However above structure is still unstable because octal is not still completed in carbon atom. Therefore, above structure is notĪnd need to convert a lone pair on oxygen atoms to a bond as below. Also octal is not completed in carbon atom. Marking of charges on atoms is a compulsory step to decide the stability of a molecule.Ĭheck the stability and minimize charges on atoms by converting lone pairs to bondsīecause, there are charges on carbon and oxygen atoms. There are charges on carbon and oxygen atoms to mark in the above structure. Now, one valence electron pair is remaining and it is marked on carbon atom.Because, there is no center atom, we can start to mark remaining lone pairs on oxygen atom.So, there are four remaining lone pairs to mark on carbon and oxygen atoms. There is already one bond in the drawn sketch.Remember that, there should be total of five electron pairs as lone pairs and bonds. Therefore, just draw a single bond betweenĪfter determining the center atom and sketch of CO molecule, we can start to mark lone pairs on atoms. In carbon monoxide molecule, we do not need to worry much about center atom selection. For,ĬO molecule, Total pairs of electrons are five in their valence shells.Ĭenter atom selection in lewis structure drawing can be a long process if a molecule is complex. Total electron pairs are determined by dividing the number total valence electrons by two. Pairs = σ bonds + π bonds + lone pairs at valence shells valence electrons given by oxygen atoms = 6 * 1 = 6.
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