Phosphoryl iodide is used in the preparation of organophosphorus derivatives and phosphate esters. Select the Lewis structure for POI₃ that minimizes formal charges.

Question

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To minimize formal charges, the Lewis structure should have a negative charge on the most electronegative atom (oxygen) and positive charges on the less electronegative atoms (phosphorus and iodine). Choice C has a -1 charge on the oxygen, a +2 charge on the phosphorus, and a +1 charge on the iodine, which is the most stable arrangement of formal charges.

Phosphoryl Iodide Is Used in the Preparation of Organophosphorus Derivatives