# Lewis dot structures of phosgene COCl_{2}

A simple procedure for writing Lewis Dot Structures** **was given in a previous post 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).

Let us consider the case of the **Lewis dot structures of phosgene COCl _{2}.**

__Step 1__: The central atom will be the C atom since it is the less electronegative. Connect the atoms with single bonds:

__Step 2__: Calculate the # of electrons in π bonds (pi bonds, multiple bonds) using formula (1) in the article entitled **“Lewis Structures and the Octet Rule”**. Where n in this case is 4 since COCl_{2} consists of four atoms.

Where V = (4 + 6 + 7 + 7) = 24

Therefore, P = 6n + 2 – V = 6 * 4 + 2 – 24 = 2 **There are 2 ****π electrons (pi electrons) in** **COCl _{2}** and so 1 double bond must be added to the structure of Step 1.

__Step 3 & 4__: One double bond must therefore be placed to the structure in Step 1. Therefore, the **dot resonance structures of COCl_{2}** (

**Lewis structures of**) are

**COCl**_{2}**as follows:**

**Lewis dot structure** #2 is the **more probable (most stable) since **there is no charge separation.

__Relevant Posts__

Lewis Structures and the Octet Rule - A simple method to write Lewis Structures

Simple Method for writing the Lewis Structures of carbon disulfide CS_{2}

__References__

- G.N. Lewis, J.A.C.S, 38, 762-785, (1916)
- E. C. McGoran, J. Chem. Educ., 68, 19-23 (1991)
- A.B.P. Lever, J. Chem. Educ., 49, 819-821, (1972)

__Key Terms__

** simple method for drawing Lewis structures**,

__Lewis structures of COCl___{2},**,**

__Lewis electron dot structures of COCl___{2}**,**

__dot structures of COCl___{2}

Unfortunately the charges on the Cl is wrong. The + charge should be on the Cl with double bond

ReplyDeleteYou are quite right! Thank you!!!

Deletewait so should we or should we not draw the resonance structures when drawing the final lewis structure of COCl2

ReplyDelete