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All results from a given calculation for SiHF3 (trifluorosilane)

using model chemistry: QCISD/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at QCISD/6-31G*
 hartrees
Energy at 0K-588.625549
Energy at 298.15K 
HF Energy-588.016895
Nuclear repulsion energy186.295628
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 QCISD/6-31G*
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 2424 2308 90.61      
2 A1 866 825 79.28      
3 A1 425 405 77.30      
4 E 1038 989 267.80      
4 E 1038 989 267.80      
5 E 872 831 24.21      
5 E 872 831 24.21      
6 E 304 289 14.07      
6 E 304 289 14.07      

Unscaled Zero Point Vibrational Energy (zpe) 4072.2 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 3878.0 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 QCISD/6-31G*
ABC
0.23259 0.23259 0.13352

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.328
H2 0.000 0.000 1.794
F3 0.000 1.488 -0.236
F4 1.289 -0.744 -0.236
F5 -1.289 -0.744 -0.236

Atom - Atom Distances (Å)
  Si1 H2 F3 F4 F5
Si11.46601.59151.59151.5915
H21.46602.51702.51702.5170
F31.59152.51702.57792.5779
F41.59152.51702.57792.5779
F51.59152.51702.57792.5779

picture of trifluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 Si1 F3 110.745 H2 Si1 F4 110.745
H2 Si1 F5 110.745 F3 Si1 F4 108.167
F3 Si1 F5 108.167 F4 Si1 F5 108.167
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability