Question

Phosgene (cl2co) is a poisonous gas that was used as a chemical weapon during world war i, and it is a potential agent for chemical terrorism. draw the lewis structure of phosgene. include all three resonance forms by alternating the double bond among the three terminal atoms. draw molecules by placing atoms on the grid and connecting them with bonds. include all nonbonding electrons.

Answer 1

phosgene is COCl2. The double bond can resonate as shown in pic. The first one is the lewis structure for phosgene.

Answer 2

Answer :  The Lewis-dot structure and resonance structure of $COCl_2$ is shown below.

Explanation :

Resonance structure : Resonance structure is an alternating method or way of drawing a Lewis-dot structure for a compound.

Resonance structure is defined as any of two or more possible structures of the compound. These structures have the identical geometry but have different arrangements of the paired electrons. Thus, we can say that the resonating structure are just the way of representing the same molecule.

Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.

In the Lewis-dot structure the valance electrons are shown by 'dot'.

The given molecule is, $COCl_2$

As we know that carbon has '4' valence electrons, oxygen has '6' valence electrons and chlorine has '7' valence electron.

Therefore, the total number of valence electrons in $COCl_2$ = 4 + 6 + 2(7) = 24

According to Lewis-dot structure, there are 8 number of bonding electrons and 16 number of non-bonding electrons.

The Lewis-dot structure and resonance structure of $COCl_2$ is shown below.