Which of the following compounds present exceptions to the octet rule ?

Which of the following compounds present exceptions to the octet rule ?





a) SeF2








b) PCl3O








c) CN−








d) ClO4-








e) SO3-2

Which of the following compounds present exceptions to the octet rule ?
PCL30
Reply:B, D, and E





B. there will be a double bond with the oxygen and the three Cl molecules bonded to the P making 5 total bonds





D. There will resonance in this structure and again will have more than 4 bonds. I think there will be 7.





E. This will have a S with 3 O atoms attached to it. However two of the O groups will be double bonded and one will be a single bond creating 5 bonds.
Reply:b, d and e.

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