Sometimes the decomposition of certain chlorinated compounds release phosgene into the atmosphere. It’s odour seems like the smell of freshly cut hay or grass. It is a gaseous substance with suffocating odour. Phosgene is a toxic compound with no colour.
It is prepared by the reaction of pure carbon monoxide with chlorine gas by using activated carbon as catalyst. Other names are known like carbon oxy chloride, chloro formyl chloride etc. Facts about Phosgene, COCl 2ĬOCl 2 or phosgene is an organic compound which consists chlorine, oxygen and carbon atoms. It is a toxic compound which is used for the synthesis of certain products. Phosgene, COCl 2 is a compound with a carbonyl carbon attached with two chorine atoms. I hope you have completely understood all the above steps.įor more practice and better understanding, you can try other lewis structures listed below.Cocl2 lewis structure, and some important facts are going to be discussed in this article. But here we move the electron pair from the oxygen atom, which gives the more stable structure (having “zero” charges on all the atoms.)) (Note: In step 5, if we had moved the electron pair from the chlorine atom, then there will be +1 and -1 charges on chlorine and oxygen respectively. By doing so, you will get the following lewis structure of COCl2. In the above lewis dot structure of COCl2, you can also represent each bonding electron pair (:) as a single bond (|). This indicates that the above lewis structure of COCl2 is stable and there is no further change in the above structure of COCl2. You can see the number of bonding electrons and nonbonding electrons for each atom of COCl2 molecule in the image given below.įor Carbon (C) atom: Valence electrons = 4 (because carbon is in group 14) Bonding electrons = 8 Nonbonding electrons = 0įor Oxygen (O) atom: Valence electrons = 6 (because oxygen is in group 16) Bonding electrons = 4 Nonbonding electrons = 4įor Chlorine (Cl) atom: Valence electron = 7 (because chlorine is in group 17) Bonding electrons = 2 Nonbonding electrons = 6 Formal chargeįrom the above calculations of formal charge, you can see that the carbon (C) atom, oxygen (O) atom as well as chlorine (Cl) atoms have a “zero” formal charge. In short, now you have to find the formal charge on carbon (C) atom, oxygen (O) atom as well as chlorine (Cl) atoms present in the COCl2 molecule.įor calculating the formal charge, you have to use the following formula įormal charge = Valence electrons – (Bonding electrons)/2 – Nonbonding electrons The stability of lewis structure can be checked by using a concept of formal charge. Now you have come to the final step in which you have to check the stability of lewis structure of COCl2. Step 6: Check the stability of lewis structure Total valence electrons in COCl2 molecule = valence electrons given by 1 carbon atom + valence electrons given by 2 oxygen atoms + valence electrons given by 2 chlorine atoms = 4 + 6 + 7(2) = 24. You can see the 7 valence electrons present in the chlorine atom as shown in the above image. Hence the valence electrons present in chlorine is 7. → Valence electrons given by chlorine atom:Ĭhlorine is group 17 element on the periodic table. You can see the 6 valence electrons present in the oxygen atom as shown in the above image. Hence the valence electrons present in oxygen is 6.
Oxygen is group 16 element on the periodic table. → Valence electrons given by oxygen atom: You can see the 4 valence electrons present in the carbon atom as shown in the above image. Hence the valence electrons present in carbon is 4. → Valence electrons given by carbon atom:Ĭarbon is group 14 element on the periodic table. Total valence electrons in COCl2 molecule Here, I’ll tell you how you can easily find the valence electrons of carbon, oxygen as well as chlorine using a periodic table. (Valence electrons are the electrons that are present in the outermost orbit of any atom.)
In order to find the total valence electrons in a COCl2 molecule, first of all you should know the valence electrons present in carbon atom, oxygen atom as well as chlorine atom. Steps of drawing COCl2 lewis structure Step 1: Find the total valence electrons in COCl2 molecule
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