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: B3LYP/3-21G

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 B3LYP/3-21G
 hartrees
Energy at 0K-6989.805835
Energy at 298.15K-6989.804002
HF Energy-6989.805835
Nuclear repulsion energy126.162089
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 B3LYP/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 Σ 574 554 2.26      

Unscaled Zero Point Vibrational Energy (zpe) 287.2 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 277.1 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 B3LYP/3-21G
B
0.25485

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
I1 0.000 0.000 0.290
F2 0.000 0.000 -1.710

Atom - Atom Distances (Å)
  I1 F2
I12.0007
F22.0007

picture of Iodine monofluoride state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 I 0.346      
2 F -0.346      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 1.934 1.934
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.797 0.000 0.000
y 0.000 -32.797 0.000
z 0.000 0.000 -32.495
Traceless
 xyz
x -0.151 0.000 0.000
y 0.000 -0.151 0.000
z 0.000 0.000 0.302
Polar
3z2-r20.605
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.023 0.000 0.000
y 0.000 1.023 0.000
z 0.000 0.000 3.734


<r2> (average value of r2) Å2
<r2> 51.218
(<r2>)1/2 7.157