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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: B3LYPultrafine/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 B3LYPultrafine/aug-cc-pV(T+d)Z
 hartrees
Energy at 0K-490.630358
Energy at 298.15K 
HF Energy-490.630358
Nuclear repulsion energy118.404434
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 B3LYPultrafine/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 2285 2285 53.29 216.35 0.06 0.12
2 A1 986 986 117.42 4.55 0.71 0.83
3 A1 852 852 74.59 6.44 0.09 0.17
4 A1 313 313 17.25 0.46 0.72 0.83
5 A2 734 734 0.00 6.43 0.75 0.86
6 B1 2296 2296 139.99 32.36 0.75 0.86
7 B1 711 711 123.76 2.38 0.75 0.86
8 B2 968 968 288.82 0.00 0.75 0.86
9 B2 894 894 4.09 3.91 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5019.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5019.2 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 B3LYPultrafine/aug-cc-pV(T+d)Z
ABC
0.81478 0.25540 0.20932

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/aug-cc-pV(T+d)Z

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.449
F2 0.000 1.287 -0.487
F3 0.000 -1.287 -0.487
H4 1.236 0.000 1.242
H5 -1.236 0.000 1.242

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.59171.59171.46851.4685
F21.59172.57382.48502.4850
F31.59172.57382.48502.4850
H41.46852.48502.48502.4722
H51.46852.48502.48502.4722

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 107.898 F2 Si1 H4 108.525
F2 Si1 H5 108.525 F3 Si1 H4 108.525
F3 Si1 H5 108.525 H4 Si1 H5 114.650
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/aug-cc-pV(T+d)Z Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 1.594      
2 F -0.629      
3 F -0.629      
4 H -0.168      
5 H -0.168      


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 1.560 1.560
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.094 0.000 0.000
y 0.000 -26.544 0.000
z 0.000 0.000 -23.335
Traceless
 xyz
x 1.845 0.000 0.000
y 0.000 -3.329 0.000
z 0.000 0.000 1.484
Polar
3z2-r22.968
x2-y23.450
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.063 0.000 0.000
y 0.000 3.807 0.000
z 0.000 0.000 3.829


<r2> (average value of r2) Å2
<r2> 58.246
(<r2>)1/2 7.632