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

using model chemistry: MP2/CEP-31G*

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/CEP-31G*
 hartrees
Energy at 0K-51.979340
Energy at 298.15K 
HF Energy-51.571914
Nuclear repulsion energy28.396852
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/CEP-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 815 774 135.62 3.90 0.66 0.80
2 A1 326 310 19.23 1.17 0.30 0.46
3 B2 819 778 180.05 7.61 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 980.4 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 930.8 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/CEP-31G*
ABC
0.94307 0.28113 0.21657

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.592
F2 0.000 1.256 -0.461
F3 0.000 -1.256 -0.461

Atom - Atom Distances (Å)
  Si1 F2 F3
Si11.63941.6394
F21.63942.5125
F31.63942.5125

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 100.045
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 2 (3B1)

Jump to S1C1
Energy calculated at MP2/CEP-31G*
 hartrees
Energy at 0K-51.868663
Energy at 298.15K-51.748855
HF Energy-51.486953
Nuclear repulsion energy27.516417
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/CEP-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 787 747 68.65      
2 A1 259 246 19.28      
3 B2 897 852 162.00      

Unscaled Zero Point Vibrational Energy (zpe) 971.4 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 922.2 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 MP2/CEP-31G*
ABC
1.33451 0.23397 0.19907

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G*

Point Group is C2v

Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability