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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: M06-2X/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 M06-2X/aug-cc-pV(T+d)Z
 hartrees
Energy at 0K-490.523725
Energy at 298.15K 
HF Energy-490.523725
Nuclear repulsion energy119.107821
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 M06-2X/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 2342 2342 51.63 202.42 0.06 0.11
2 A1 1000 1000 122.64 3.62 0.72 0.84
3 A1 882 882 75.68 5.15 0.11 0.19
4 A1 321 321 19.30 0.39 0.72 0.84
5 A2 745 745 0.00 5.51 0.75 0.86
6 B1 2352 2352 127.94 27.12 0.75 0.86
7 B1 723 723 135.74 2.06 0.75 0.86
8 B2 988 988 299.81 0.02 0.75 0.86
9 B2 916 916 0.00 3.45 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5133.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5133.7 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 M06-2X/aug-cc-pV(T+d)Z
ABC
0.81609 0.25988 0.21226

See section I.F.4 to change rotational constant units
Geometric Data calculated at M06-2X/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 1.275 -0.487
F3 0.000 -1.275 -0.487
H4 1.231 0.000 1.240
H5 -1.231 0.000 1.240

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.58261.58261.46281.4628
F21.58262.55092.47512.4751
F31.58262.55092.47512.4751
H41.46282.47512.47512.4611
H51.46282.47512.47512.4611

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 107.404 F2 Si1 H4 108.667
F2 Si1 H5 108.667 F3 Si1 H4 108.667
F3 Si1 H5 108.667 H4 Si1 H5 114.542
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at M06-2X/aug-cc-pV(T+d)Z Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 1.421      
2 F -0.559      
3 F -0.559      
4 H -0.152      
5 H -0.152      


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 1.655 1.655
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.830 0.000 0.000
y 0.000 -26.442 0.000
z 0.000 0.000 -23.152
Traceless
 xyz
x 1.967 0.000 0.000
y 0.000 -3.451 0.000
z 0.000 0.000 1.484
Polar
3z2-r22.967
x2-y23.612
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.860 0.000 0.000
y 0.000 3.616 0.000
z 0.000 0.000 3.627


<r2> (average value of r2) Å2
<r2> 57.571
(<r2>)1/2 7.588