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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: LSDA/aug-cc-pV(T+d)Z

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at LSDA/aug-cc-pV(T+d)Z
 hartrees
Energy at 0K-488.848727
Energy at 298.15K 
HF Energy-488.848727
Nuclear repulsion energy118.877579
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 LSDA/aug-cc-pV(T+d)Z
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 2214 2214 41.10 237.58 0.07 0.13
2 A1 932 932 112.00 5.03 0.60 0.75
3 A1 856 856 49.70 7.74 0.13 0.24
4 A1 302 302 15.48 0.52 0.72 0.84
5 A2 693 693 0.00 7.66 0.75 0.86
6 B1 2232 2232 110.91 35.50 0.75 0.86
7 B1 679 679 105.56 2.99 0.75 0.86
8 B2 959 959 235.12 0.71 0.75 0.86
9 B2 860 860 11.65 3.58 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4863.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4863.1 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 LSDA/aug-cc-pV(T+d)Z
ABC
0.81696 0.25811 0.21172

See section I.F.4 to change rotational constant units
Geometric Data calculated at LSDA/aug-cc-pV(T+d)Z

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.447
F2 0.000 1.279 -0.486
F3 0.000 -1.279 -0.486
H4 1.252 0.000 1.239
H5 -1.252 0.000 1.239

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.58291.58291.48181.4818
F21.58292.55782.48572.4857
F31.58292.55782.48572.4857
H41.48182.48572.48572.5049
H51.48182.48572.48572.5049

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 107.793 F2 Si1 H4 108.354
F2 Si1 H5 108.354 F3 Si1 H4 108.354
F3 Si1 H5 108.354 H4 Si1 H5 115.393
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/aug-cc-pV(T+d)Z Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 1.266      
2 F -0.521      
3 F -0.521      
4 H -0.112      
5 H -0.112      


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 1.475 1.475
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.048 0.000 0.000
y 0.000 -26.288 0.000
z 0.000 0.000 -23.277
Traceless
 xyz
x 1.734 0.000 0.000
y 0.000 -3.126 0.000
z 0.000 0.000 1.392
Polar
3z2-r22.784
x2-y23.240
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.348 0.000 0.000
y 0.000 4.022 0.000
z 0.000 0.000 4.055


<r2> (average value of r2) Å2
<r2> 57.810
(<r2>)1/2 7.603