ClO2- Lewis structure, characteristics: 11 Facts you should know

ClO2 Lewis structure is a relevant factor to identify the facts about ClO2. The process of electronic reaction between the composite elements identifies several properties of the compound. Lewis structure explains those process and the relevant facts. The facts are:

ClO2- Lewis structure Drawing

The Lewis stricture of any compound is nocked to start with putting dots as the notation of valence electron around the elements that potentially participates in the formation of a compound.

Calculating the number of valence electron in ClO2 is the first step to initiate sketching of the Lewis structure of the compound. The effective factor to practically implement the structure is the identification of centre atom of the compound, which depends on the electronegativity, and size of the elements.

In ClO2 Oxygen is found as the smaller and less electronegative element. Therefore, Chlorine considered as the centre atom and two oxygen atom is put by surround chlorine atom the compound.

Calculating the number of bond pairs and lone pairs, I the compound end the fundamental sketch of Lewis structure of the Chlorite ion.

ClO2- Lewis structure resonance

Resonating structures take place in presence of one or more than one pi bonds. Resonance is the process of interchange of places between the single electron present in the compound that is the negative charge and the pi bonds.

Resonance in ClO2 from Wikipedia

Chlorite in is found to hold one single electron on Oxygen. That single electron has the tendency of making a pi bond by breaking the pi bond between the chlorine atom and another oxygen atom. In this way, ClO2 generates two similar resonating structures by keeping the chemical formal intact.

ClO2- Lewis structure shape

The shape of the compounds can be obtained after completing the drawing of Lewis structure by putting the bind pairs and lone pairs in the stricture.

The shape of ClO2 is recognised as angular shape with two bond pairs and two lone pairs. The angular shape come out as the bond-pair-bond pair and bond pair- Lone pair repulsion take place in the compound.

clo2- lewis structure
ClO2- Lewis structure from Wikipedia

VSEPR Theory is reliable to describe this fact of effective influence of bond pairs and lone pair repulsion on the shape of the compounds. The effect of this kind of repulsion gives bent structure to Chlorite ion instead of giving linear geometric shape.

ClO2- Lewis structure formal charge

The calculation of formal charges of the compound is an easy process to identify the overall charge held by the compounds. There is the specific formula followed to calculate the formula of individual components of a compound.

The formula is valence electron – (number of nonbonding electrons – (number of bond pairs/2))

Formal charge of Chlorine in ClO2 is (7 – 4 – (6/2)) = 0. The oxygen atoms hold formal charge of 0 as well where one Oxygen atom possesses a free electron which makes the overall compound negatively charged anion. 

ClO2- Lewis structure angle

The bon angle of the compound are determined from the Lewis structure as this structure is reliable in representing the shape of the compounds.

The bong angle of Chlorite ion is 111°. According to VSEPR theory, the bond angle of the compound should be less than 109° as there is a huge lone pair lone pair repulsion works on Chlorine, the centre atom.

ClO2- Lewis structure octet rule

Octet rule has been established in chemistry to make a miserable approach for the process of electron share adopted by the periodic elements.  According to octet rule, the elements always want to fulfil their octet state that is the adoption of stable electronic configuration by filling their last energy level or last electronic shell.

The elements want to adopt the similar electronic configuration like their nearest noble gas elements as those elements have followed octet state.

In ClO2, it has been identified that Chlorine has deficiency of one electron to reach octet and Oxygen have deficiency of two electrons. By sharing few of valence electrons with each other, the elements meet the octet rule that is specifically denoted by Lewis structure of the compound.

ClO2- Lewis structure lone pairs

The number of lone pairs is easily identified by sketching the Lewis structure of the compounds. As this structure rectifies the number of valence electrons and lone pairs  in the compound by using dots.

The number of lone pairs in Chlorine of ClO2 is two.  This lone pairs has strong effect on the bent shape and bond angle of the compound.

ClO2- valence electrons

Identification of the total number of valence electron in the participated elements in electron sharing process is the fundamental need of drawing a Lewis structure of a specific compound. In the Lewis structure of the compounds, the Valence electrons are denoted by dots.

The number of valence electron in Chlorine is 7 and in Oxygen is 6. Two Oxygen atom participates in the formation of ClO2 therefore, the total of number of valence electron in ClO2 is (7+ (2*6)) = 21.

ClO2 Hybridisation

Hybridization is an important fact about any compound which is identified by illustrating the internal components of the formation of the compounds. Hybridisation helps to obtain the features managed by the centre atom of compound while sharing its valence electrons with other elements.

The hybridisation of Chlorine dioxide is s[p2 and its ion that is Chlorite is sp3.

The hybridisation of ClO2 has been found as Sp3. This represents internal fact in the electronic arrangement of the compound that expresses after sharing the electrons Chlorine gets one electron migrated from its s orbital to the vacant place of p orbital. The overlapping of this electron with the electronic arrangement of Oxygen atoms gives rose to the compound ClO2. 

ClO2- solubility

Solubility is one of chemical property of the compounds that is effective in expressing the effect of physical structure of the compound. the solubility of the compounds depends on the internal compact structure of the compounds.

Solubility of Chlorine dioxide is 8 g/L (at 20 °C) in water. Besides, the compound is soluble in alkaline solutions and in Hydrochloric acid.

ClO2- ionic or Covalent

Complete transfer of electron from metal to non-metal that is these compounds are made of metal and non-metals forms ionic compounds. Covalent compounds can be formed with any two elements of periodic table through the process electron sharing. Here, the elements share their electrons with each other partially.

ClO2 ion is covalent as here the electrons of Chlorine are shared with oxygen and similarly oxygen atoms share its electrons with Chlorine to make ach other able in maintaining octet.

ClO2- acidic or basic

According to scientist Lewis, the electron donators in a compound are called Lewis Acid and the acceptors are called Lewis base in the chemistry.

ClO2 is a neutral compound as here no atom donates its electrons or accept the same from any atom. Therefore, there is no Lewis acid and Lewis base in ClO2.

ClO2- polar or nonpolar

Polarity depends on the shape, electronegativity difference between centre atom and other atoms and the presence of lone pairs in the compound.

Though the difference between the electronegativity of the atoms of ClO2 is less than 0.4, ClO2 is a polar compound and its dipole moment is 1.792 Debye.


This article has described the facts about Chlorite ion hold in chemistry as a model of Lewis compound. ClO2 Lewis structure has been identified as an informative features for this article where the drawing of Lewis structure of ClO2 has revealed the facts in an effective manner.            

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