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: B3LYP/CEP-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/CEP-31G
 hartrees
Energy at 0K-62.035310
Energy at 298.15K 
HF Energy-62.035310
Nuclear repulsion energy74.041715
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/CEP-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' 3173 3073 47.68 30.49 0.56 0.72
2 A' 3139 3040 28.63 122.74 0.34 0.51
3 A' 3069 2972 6.25 151.34 0.02 0.03
4 A' 1490 1443 7.45 13.79 0.75 0.86
5 A' 1441 1395 44.00 3.50 0.46 0.63
6 A' 1363 1320 25.09 3.87 0.64 0.78
7 A' 1160 1124 31.18 4.57 0.43 0.60
8 A' 1094 1059 88.70 5.53 0.57 0.73
9 A' 844 818 14.41 10.42 0.15 0.27
10 A' 519 503 9.98 2.28 0.45 0.63
11 A' 420 407 16.81 1.98 0.72 0.84
12 A" 3161 3061 27.93 61.67 0.75 0.86
13 A" 1493 1446 6.21 12.91 0.75 0.86
14 A" 1353 1310 22.90 6.37 0.75 0.86
15 A" 1121 1086 103.61 7.69 0.75 0.86
16 A" 895 867 95.97 7.98 0.75 0.86
17 A" 358 347 0.17 0.84 0.75 0.86
18 A" 221 214 0.10 0.01 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13157.4 cm-1
Scaled (by 0.9684) Zero Point Vibrational Energy (zpe) 12741.7 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 B3LYP/CEP-31G
ABC
0.29033 0.28385 0.16089

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.331 0.193 0.000
C2 -0.926 1.060 0.000
H3 1.296 0.724 0.000
F4 0.331 -0.669 1.148
F5 0.331 -0.669 -1.148
H6 -1.817 0.414 0.000
H7 -0.940 1.698 0.899
H8 -0.940 1.698 -0.899

Atom - Atom Distances (Å)
  C1 C2 H3 F4 F5 H6 H7 H8
C11.52731.10111.43591.43592.16002.16562.1656
C21.52732.24692.42692.42691.10121.10241.1024
H31.10112.24692.04682.04683.12862.59912.5991
F41.43592.42692.04682.29652.66622.69883.3781
F51.43592.42692.04682.29652.66623.37812.6988
H62.16001.10123.12862.66622.66621.79651.7965
H72.16561.10242.59912.69883.37811.79651.7976
H82.16561.10242.59913.37812.69881.79651.7976

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 109.455 C1 C2 H7 109.828
C1 C2 H8 109.828 C2 C1 H3 116.560
C2 C1 F4 109.938 C2 C1 F5 109.938
H3 C1 F4 106.831 H3 C1 F5 106.831
F4 C1 F5 106.201 H6 C2 H7 109.234
H6 C2 H8 109.234 H7 C2 H8 109.245
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.013      
2 C -0.297      
3 H 0.202      
4 F -0.208      
5 F -0.208      
6 H 0.179      
7 H 0.160      
8 H 0.160      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.467 3.140 0.000 3.175
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.919 0.784 0.000
y 0.784 -22.956 0.000
z 0.000 0.000 -26.567
Traceless
 xyz
x 3.843 0.784 0.000
y 0.784 0.787 0.000
z 0.000 0.000 -4.630
Polar
3z2-r2-9.259
x2-y22.037
xy0.784
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.158 -0.220 0.000
y -0.220 3.319 0.000
z 0.000 0.000 3.465


<r2> (average value of r2) Å2
<r2> 64.272
(<r2>)1/2 8.017