Chlorite or chlorite ion or chlorine dioxide anion is made up of one chlorine and also two oxygen atom v a negative charge having actually the chemistry formula ClO2-. It is likewise known together salts that chlorous acid. Chlorite is one of the the strongest oxidizers of chlorine oxyanions.

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In this article, we will study Chlorite ion(ClO2-) lewis structure, molecule geometry, hybridization, polar or nonpolar, link angle, etc.

Chlorite has a +3 oxidation state and also is part of the chlorine oxides family. Chlorite is provided in the paper, pulp, and also bleaching that textiles. 

Properties of Chlorite ion

It has a molar fixed of 67.452 g.The conjugate mountain of chlorite ion is chlorous acid.It is a solid oxidizer.It is a salt that chlorous acid.
Name the MoleculeChlorite ion
Chemical formulaClO2-
Molecular geometry that ClO2-Bent or V-shaped
Electron geometry that ClO2-Tetrahedral
Bond angleLess than 109.5º
Total Valence electron for ClO2-20

Page Contents show
1 exactly how to draw lewis structure for ClO2-(Chlorite)
2 monitor some procedures for illustration the lewis dot structure of ClO2-
3 What is the molecule geometry of ClO2-?
4 Hybridization of ClO2-
5 The bond angle of ClO2-
6 Chlorite ion polarity: is ClO2- polar or nonpolar?
8 an introduction

How to attract lewis framework for ClO2-(Chlorite)

ClO2- lewis structure contains one solitary bond and also one double bond. Two lone pairs current on the central atom of the ClO2- Lewis structure. Lewis diagram is a depiction of the valence electron within a molecule.

To draw the lewis diagram of any type of molecule, we need to follow 5 or 6 straightforward steps relying on the intricacy of the molecule.

Here’s in this article, us will attract the ClO2- lewis structure with some simple steps including all explanations.

Follow some procedures for illustration the lewis dot framework of ClO2-

1. Count total valence electron in ClO2-

Counting valence electrons is always the an initial step we need to follow for drawing the lewis diagram of any molecule. To count the valence electron of a molecule, just watch the routine group variety of an atom.

In the case of the ClO2- molecule, chlorine belongs come the 17th routine group and oxygen 16th. Hence, the valence electron because that chlorine is 7 and for oxygen, that is 6.

⇒ Total number of the valence electron in chlorine = 7

⇒ Total variety of the valence electron in oxygen = 6

∴ Total number of valence electron easily accessible for illustration the lewis structure of ClO2- = 7 + 6(2) + 1 = 20 valence electrons  <∴two oxygen atoms, one chlorine and one negative charge the count together a one valence electron>


2. Find the least electronegative atom and also placed it in ~ center

Now we have to uncover the external and main atom the the ClO2- molecule. Generally, much less electronegative hold the place of the main atom, and also the rest are spread evenly roughly it.

So, native chlorine and oxygen, chlorine(3.16) is much less electronegative than oxygen(3.44). Hence, placed the chlorine in ~ the center, and oxygen atoms spread roughly it.


3. Attach outer atom to main atom through a solitary bond

Here’s in this step, us will connect outer atoms(oxygen) come the central atom(chlorine) with the assist of a single bond because that further illustration the lewis framework of ClO2-. Just place one-one single bonds between oxygen and also chlorine atom.


After connecting the external atom to the central atom, counting the number of valence electron we provided till now for do the over structure. A solitary bond created from two-electron and in the above structure, we offered two single bonds.

Hence, 4 valence electrons we have actually used in the above structure from the 20 accessible valence electron for drawing the ClO2- Lewis structure.

(20 – 4) = 16

We have left with 16 valence electrons more.

4. Ar remaining valence electrons beginning from outer atom first

It’s time to complete the octet that the outer atom first. “The octet rule describes the tendency of atom to choose to have eight electrons in the valence shell”.

So, start placing the remaining valence electron on the outer atom(oxygen) and complete your octet first.


So, we placed the 6 valence electron on every oxygen, as oxygen currently shares two-electron through the assist of a solitary bond. Each oxygen in the above structure shares 8 electrons, therefore completed their octet comfortably.

As we had a total of 16 valence electrons and also in the above structure, we offered 12 much more electrons.

(16 – 12) = 4 valence electrons

Now we room still left v 4 an ext valence electrons.

5. Complete central atom octet and make covalent link if necessary

In ClO2- molecule, chlorine is the main atom and also it requirements 8 electrons around to complete the octet. Together you see in the structure of the 4th step, chlorine currently sharing 4 electrons v the help of two single bonds linked to oxygen atoms.

So, simply put the 4 leftover valence electrons on chlorine and also complete that is octet.


By looking at the over structure, we view both atoms(oxygen and chlorine) in ClO2- molecule completed their octet comfortably and we offered all our 20 full valence electrons accessible for drawing the ClO2- Lewis structure.

But us don’t understand if the above ClO2- Lewis framework is secure or not, so us can’t i think the over structure, as the best and stable lewis framework of ClO2-.

For check the stability of the lewis diagram, we will certainly go through the ide of a formal charge.

6. Inspect the stability with the assist of a formal fee concept

“A formal fee is a charge assigned come an atom in a molecule, assuming that electrons in all chemical binding are common equally between atoms.”

The framework with the formal fee close come zero or zero is the best and also stable lewis structure.

We will certainly calculate the formal charge on the 5th step structure.

⇒ official charge = (valence electron – lone pair electron – 1/2bonded pair electrons)

For chlorine atom – 

⇒ Valence electron that chlorine = 7

⇒ Lone pair electrons on chlorine = 4

⇒ bonded pair electrons around chlorine = 4

F.C. On chlorine atom = (7 – 4 – 4/2) = +1

For oxygen atom –

⇒ Valence electron the oxygen = 6

⇒ Lone pair electrons on oxygen = 6

⇒ bonded pair electrons roughly oxygen = 2

F.C. On oxygen atom = (6 – 6 – 2/2) = -1


The over structure is not lot stable, as the lewis structure is the most stable once the formal fee on each atom and an in its entirety formal fee of the molecule is close to zero or zero.

Let’s execute some twists on the over structure to obtain the formal charge close to zero.

As we know, chlorine have the right to hold much more than 8 electrons due to the fact that it has d orbital because that extra electrons necessary for bonding. 

So, simply take one lone pair native one oxygen atom, transform it come a covalent bond, and also forms a Cl=O bond.


Now again identify the formal charge on the brand-new ClO2- Lewis structure.

For chlorine atom –

⇒ Valence electron that chlorine = 7

⇒ Lone pair electron on chlorine = 4

⇒ external inspection pair electrons about chlorine = 6

F.C. On chlorine atom = (7 – 4 – 6/2) = 0

For oxygen atom(left side) –

⇒ Valence electron of oxygen = 6

⇒ Lone pair electron on oxygen = 4

⇒ bonded pair electrons approximately oxygen = 4

F.C. On oxygen atom = (6 – 4 – 4/2) = 0

For oxygen(right side) –

⇒ Valence electron = 6

⇒ Lone pair electrons on oxygen = 6

⇒ bonded pair electrons approximately oxygen = 2

F.C. Top top oxygen atom = (6 – 6 – 2/2) = -1

∴ We acquire (-1) overall formal charge on the brand-new ClO2- lewis structure and also two atoms have zero formal charges, hence, this lewis structure of ClO2- is secure and far better than the vault structure(5th action structure).


This is the best and also stable lewis dot structure of ClO2- as it consists of the minimum officially charge, also, dues on chlorine and also one oxygen is zero.

ClO2- molecule has a negative charge also, so, we put -1 outside the clip in the over structure. Also, Chlorite ions deserve to exist in many resonant states because of the shifting of bonds.

What is the molecular geometry of ClO2-?

“Molecular geometry is the three-dimensional arrangement of atom in a molecule”. The molecule geometry the ClO2- is bending or V-shaped. 

According come the lewis structure of ClO2-, chlorine is the main atom that has 2 lone pairs on it, these lone bag occupy an ext space than bond pair electron and try to repel each other. Together a result, bonded pair around the oxygen atom pushes apart, this reasons oxygen atom is relocated closer together.


Therefore, the resultant molecular geometry that ClO2- shows up like a bent or V-shaped.

Let’s see how to find the molecule geometry that ClO2- making use of the AXN an approach and VSEPR theory.


That’s how the AXN notation complies with as presented in the above picture.

AXN notation because that ClO2- molecule:

A to represent the main atom, so as per the ClO2- lewis structure, chlorine is the main atom. A = ChlorineX to represent the external inspection atoms, together we know, chlorine is enclosed to 2 oxygen atoms. Therefore, X = 2N represents the lone pair, the chlorine atom has actually two lone bag on it. Hence, N = 2

So, the AXN formula because that the ClO2- molecule becomes AX2N2.

According to the VSEPR theory, if a molecule central atom is attached through two bonded atoms and has two lone pairs then the molecule geometry of the molecule is V-shaped or bent.

Hence, the molecular shape or geometry for ClO2- is bent.


ClO2- molecule geometry

The electron geometry because that ClO2- is tetrahedral.


Hybridization the ClO2-

To uncover the hybridization of one atom, we have actually to very first determine its hybridization number.

“Hybridization number is the enhancement of a total number of bonded atoms approximately a central atom and the lone pair present on it.”

∴ Hybridization variety of ClO2- = (Number that bonded atom attached come chlorine + Lone pair ~ above chlorine)

According to the lewis framework of ClO2-, we have actually two external inspection atoms(oxygen) attached to the chlorine and two lone pair present on it.

∴ Hybridization number of ClO2- = (2 + 2) = 4

Hybridization numberHybridization

So, because that a hybridization variety of four, we get the Sp3 hybridization ~ above the chlorine atom in the ClO2- molecule.

The bond angle of ClO2-

“A bond edge is the geometrical angle between two adjacent bonds”.

The bond edge of ClO2- is less than 109° because of the presence of two lone bag on chlorine atoms as these lone pairs repel every other and also that pushes bonded atoms closer together, hence causes the lower bond angle.


Definitely ClO2- is polar in nature as it lacks symmetry because it has a molecular geometry that bent, which method dipole generated in addition to Cl-O bond unable to canceled the end each other providing some dipole minute in the molecule.

The lone pair presence on chlorine reasons an unsymmetrical charge circulation in the molecule, therefore the induced fees on the Cl-O bond execute not cancel each various other completely.

Also, the existence of a an adverse charge over the atoms renders the Cl-O bond polar in nature.

Hence, all these components lead come ClO2- a polar molecule in nature.


Why walk the chlorine in ClO2- lewis structure, consists of electrons of much more than 8 and violate the octet rule?

Whenever the d-orbitals and also beyond come it, participate in bonding with various other atoms then an expanded octet is produced.

Chlorine atom in ClO2- lewis structure broadened the octet since it has d-orbitals in the third principal energy level, hence, it has extra orbital(d-orbital) for additional electron needed for bonding.

Sulfur, phosphorous, and silicon room some other instances that can broaden their octet and also hold electrons more than 8.

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Why walk the molecule geometry of ClO2- appears bent in shape?

This is due to the fact that of the existence of 2 lone bag on chlorine central atom that pushes both oxygen atoms closer together, this reasons a lower O-Cl-O shortcut angle, hence, that shape appears as bent prefer structure.


The complete valence electron available for the Chlorite (ClO2-) lewis structure is 20.The hybridization that chlorine in the ClO2- the molecule is Sp3.ClO2- is a polar molecule as result of the asymmetrical circulation of charges brought about by the presence of lone pair electrons.The as whole formal fee in ClO2- is -1.The bond edge in ClO2- is slightly less than 109°.The molecular geometry the ClO2- is V-shaped and electron geometry is tetrahedral.Total number of 7 lone pairs and also 3 shortcut pairs existing in the lewis dot framework of ClO2-