IF5 is crucial molecule in the floor of chemistry. Questions around the molecule have actually been inquiry in various exams. Several of the common questions that are asked incorporate – exactly how is the formed? Is this molecule stable? are there any type of uses of this compound? attract the shape of this molecule etc. There are a the majority of facts the make the an exemption in many cases.

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I am right here to talk about all those facts and also to teach friend all that is over there to know about this molecule consisting of its structure, hybridization, shape, etc.

I hope by the finish of this article, you will certainly be well versed come answer any kind of question about IF5 the comes your way!

IF5 (Iodine pentafluoride) is a colorless liquid, though part impure samples may appear yellowish. The was discovered in 1891 through Henri Moissan by burn solid Iodine in fluorine gas. The reaction is as follows:

I2 + 5F2 ——> 2IF5

It is an interhalogen compound the is supplied as a fluorination reagent in necessary synthesis. Iodine pentafluoride (IF5) is generally utilized in the production of alkyl iodides include fluoride, i beg your pardon act as an intermediary in the synthesis of perfluoro-organic mixtures.

These space then utilized to produce water and oil repellent emulsions because that the therapy of textiles and for fire extinguishing froths.

The molar fixed of IF5 is 221.89 g/mol and also its density is 3.250 g/cm3.

Boiling Point- 97.85 °C

Melting Point- 9.43 °C

IF5 Lewis Structure

Before we start making the Lewis framework for IF5, there are a couple of things to keep in mind.

A Lewis framework basically to represent the number of valence electron of an atom.

The easiest method to determine the variety of valence electron of an atom is by count the number of columns of a periodic table left to appropriate excluding the transition elements.

For example, Carbon (C) has actually 4 valence electrons, if Fluorine (F) has actually 7 valence electrons.

The only exception, in this case, is Helium (He) which has actually 2 valence electrons. Atoms try to accomplish stability through the octet dominance i.e every atom should have 8 electrons around it.

In lewis diagrams, valence electrons are stood for by dots. So as soon as we draw the Lewis diagram because that the Cl atom we draw 7 dots around it.

Now we move on to the actions of illustration a Lewis diagram:-

1. The first step is to count all the valence electron of every molecule.

In the instance of IF5,

The Iodine atom has 7 valence electrons. F likewise has 7 valence electrons. But since there are 5 atoms of F, us multiply 7×5= 35 valence electrons.

Adding both we get 35+7= 42.

Hence, a total variety of valence electron of IF5= 42.

2. Determining the central atom.

A central atom is usually the one to which every atom is bound to. There is typically only among it in a molecule. In the case of IF5, ns (Iodine) is the main atom.

3. Draw single bonds come the main atom. A solitary bond represents 2 electrons being shared.

4. Put all the remaining valence electron on the atoms as lone bag (2 dots).

5. Turn the lone pairs into a double or a triple shortcut so that each atom has actually its complete octet.

As a last resort, examine the formal charge of every atom. It need to be the lowest feasible and deserve to be calculated by the formula provided below.


Now in the case of IF5, we deserve to see the I no only had completed that octet yet had exceeded it through 2 electrons. We will pertained to that component in a bit.

Now we arrange the remaining valence electrons about all the atom to finish their octet. After ~ this, us observe that we still have 2 valence electron remaining.

We place these top top the central atom I as lone pairs. Therefore we have completed the Lewis structure of IF5. Now notice that the Iodine atom has 12 valence electrons roughly it.

This is an exemption to the rule of octet well-known as broadened octet’s dominance which says that main atoms the are found in the third period or below which room bound to very electronegative terminal atoms (F) have the right to have an increased octet containing up to 12 valence electrons.

Hence I can hold approximately 12 valence electrons. Currently if you examine the formal fee of each atom that comes the end to be 0, i m sorry is the lowest worth possible.

Thus the Lewis structure of any kind of compound have the right to be created using these simple steps!


IF5 Hybridization


The Hybridization of IF5 is Sp3d2

The hybridization that a molecule can be understood in two ways:-

The Theoretical component – The main atom Iodine atom has actually 7 valence electrons. Its electronic configuration in the soil state is –

I = 5s2, 5p5, 5d10

All the 7 valence electron are distributed in the s and also p orbitals.

Now in that excited state, because I has to form 5 bonds through F, two valence electron from the p orbital jump (promoted) to the d orbital thus making 5 bonds v F and also the electrons staying in the s orbit acting as lone pair(non-bonding), hence making every electrons hybridized.

Hence the Hybridization is determined by counting the number of bonds made and the lone pair.

This consists of the lone pair in the s orbital, 3 sigma binding in the ns orbital, and also 2 sigma binding in the ns orbital making it Sp3d2 hybridized.

The formula to discover the Hybridization is together follows:-

H= 1/2

H= HybridizationV= variety of Valence electronsC= fee on cation or an ext electropositive element.A= fee on anion or an ext electronegative element.

Now if H =2, climate it mirrors Sp hybridization.

H= 3, it to represent Sp2 hybridization.

H= 4, that will present Sp3 hybridization

H=5 method it isSp3d hybridized.

H=6, the molecule will have Sp3d2 hybridization.

In the situation of IF5,

V = 7 (valence electrons of main atom)

M= 5 (5 monovalent atoms of F)

Since the full charge the IF5 is 0, C and A will certainly be zero.



H=6, indicating that its Sp3d2 hybridized. Hence, we have the right to easily uncover the hybridization the IF5 utilizing these two methods.

IF5 molecular Geometry

The molecule geometry the IF5 is Square Pyramidal. The bond angles created are close to 90°.

The molecular geometry that IF5 can be established using the VSEPR theory. Given listed below is the chart of VSEPR.


From the chart it is clear the IF5 is AX5E, whereby A to represent the variety of the central atoms, X represents the numbers of atoms bonded come the central atom (5) and E to represent the non-bonding electrons (lone pair).

Hence its molecular shape is square Pyramidal and also electron geometry is Octahedral.

Molecular form depicts only the atom when illustration the form whereas electron geometry depicts every electron pairs together well, hence making the octahedral.

If we deeply check, then we will notification that due to the existence of lone pair, the form of IF5 is little bent square pyramidal as shown in the listed below image.


IF5 Polarity

IF5 is a Polar Molecule.

Polarity occurs once there is a difference in the electronegativity the the 2 bonded atoms that induces an electric dipole moment.

This deserve to be seen as soon as we take a look in ~ its molecular Geometry. IF5 has a bend square Pyramidal shape due to the fact that of lone pair and bond pair repulsion.

Notice the the 4 bonds of IF5 publication each various other out, however there is still one bond remaining.

Due come Fluorine being an ext electronegative than I, a dipole minute is induced for this reason making IF5 a polar molecule.

For more detailed information, you have the right to refer come IF5 Polarity.

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As ns had proclaimed in the beginning, come answer any question related to IF5, we must know around its Lewis Structure, Hybridisation, Polarity, and also Molecular Shape. All of these topics have actually been disputed in a simple and concise manner.

Now, you must feel confident about answering any kind of questions around IF5 that come your way!

I hope all her queries have been answered and if you have any doubts concerning any the the over concepts, feel cost-free to ask me. Happy Learning!