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/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBE1PBE/6-31G
 hartrees
Energy at 0K-277.955167
Energy at 298.15K 
HF Energy-277.955167
Nuclear repulsion energy130.204477
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/6-31G
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' 3204 3062 13.67 35.58 0.66 0.80
2 A' 3155 3016 35.18 109.95 0.32 0.49
3 A' 3101 2964 1.73 105.15 0.01 0.02
4 A' 1529 1462 7.39 17.46 0.75 0.86
5 A' 1478 1413 50.32 4.08 0.74 0.85
6 A' 1421 1358 26.33 2.85 0.75 0.86
7 A' 1200 1147 34.23 2.36 0.37 0.54
8 A' 1149 1098 84.53 4.76 0.62 0.76
9 A' 891 852 11.33 7.39 0.19 0.32
10 A' 546 522 9.71 1.14 0.51 0.68
11 A' 440 421 16.67 1.62 0.71 0.83
12 A" 3198 3057 7.07 56.27 0.75 0.86
13 A" 1532 1465 4.25 14.80 0.75 0.86
14 A" 1408 1346 32.63 9.39 0.75 0.86
15 A" 1185 1133 103.45 4.46 0.75 0.86
16 A" 970 927 59.33 6.27 0.75 0.86
17 A" 373 357 0.06 0.50 0.75 0.86
18 A" 254 243 0.09 0.01 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13516.8 cm-1
Scaled (by 0.9559) Zero Point Vibrational Energy (zpe) 12920.7 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 PBE1PBE/6-31G
ABC
0.29870 0.29725 0.16704

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.325 0.183 0.000
C2 -0.905 1.032 0.000
H3 1.269 0.731 0.000
F4 0.325 -0.652 1.132
F5 0.325 -0.652 -1.132
H6 -1.789 0.390 0.000
H7 -0.929 1.666 0.889
H8 -0.929 1.666 -0.889

Atom - Atom Distances (Å)
  C1 C2 H3 F4 F5 H6 H7 H8
C11.49481.09131.40731.40732.12452.13562.1356
C21.49482.19482.37342.37341.09251.09221.0922
H31.09132.19482.02182.02183.07712.54802.5480
F41.40732.37342.02182.26492.61522.64673.3215
F51.40732.37342.02182.26492.61523.32152.6467
H62.12451.09253.07712.61522.61521.77741.7774
H72.13561.09222.54802.64673.32151.77741.7782
H82.13561.09222.54803.32152.64671.77741.7782

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 109.418 C1 C2 H7 110.311
C1 C2 H8 110.311 C2 C1 H3 115.254
C2 C1 F4 109.698 C2 C1 F5 109.698
H3 C1 F4 107.352 H3 C1 F5 107.352
F4 C1 F5 107.158 H6 C2 H7 108.892
H6 C2 H8 108.892 H7 C2 H8 108.984
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.422      
2 C -0.546      
3 H 0.178      
4 F -0.328      
5 F -0.328      
6 H 0.213      
7 H 0.195      
8 H 0.195      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.402 2.607 0.000 2.638
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.013 0.598 0.000
y 0.598 -22.664 0.000
z 0.000 0.000 -25.707
Traceless
 xyz
x 3.172 0.598 0.000
y 0.598 0.696 0.000
z 0.000 0.000 -3.869
Polar
3z2-r2-7.737
x2-y21.650
xy0.598
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.140 -0.060 0.000
y -0.060 3.219 0.000
z 0.000 0.000 3.376


<r2> (average value of r2) Å2
<r2> 73.588
(<r2>)1/2 8.578