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: B3LYP/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/6-31G**
 hartrees
Energy at 0K-179.063518
Energy at 298.15K-179.069103
Nuclear repulsion energy79.022202
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 B3LYP/6-31G**
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' 3127 3004 27.10      
2 A' 3053 2933 9.88      
3 A' 3034 2915 48.87      
4 A' 1541 1480 0.43      
5 A' 1513 1454 1.64      
6 A' 1446 1389 31.90      
7 A' 1414 1359 1.83      
8 A' 1141 1096 38.65      
9 A' 1079 1037 56.50      
10 A' 901 866 11.10      
11 A' 407 391 5.54      
12 A" 3138 3015 35.08      
13 A" 3074 2954 39.08      
14 A" 1497 1439 4.00      
15 A" 1305 1254 0.01      
16 A" 1200 1153 4.85      
17 A" 815 783 0.63      
18 A" 268 257 0.58      

Unscaled Zero Point Vibrational Energy (zpe) 14976.5 cm-1
Scaled (by 0.9608) Zero Point Vibrational Energy (zpe) 14389.4 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 B3LYP/6-31G**
ABC
1.20529 0.31166 0.27314

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.559 0.000
C2 1.124 -0.458 0.000
F3 -1.229 -0.096 0.000
H4 0.044 1.201 0.889
H5 0.044 1.201 -0.889
H6 2.096 0.048 0.000
H7 1.067 -1.095 0.887
H8 1.067 -1.095 -0.887

Atom - Atom Distances (Å)
  C1 C2 F3 H4 H5 H6 H7 H8
C11.51571.39291.09731.09732.15722.15862.1586
C21.51572.38092.16982.16981.09511.09371.0937
F31.39292.38092.02322.02323.32792.65592.6559
H41.09732.16982.02321.77802.51602.51323.0774
H51.09732.16982.02321.77802.51603.07742.5132
H62.15721.09513.32792.51602.51601.77521.7752
H72.15861.09372.65592.51323.07741.77521.7740
H82.15861.09372.65593.07742.51321.77521.7740

picture of fluoroethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 110.396 C1 C2 H7 110.591
C1 C2 H8 110.591 C2 C1 F3 109.811
C2 C1 H4 111.269 C2 C1 H5 111.269
F3 C1 H4 108.081 F3 C1 H5 108.081
H4 C1 H5 108.217 H6 C2 H7 108.400
H6 C2 H8 108.400 H7 C2 H8 108.388
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.138      
2 C -0.347      
3 F -0.324      
4 H 0.091      
5 H 0.091      
6 H 0.105      
7 H 0.123      
8 H 0.123      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.594 0.627 0.000 1.713
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.206 -0.178 0.000
y -0.178 -17.886 0.000
z 0.000 0.000 -18.014
Traceless
 xyz
x -2.256 -0.178 0.000
y -0.178 1.224 0.000
z 0.000 0.000 1.032
Polar
3z2-r22.064
x2-y2-2.320
xy-0.178
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.561 -0.076 0.000
y -0.076 3.531 0.000
z 0.000 0.000 3.409


<r2> (average value of r2) Å2
<r2> 51.184
(<r2>)1/2 7.154