# 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!!!

Delete