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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: B1B95/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B1B95/6-31G
 hartrees
Energy at 0K-490.346161
Energy at 298.15K 
HF Energy-490.346161
Nuclear repulsion energy112.880479
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 B1B95/6-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 2269 2164 70.86 181.00 0.11 0.20
2 A1 933 890 144.93 26.57 0.65 0.79
3 A1 791 755 33.81 7.68 0.19 0.32
4 A1 272 259 24.35 1.67 0.75 0.86
5 A2 694 662 0.00 23.48 0.75 0.86
6 B1 2296 2190 166.13 53.70 0.75 0.86
7 B1 675 644 124.61 10.25 0.75 0.86
8 B2 963 918 246.48 5.95 0.75 0.86
9 B2 851 811 1.69 10.87 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4871.7 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 4646.2 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 B1B95/6-31G
ABC
0.73286 0.23322 0.18962

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.484
F2 0.000 1.348 -0.518
F3 0.000 -1.348 -0.518
H4 1.258 0.000 1.273
H5 -1.258 0.000 1.273

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.67961.67961.48581.4858
F21.67962.69692.57112.5711
F31.67962.69692.57112.5711
H41.48582.57112.57112.5170
H51.48582.57112.57112.5170

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 106.804 F2 Si1 H4 108.476
F2 Si1 H5 108.476 F3 Si1 H4 108.476
F3 Si1 H5 108.476 H4 Si1 H5 115.778
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 1.176      
2 F -0.465      
3 F -0.465      
4 H -0.123      
5 H -0.123      


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 2.823 2.823
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.634 0.000 0.000
y 0.000 -28.690 0.000
z 0.000 0.000 -23.048
Traceless
 xyz
x 3.235 0.000 0.000
y 0.000 -5.848 0.000
z 0.000 0.000 2.614
Polar
3z2-r25.228
x2-y26.055
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.002 0.000 0.000
y 0.000 2.732 0.000
z 0.000 0.000 2.764


<r2> (average value of r2) Å2
<r2> 62.724
(<r2>)1/2 7.920