return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: B2PLYP=FULL/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B2PLYP=FULL/aug-cc-pVDZ
 hartrees
Energy at 0K-490.263878
Energy at 298.15K 
HF Energy-490.091222
Nuclear repulsion energy115.607585
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 B2PLYP=FULL/aug-cc-pVDZ
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 2312 2224 46.90 219.89 0.06 0.12
2 A1 973 936 114.37 5.54 0.73 0.84
3 A1 821 790 77.87 8.30 0.08 0.16
4 A1 291 280 17.39 0.61 0.71 0.83
5 A2 721 693 0.00 6.81 0.75 0.86
6 B1 2332 2243 112.88 34.44 0.75 0.86
7 B1 699 672 117.59 2.57 0.75 0.86
8 B2 941 905 269.74 0.08 0.75 0.86
9 B2 869 836 22.14 4.61 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4979.4 cm-1
Scaled (by 0.9618) Zero Point Vibrational Energy (zpe) 4789.2 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 B2PLYP=FULL/aug-cc-pVDZ
ABC
0.76924 0.24464 0.19944

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/aug-cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.469
F2 0.000 1.316 -0.504
F3 0.000 -1.316 -0.504
H4 1.250 0.000 1.252
H5 -1.250 0.000 1.252

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.63591.63591.47511.4751
F21.63592.63112.52512.5251
F31.63592.63112.52512.5251
H41.47512.52512.52512.4996
H51.47512.52512.52512.4996

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 107.060 F2 Si1 H4 108.405
F2 Si1 H5 108.405 F3 Si1 H4 108.405
F3 Si1 H5 108.405 H4 Si1 H5 115.829
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability