How many different organic structures (from the pure theoretical viewpoint) are there with carbon and hydrogen atoms and atoms without hydrogen can be made with 5 carbon atoms only? Is there any way to count them all using Polya enumeration theory for "n" (hydro)carbonatoms? This is a follow up question from this Hydrocarbons with only 4 carbon atoms

  • $\begingroup$ ron was probably hooked to this earlier one, but for 4 C atoms it could be already considered too broad, and for 5 I wonder how it could be not. $\endgroup$
    – Mithoron
    Commented Oct 28, 2017 at 20:05
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    $\begingroup$ Isn't this fundamentally a maths question? $\endgroup$
    – Beerhunter
    Commented Oct 28, 2017 at 20:56
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    $\begingroup$ This is simpler version of your question, then: chemistry.stackexchange.com/questions/16135/… $\endgroup$
    – Mithoron
    Commented Oct 28, 2017 at 21:11
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    $\begingroup$ chemistry.stackexchange.com/questions/33356/… $\endgroup$
    – Mithoron
    Commented Oct 28, 2017 at 21:13
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    $\begingroup$ BTW, spiropentadiene, or bowtiediene [no, I did not make up that name], C5H4, was first synthesized in 1991 and is highly unstable. $\endgroup$ Commented Oct 29, 2017 at 1:50


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