# Simple method for writing Lewis Dot Structures

# of chlorine dioxide cation (ClO_{2})^{+}

A ** simple procedure for writing Lewis electron dot structures** is given in a previous article entitled “Lewis Structures and the Octet Rule”. Several worked examples relevant to this procedure were given in previous posts please see the ** Sitemap - Table of Contents (Lewis Electron Dot Structures)**.

Another example for writing Lewis structures following the above procedure is given below.

Let us consider the case of the** Lewis dot structures of chlorine dioxide cation (ClO _{2})^{+}**.

How can we draw the** Lewis structures of**** (ClO _{2})^{+}**?

__Step 1__:
Connect the atoms with single bonds. Chlorine is the central atom.

__Step 2__:
Calculate the # of electrons in π
bonds (multiple bonds) using ** formula (1) **in the article entitled “Lewis Structures and the Octet Rule”.

Where n in this case is 3 since (ClO_{2})^{+} consists of three atoms.

Where V = (7 + 6 + 6 ) – 1 = 18

Therefore, P = 6n + 2 – V = 6 * 3 + 2 – 18 = 2

So, there are 2 π electrons (pi electrons) in (ClO_{2})^{+} and the structure in Step 1 has 1 double bond._{ }

**So the structure of Step 1 is the Lewis structure. **

Electrons are placed around each atom so that the octet rule is obeyed. Since Cl is a third row element can accommodate more than 8 electrons.

__Step 3
& 4__: The Lewis** resonance structures** of

**ClO**

_{2}^{+ }_{ }are

**as follows:**

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