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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: mPW1PW91/daug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/daug-cc-pVTZ
 hartrees
Energy at 0K-490.556684
Energy at 298.15K 
HF Energy-490.556684
Nuclear repulsion energy118.194809
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/daug-cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 2293 2293 51.33 213.14 0.06 0.12
2 A1 975 975 115.22 4.43 0.70 0.82
3 A1 859 859 71.66 6.66 0.09 0.17
4 A1 310 310 17.42 0.43 0.72 0.84
5 A2 728 728 0.00 6.44 0.75 0.86
6 B1 2306 2306 130.58 31.85 0.75 0.86
7 B1 709 709 122.91 2.29 0.75 0.86
8 B2 968 968 285.19 0.04 0.75 0.86
9 B2 896 896 0.04 3.83 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5021.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5021.9 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/daug-cc-pVTZ
ABC
0.80940 0.25492 0.20877

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/daug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.451
F2 0.000 1.288 -0.489
F3 0.000 -1.288 -0.489
H4 1.241 0.000 1.246
H5 -1.241 0.000 1.246

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.59431.59431.47401.4740
F21.59432.57582.49162.4916
F31.59432.57582.49162.4916
H41.47402.49162.49162.4826
H51.47402.49162.49162.4826

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 107.765 F2 Si1 H4 108.534
F2 Si1 H5 108.534 F3 Si1 H4 108.534
F3 Si1 H5 108.534 H4 Si1 H5 114.734
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 1.713      
2 F -0.858      
3 F -0.858      
4 H 0.001      
5 H 0.001      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 1.591 1.591
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.850 0.000 0.000
y 0.000 -26.375 0.000
z 0.000 0.000 -23.134
Traceless
 xyz
x 1.905 0.000 0.000
y 0.000 -3.383 0.000
z 0.000 0.000 1.479
Polar
3z2-r22.957
x2-y23.525
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.065 0.000 0.000
y 0.000 3.787 0.000
z 0.000 0.000 3.822


<r2> (average value of r2) Å2
<r2> 58.255
(<r2>)1/2 7.632