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

using model chemistry: mPW1PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/3-21G*
 hartrees
Energy at 0K-276.728601
Energy at 298.15K 
HF Energy-276.728601
Nuclear repulsion energy130.832059
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 mPW1PW91/3-21G*
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' 3194 3033 11.83 39.21 0.69 0.82
2 A' 3114 2957 54.30 110.29 0.27 0.42
3 A' 3109 2952 3.27 73.73 0.02 0.04
4 A' 1553 1475 5.81 19.95 0.75 0.86
5 A' 1480 1406 45.02 3.92 0.75 0.85
6 A' 1450 1377 30.63 3.29 0.75 0.86
7 A' 1194 1134 34.76 1.79 0.12 0.22
8 A' 1152 1094 85.45 5.19 0.73 0.85
9 A' 895 850 4.81 6.87 0.20 0.34
10 A' 548 521 6.98 1.02 0.58 0.73
11 A' 441 419 15.10 1.24 0.67 0.81
12 A" 3196 3035 6.59 52.09 0.75 0.86
13 A" 1560 1481 1.30 14.75 0.75 0.86
14 A" 1445 1372 41.53 12.27 0.75 0.86
15 A" 1221 1159 97.51 3.99 0.75 0.86
16 A" 1009 958 30.87 5.47 0.75 0.86
17 A" 355 337 0.01 0.37 0.75 0.86
18 A" 262 249 0.12 0.01 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13588.2 cm-1
Scaled (by 0.9496) Zero Point Vibrational Energy (zpe) 12903.3 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 mPW1PW91/3-21G*
ABC
0.30124 0.30018 0.16861

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.329 0.173 0.000
C2 -0.913 1.021 0.000
H3 1.246 0.765 0.000
F4 0.329 -0.644 1.127
F5 0.329 -0.644 -1.127
H6 -1.786 0.366 0.000
H7 -0.936 1.650 0.891
H8 -0.936 1.650 -0.891

Atom - Atom Distances (Å)
  C1 C2 H3 F4 F5 H6 H7 H8
C11.50341.09181.39221.39222.12392.13912.1391
C21.50342.17372.36322.36321.09201.09091.0909
H31.09182.17372.02432.02433.05852.51802.5180
F41.39222.36322.02432.25472.60112.63013.3071
F51.39222.36322.02432.25472.60113.30712.6301
H62.12391.09203.05852.60112.60111.77871.7787
H72.13911.09092.51802.63013.30711.77871.7827
H82.13911.09092.51803.30712.63011.77871.7827

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 108.804 C1 C2 H7 110.068
C1 C2 H8 110.068 C2 C1 H3 112.808
C2 C1 F4 109.336 C2 C1 F5 109.336
H3 C1 F4 108.553 H3 C1 F5 108.553
F4 C1 F5 108.144 H6 C2 H7 109.146
H6 C2 H8 109.146 H7 C2 H8 109.584
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.375      
2 C -0.712      
3 H 0.213      
4 F -0.304      
5 F -0.304      
6 H 0.257      
7 H 0.238      
8 H 0.238      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.318 2.162 0.000 2.185
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.115 0.643 0.000
y 0.643 -22.418 0.000
z 0.000 0.000 -24.949
Traceless
 xyz
x 2.569 0.643 0.000
y 0.643 0.614 0.000
z 0.000 0.000 -3.183
Polar
3z2-r2-6.366
x2-y21.303
xy0.643
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.999 -0.032 0.000
y -0.032 3.006 0.000
z 0.000 0.000 3.110


<r2> (average value of r2) Å2
<r2> 72.875
(<r2>)1/2 8.537