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All results from a given calculation for SiF2 (Silicon difluoride)

using model chemistry: MP2=FULL/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
2 1 yes C2V 3B1

State 1 (1A1)

Jump to S2C1
Energy calculated at MP2=FULL/3-21G*
 hartrees
Energy at 0K-485.734501
Energy at 298.15K 
HF Energy-485.412581
Nuclear repulsion energy100.792810
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 MP2=FULL/3-21G*
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 974 923 90.88 4.27 0.47 0.64
2 A1 371 352 22.91 0.75 0.51 0.67
3 B2 1019 966 108.47 4.68 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 1181.9 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 1120.5 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 MP2=FULL/3-21G*
ABC
1.00177 0.29306 0.22673

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.575
F2 0.000 1.230 -0.447
F3 0.000 -1.230 -0.447

Atom - Atom Distances (Å)
  Si1 F2 F3
Si11.59941.5994
F21.59942.4608
F31.59942.4608

picture of Silicon difluoride state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 100.575
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 2 (3B1)

Jump to S1C1
Energy calculated at MP2=FULL/3-21G*
 hartrees
Energy at 0K-485.616979
Energy at 298.15K-485.497279
HF Energy-485.318955
Nuclear repulsion energy98.874170
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 MP2=FULL/3-21G*
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 906 859 41.69      
2 A1 288 273 21.23      
3 B2 1056 1001 96.94      

Unscaled Zero Point Vibrational Energy (zpe) 1124.6 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 1066.1 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 MP2=FULL/3-21G*
ABC
1.39024 0.24277 0.20668

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G*

Point Group is C2v

Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability