ClO2 is the molecule formula of Chlorine dioxide the is generally used come treat safe and clean water. The is far better than chlorine since it has higher solubility in water and does not hydrolyze unequal chlorine, and resides as liquified gas.

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In ionic kind chlorine dioxide is well-known as chlorite with the molecule formula (ClO2-). The is clear from the chemical formula that chlorine dioxide or chlorite is a solid oxidizing agent.

Chlorine dioxide has tendency to get lessened and provide oxygen to various substrates during an oxidation-reduction or redox reaction.

From this, it can be construed that chlorine dioxide in one ionic state will certainly be a strong oxidizer the chlorine oxyanions.

Recently, this compound remained in limelight because of a fraudulent insurance claim to cure coronavirus.

Let us research this compound in more detail.

Lewis framework of Chlorine Dioxide (ClO2-)

The Lewis framework is a photographic representation of valence electrons taking component in the formation of binding to create a new molecule with new properties altogether.

To start drawing the Lewis structure of Chlorine dioxide, first, the is essential to draw one for the participating elements.

For Chlorine,

Atomic number = 17

Electronic configuration = 1s2 2s2 2p6 3s2 3p5

Valence electrons = 7

For Oxygen,

Atomic number = 8

Electronic configuration = 1s2 2s2 2p4

Valence electrons = 6


Now, it will certainly be simpler to draw the Lewis framework of chlorine dioxide together we recognize that there room 20 valence electrons in one chlorine dioxide molecule.

It can confuse many human being as ClO2 comprises 19 valence electron only.

Here, it is critical to know that chlorine dioxide is a solid anion and also oxidizing agent.

This occurs from the reality that chlorine dioxide is an turbulent molecule and also mainly exists together ClO2- throughout bond formation. Due to this, the valence electrons in chlorine dioxide or chlorite are 20.

We will attract the Lewis framework of chlorine dioxide through 20 valence electrons.

Let us follow some steps to draw the Lewis structure of chlorine dioxide:

Step 1: Find the full valence electron in one molecule of chlorine dioxide.

It is 20 as chlorine has 7 valence electrons and also oxygen has actually 6 valence electrons.

There space two oxygen molecule in chlorine dioxide for this reason the total is 19.

But chlorine dioxide exists as ClO2- during the development of a bond, therefore we have actually one more valence electron available.

So, the total variety of valence electrons easily accessible in one chlorine dioxide or chlorite molecule is 20.

Step 2: Find the valence electrons additional needed to stabilize the molecule.

By the octet rule, each aspect needs eight valence electrons to complete its digital configuration.

Here, an anomaly exists v the chlorine atom as it have the right to increase its octet to accommodate an ext valence electrons. That is a standard example of chemistry being full of exceptions!

Chlorine belongs to the third group in the routine table. The 3rd group has actually the ability to increase its octet and also accommodate much more valence electron to accomplish a stable molecular structure.

Hence, through no anomaly, the total valence electrons forced by one chlorine dioxide would have been 24 i m sorry is now 26 with the anomaly of broadened octet in chlorine atom.

Step 3: Draw the skeleton that chlorine dioxide.


The aforementioned diagram is among the lewis structures of chlorine dioxide but, we need to check its security with the assist of formal fee distribution.

The factor for the exact same is each molecule wants to accomplish a secure structure that have the right to be acquired only v zero formal charge distribution.

Now we should calculate the official charge distribution on chlorine dioxide molecule:

Formal fee = Valence electron – Non-Bonding electrons – ½ Bonding Electrons

For Chlorine,

Formal charge = 7 – 4 – 4/2 = +1

For Oxygen,

Formal fee = 6 – 6 – 2/2 = -1

Here +1 formal charge of the chlorine atom cancels the end the -1 formal charge of one of the oxygen atoms.

With this, -1 formal fee still remains on one more oxygen atom.

Therefore the above structure is unstable because there exists one more Lewis framework where the formal circulation of some participating atom is zero.

Let us inspect the exactly lewis framework of the ClO2- molecule together below.


Let us uncover the formal charge distribution of the above-mentioned molecule.

Formal charge = Valence electrons – Non-Bonding electrons – ½ Bonding Electrons

For Chlorine,

Formal charge = 7 – 4 – 6/2 = 0

For Oxygen,

Formal charge = 6 – 6 – 2/2 = -1

For Oxygen,

Formal fee = 6 – 4 – 4/2 = 0

This structure is more suitable together the formal charge distribution on 2 atoms is zero.

Studying the officially charge distribution in detail likewise gives us the factor behind the double bond forming between one oxygen and chlorine atom.

Step 4: Find the kind of link formation occurring in one chlorine oxide.

One solitary bond is formed between chlorine and also oxygen atoms and also a dual bond is formed between chlorine and another oxygen atom.

The explanation because that the exact same lies in the formal charge circulation that compels the formation of a double bond and also a single bond.

Even though the new structure is stable, the is the oxygen atom that normally undergoes bond formation with another nearby atom.

Step 5: Find the main atom.

Chlorine is the main atom due to the fact that it is existing as the solitary entity in ~ the chlorine dioxide molecule.

Moreover, the atom v the shortest electronegativity worth becomes the main atom together it needs to make the maximum variety of bonds.

As a result, chlorine i do not care the central atom.

Molecular Geometry the Chlorine Dioxide


From the Lewis structure, it is clear the chlorine dioxide or chlorite ion is a triatomic molecule the is bending in shape.

It is bent because of the lone pairs of valence electrons on the chlorine atom and the uneven bond kind between every chlorine and also oxygen atom.

This can be studied in the information with the help of the Valence covering Electron Pair Repulsion (VSEPR) concept or the AXN method.

According to this theory, the existence of 2 lone pairs of valence electron on the chlorine atom exerts force and bends the structure offering the bond edge slightly lesser 보다 109°.

We understand that a single bond consists of only one sigma shortcut whereas the twin consists the one sigma and also one pi bond.

Irrespective the the sigma bond thought about as the strongest type of bond, the oxygen atom attached come chlorine v a single bond (sigma bond) just bonds with adjacent atoms. The is since the dual bond formed in between chlorine and also oxygen atom is stable and takes a lot of of power to with the excited state.

Here, that is essential to recognize that the valence electron existing as the (-) sign on the oxygen atom is responsible because that the bond formation due to the fact that it is unstable and needs more valence electrons to achieve a secure configuration.

From the AXN method, the is clear the the share formula the chlorine dioxide is AX2N2 together the main atom has actually two bonded atoms and also two lone pairs of valence electrons.

Hence the molecular geometry of chlorine dioxide is bent and electron geometry is tetrahedral.

Moreover, it can interest friend that through the AXN method, we can determine the hybridization that the central atom i beg your pardon is Sp3 in chlorine dioxide.

Hybridization in Chlorine Dioxide (ClO2)


From the AXN method, the is clear that the hybridization that chlorine is sp3.

Here the is essential to know that in the situation of one more Lewis structure where chlorine and also both oxygen atoms space forming dual bonds, the hybridization that the chlorine atom will be sp2.

Such a Lewis framework is not a normal case since chlorine dioxide is current in ClO2- form.

In the case of the chlorite ion, mixing and inter-mixing the one 2s and three 2p orbitals takes location to form four brand-new hybrid orbitals of similar energy.

For the sigma bond, head-on overlapping takes location whereas, because that the pi bond, lateral overlapping bring away place.

Sigma bond is an ext stable 보다 the pi bond because it experience head-on overlapping which is lot stronger 보다 lateral overlapping that pi bond.

Polarity in Chlorine Dioxide (ClO2)

Chlorine dioxide is a polar molecule because it is a strong anion and also exists in the ionic form.

It is important to know that the dominance of electronegativity difference will not be applicable in this case.

Although the electronegativity difference between oxygen and chlorine atom is less than 0.4, chlorine dioxide is a polar molecule i beg your pardon is as result of the fact that it is a strong anion.

Let us also check the end its properties and also uses.

Properties that Chlorine Dioxide (ClO2)

Molecule NameChlorine dioxide
Chemical FormulaClO2
Molecular GeometryBent
Electron GeometryTetrahedral
Bond Angle°
Available Valence Electrons20

Uses the Chlorine Dioxide

1. It is used throughout food processing to keep it for a much longer duration.

2. That is provided to eradicate molds.

3. The is offered to regulate odor.

4. That is offered by healthcare professionals throughout various dental applications.

5. It is supplied as a disinfectant for vehicles, floor, air, swim pool.

6. That is provided to clean wounds.

7. The is a strong bleaching agent.


1. Chlorine dioxide is a strong anion and mainly exists together chlorite in the ionic form.

2. The molecule geometry that chlorine dioxide is bent and the bond edge is slightly less than 109 degrees.

3. The hybridization the chlorine dioxide is sp2 and also its ion is sp3.

4. The hybridization can further be studied in detail with the assist of a molecular orbit diagram.

5. The formal charge circulation on chlorine dioxide is -1.

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6. The hybridization can be learned in the information with the aid of Valence Bond concept (VBT).