 1447 1388 33.25      
7 A' 1401 1344 1.20      
8 A' 1138 1092 42.55      
9 A' 1107 1062 48.44      
10 A' 905 868 15.41      
11 A' 409 392 5.85      
12 A" 3165 3036 35.36      
13 A" 3117 2990 33.61      
14 A" 1480 1420 3.94      
15 A" 1307 1254 0.31      
16 A" 1199 1150 5.34      
17 A" 812 779 0.14      
18 A" 265 254 0.80      

Unscaled Zero Point Vibrational Energy (zpe) 15035.1 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 14424.7 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/cc-pVDZ
ABC
1.19393 0.31084 0.27248

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.560 0.000
C2 1.125 -0.462 0.000
F3 -1.229 -0.094 0.000
H4 0.044 1.205 0.898
H5 0.044 1.205 -0.898
H6 2.104 0.050 0.000
H7 1.062 -1.103 0.896
H8 1.062 -1.103 -0.896

Atom - Atom Distances (Å)
  C1 C2 F3 H4 H5 H6 H7 H8
C11.51971.39231.10601.10602.16522.16732.1673
C21.51972.38272.18002.18001.10501.10391.1039
F31.39232.38272.02792.02793.33662.65902.6590
H41.10602.18002.02791.79522.52702.52283.0954
H51.10602.18002.02791.79522.52703.09542.5228
H62.16521.10503.33662.52702.52701.79451.7945
H72.16731.10392.65902.52283.09541.79451.7920
H82.16731.10392.65903.09542.52281.79451.7920

picture of fluoroethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 110.164 C1 C2 H7 110.393
C1 C2 H8 110.393 C2 C1 F3 109.739
C2 C1 H4 111.270 C2 C1 H5 111.270
F3 C1 H4 107.975 F3 C1 H5 107.975
H4 C1 H5 108.495 H6 C2 H7 108.660
H6 C2 H8 108.660 H7 C2 H8 108.519
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability