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

using model chemistry: HF/3-21G*

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/3-21G*
 hartrees
Energy at 0K-275.443596
Energy at 298.15K 
HF Energy-275.443596
Nuclear repulsion energy131.905197
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/3-21G*
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' 3334 3010 59.18 42.74 0.09 0.17
2 A' 3300 2979 3.11 90.60 0.69 0.81
3 A' 3235 2920 2.06 93.73 0.03 0.05
4 A' 1653 1492 4.69 21.30 0.75 0.86
5 A' 1596 1441 41.23 2.77 0.68 0.81
6 A' 1565 1413 37.54 2.04 0.74 0.85
7 A' 1277 1153 48.67 2.04 0.10 0.19
8 A' 1227 1107 97.69 6.96 0.74 0.85
9 A' 937 845 8.80 8.70 0.18 0.30
10 A' 584 527 11.49 0.93 0.50 0.67
11 A' 476 429 21.41 1.18 0.62 0.77
12 A" 3309 2987 9.15 55.54 0.75 0.86
13 A" 1662 1500 0.42 14.69 0.75 0.86
14 A" 1563 1411 51.58 12.03 0.75 0.86
15 A" 1317 1189 110.14 4.27 0.75 0.86
16 A" 1091 985 39.41 6.12 0.75 0.86
17 A" 385 347 0.01 0.30 0.75 0.86
18 A" 258 233 0.14 0.01 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14384.1 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 12983.1 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/3-21G*
ABC
0.30934 0.30151 0.17117

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.328 0.172 0.000
C2 -0.910 1.022 0.000
H3 1.237 0.742 0.000
F4 0.328 -0.643 1.112
F5 0.328 -0.643 -1.112
H6 -1.780 0.380 0.000
H7 -0.930 1.645 0.883
H8 -0.930 1.645 -0.883

Atom - Atom Distances (Å)
  C1 C2 H3 F4 F5 H6 H7 H8
C11.50151.07351.37841.37842.11772.12852.1285
C21.50152.16512.35372.35371.08141.08051.0805
H31.07352.16511.99561.99563.03852.50792.5079
F41.37842.35371.99562.22352.59292.62083.2854
F51.37842.35371.99562.22352.59293.28542.6208
H62.11771.08143.03852.59292.59291.76121.7612
H72.12851.08052.50792.62083.28541.76121.7654
H82.12851.08052.50793.28542.62081.76121.7654

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 109.067 C1 C2 H7 109.982
C1 C2 H8 109.982 C2 C1 H3 113.406
C2 C1 F4 109.557 C2 C1 F5 109.557
H3 C1 F4 108.313 H3 C1 F5 108.313
F4 C1 F5 107.520 H6 C2 H7 109.111
H6 C2 H8 109.111 H7 C2 H8 109.567
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.581      
2 C -0.695      
3 H 0.211      
4 F -0.406      
5 F -0.406      
6 H 0.253      
7 H 0.231      
8 H 0.231      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.315 2.623 0.000 2.642
CHELPG -2.479 0.938 0.000 2.650
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.145 0.793 0.000
y 0.793 -22.872 0.000
z 0.000 0.000 -25.923
Traceless
 xyz
x 3.252 0.793 0.000
y 0.793 0.662 0.000
z 0.000 0.000 -3.914
Polar
3z2-r2-7.828
x2-y21.727
xy0.793
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.825 0.004 0.000
y 0.004 2.810 0.000
z 0.000 0.000 2.919


<r2> (average value of r2) Å2
<r2> 72.333
(<r2>)1/2 8.505