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All results from a given calculation for CH3CHF2 (Ethane, 1,1-difluoro-)

using model chemistry: HF/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 HF/CEP-31G*
 hartrees
Energy at 0K-61.046255
Energy at 298.15K 
HF Energy-61.046255
Nuclear repulsion energy76.784218
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 HF/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' 3350 3008 113.27 36.87 0.03 0.06
2 A' 3326 2987 3.27 107.13 0.60 0.75
3 A' 3249 2917 12.92 146.25 0.03 0.05
4 A' 1614 1450 18.06 12.96 0.74 0.85
5 A' 1593 1430 64.49 2.40 0.19 0.32
6 A' 1508 1354 12.47 2.11 0.33 0.50
7 A' 1269 1140 110.34 3.00 0.34 0.50
8 A' 1245 1118 50.00 7.37 0.62 0.77
9 A' 937 841 12.55 7.76 0.23 0.38
10 A' 608 546 8.50 1.14 0.57 0.73
11 A' 496 446 18.16 0.78 0.59 0.74
12 A" 3329 2989 41.35 58.26 0.75 0.86
13 A" 1614 1450 0.08 9.89 0.75 0.86
14 A" 1526 1371 47.77 6.65 0.75 0.86
15 A" 1274 1144 198.19 4.83 0.75 0.86
16 A" 1055 948 67.46 6.77 0.75 0.86
17 A" 400 359 0.00 0.23 0.75 0.86
18 A" 246 221 0.09 0.01 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14319.6 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 12859.0 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 HF/CEP-31G*
ABC
0.32150 0.29723 0.17329

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.327 0.160 0.000
C2 -0.913 1.038 0.000
H3 1.264 0.711 0.000
F4 0.327 -0.647 1.087
F5 0.327 -0.647 -1.087
H6 -1.801 0.408 0.000
H7 -0.916 1.668 0.889
H8 -0.916 1.668 -0.889

Atom - Atom Distances (Å)
  C1 C2 H3 F4 F5 H6 H7 H8
C11.51931.08671.35401.35402.14242.14682.1468
C21.51932.20122.35782.35781.08941.08961.0896
H31.08672.20121.97561.97563.07992.54102.5410
F41.35402.35781.97562.17422.61202.63493.2877
F51.35402.35781.97562.17422.61203.28772.6349
H62.14241.08943.07992.61202.61201.77861.7786
H72.14681.08962.54102.63493.28771.77861.7782
H82.14681.08962.54103.28772.63491.77861.7782

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 109.313 C1 C2 H7 109.644
C1 C2 H8 109.644 C2 C1 H3 114.239
C2 C1 F4 110.154 C2 C1 F5 110.154
H3 C1 F4 107.583 H3 C1 F5 107.583
F4 C1 F5 106.820 H6 C2 H7 109.424
H6 C2 H8 109.424 H7 C2 H8 109.378
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.220      
2 C -0.221      
3 H 0.143      
4 F -0.258      
5 F -0.258      
6 H 0.133      
7 H 0.120      
8 H 0.120      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.306 2.486 0.000 2.505
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.232 0.756 0.000
y 0.756 -22.819 0.000
z 0.000 0.000 -25.481
Traceless
 xyz
x 2.918 0.756 0.000
y 0.756 0.537 0.000
z 0.000 0.000 -3.456
Polar
3z2-r2-6.911
x2-y21.587
xy0.756
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.177 -0.117 0.000
y -0.117 3.181 0.000
z 0.000 0.000 3.172


<r2> (average value of r2) Å2
<r2> 60.890
(<r2>)1/2 7.803