How count the carbons in 2,3,7,8-Tetrachlorodibenzo-p-dioxin?

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The discussion centers on the chemical structure of dioxin, particularly in light of a recent incident in Ohio. The main point of confusion is how to accurately count the carbon atoms in the dioxin compound, with participants noting different numbering conventions. One contributor highlights that while they would typically number the carbon atoms as 2, 3, 6, and 7 based on analogy with anthracene, the established numbering for dioxin assigns numbers 5 and 10 to the oxygen atoms instead of 9 and 10. This reflects a broader interest in understanding the chemical properties and implications of dioxin, especially in the context of environmental health and safety.
arabianights
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hi guys,

I did some reading into dioxin in light of recent incident in Ohio.
I'm not sure how to count the carbon in this compound, if i start counting from top left or top right, I comes with carbon 2, 3, 8, 9 that bounds with Chlorine atom.

https://www.epa.gov/dioxin/learn-about-dioxin
 
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