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I'm currently doing a-levels chemistry and came across a question asking if all 17 carbon atoms in cyclic rings of a cholesterol molecule lie on the same plane. I've done some googling and it turns out that they do not lie on the same plane, but I could not find an explanation for this. Could anyone provide an explanation?

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  • $\begingroup$ It's rather opposite, atoms aren't in the same plane unless there's a good reason for that. $\endgroup$
    – Mithoron
    Nov 13 '21 at 16:43
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    $\begingroup$ This isn't a bad reference. Some suspects are lower-energy conformations of the fused rings (cis- or trans-fused) as well as boat/chair energetic favorability. $\endgroup$
    – Todd Minehardt
    Nov 13 '21 at 16:43

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