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 CH3CHF2 (Ethane, 1,1-difluoro-)

using model chemistry: PBE1PBE/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBE1PBE/6-31+G**
 hartrees
Energy at 0K-278.043200
Energy at 298.15K 
HF Energy-278.043200
Nuclear repulsion energy132.148367
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 PBE1PBE/6-31+G**
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' 3186 3043 9.87 41.20 0.71 0.83
2 A' 3117 2978 35.41 115.20 0.27 0.42
3 A' 3086 2949 2.45 126.15 0.01 0.02
4 A' 1485 1419 7.28 8.68 0.75 0.86
5 A' 1442 1378 81.32 1.72 0.48 0.65
6 A' 1384 1323 3.32 0.91 0.69 0.81
7 A' 1165 1113 85.01 2.91 0.25 0.40
8 A' 1158 1106 53.91 3.20 0.66 0.80
9 A' 882 842 7.98 6.20 0.20 0.34
10 A' 565 540 5.77 0.75 0.47 0.64
11 A' 464 443 13.73 1.04 0.64 0.78
12 A" 3182 3040 6.40 56.27 0.75 0.86
13 A" 1486 1419 1.16 5.92 0.75 0.86
14 A" 1386 1324 28.19 6.49 0.75 0.86
15 A" 1158 1106 176.80 2.14 0.75 0.86
16 A" 956 914 64.66 4.21 0.75 0.86
17 A" 382 365 0.20 0.31 0.75 0.86
18 A" 235 224 0.05 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13358.9 cm-1
Scaled (by 0.9553) Zero Point Vibrational Energy (zpe) 12761.8 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 PBE1PBE/6-31+G**
ABC
0.31494 0.29922 0.17214

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.322 0.167 0.000
C2 -0.900 1.037 0.000
H3 1.271 0.713 0.000
F4 0.322 -0.649 1.100
F5 0.322 -0.649 -1.100
H6 -1.794 0.409 0.000
H7 -0.905 1.671 0.890
H8 -0.905 1.671 -0.890

Atom - Atom Distances (Å)
  C1 C2 H3 F4 F5 H6 H7 H8
C11.49991.09531.36931.36932.13012.13532.1353
C21.49992.19512.35462.35461.09281.09261.0926
H31.09532.19511.99151.99153.08062.53872.5387
F41.36932.35461.99152.19972.60912.63263.2932
F51.36932.35461.99152.19972.60913.29322.6326
H62.13011.09283.08062.60912.60911.78181.7818
H72.13531.09262.53872.63263.29321.78181.7796
H82.13531.09262.53873.29322.63261.78181.7796

picture of Ethane, 1,1-difluoro- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 109.484 C1 C2 H7 109.904
C1 C2 H8 109.904 C2 C1 H3 114.619
C2 C1 F4 110.214 C2 C1 F5 110.214
H3 C1 F4 107.288 H3 C1 F5 107.288
F4 C1 F5 106.878 H6 C2 H7 109.239
H6 C2 H8 109.239 H7 C2 H8 109.052
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.431      
2 C -0.565      
3 H 0.146      
4 F -0.298      
5 F -0.298      
6 H 0.203      
7 H 0.191      
8 H 0.191      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.376 2.380 0.000 2.409
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.538 0.515 0.000
y 0.515 -23.040 0.000
z 0.000 0.000 -25.661
Traceless
 xyz
x 2.813 0.515 0.000
y 0.515 0.559 0.000
z 0.000 0.000 -3.372
Polar
3z2-r2-6.744
x2-y21.502
xy0.515
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.927 -0.128 0.000
y -0.128 3.976 0.000
z 0.000 0.000 4.000


<r2> (average value of r2) Å2
<r2> 72.256
(<r2>)1/2 8.500