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 IF (Iodine monofluoride)

using model chemistry: CISD/LANL2DZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 1Σ
Energy calculated at CISD/LANL2DZ
 hartrees
Energy at 0K-110.698184
Energy at 298.15K-110.696332
HF Energy-110.552636
Nuclear repulsion energy16.613125
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 CISD/LANL2DZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σ 550 507 5.52      

Unscaled Zero Point Vibrational Energy (zpe) 274.7 cm-1
Scaled (by 0.9218) Zero Point Vibrational Energy (zpe) 253.3 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 CISD/LANL2DZ
B
0.25333

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/LANL2DZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
I1 0.000 0.000 0.291
F2 0.000 0.000 -1.715

Atom - Atom Distances (Å)
  I1 F2
I12.0067
F22.0067

picture of Iodine monofluoride state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability