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What would this aromatic boron compound be called?

enter image description here

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    $\begingroup$ Label the atoms. $\endgroup$
    – user38977
    Commented May 14, 2017 at 16:28
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    $\begingroup$ Is this 1H-Borepin $\endgroup$
    – Mesentery
    Commented May 14, 2017 at 16:41
  • $\begingroup$ @blue I used CPK coloring code for atoms. See en.wikipedia.org/wiki/CPK_coloring $\endgroup$ Commented May 15, 2017 at 0:45
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    $\begingroup$ @PrittBalagopal You should mention that in your question to avoid confusion. I wasn't sure what colouring scheme you were using. $\endgroup$
    – user38977
    Commented May 15, 2017 at 1:04

2 Answers 2

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According to the current version of Nomenclature of Organic Chemistry – IUPAC Recommendations and Preferred Names 2013 (Blue Book), heteromonocyclic compounds with up to and including ten ring members are named by the extended Hantzsch–Widman system. According to P-68.1.1.3.2, this also applies to heterocyclic parent hydrides containing Group 13 (boron group) atoms.

The Hantzsch-Widman system stem for an unsatured 7-membered ring is “epine”. Therefore, the preferred name for the compound that is given in the question is 1​H-borepine.
The name 1​H-1-boracyclohepta-2,4,6-triene is not recommended.

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    $\begingroup$ Unsaturated or fully conjugated 7-member ring? Do we use epine for the cycloalkene formulated C7H12? $\endgroup$ Commented May 14, 2017 at 17:48
  • $\begingroup$ @OscarLanzi H-W system is for heterocycles, not alkenes. $\endgroup$
    – Mithoron
    Commented May 17, 2017 at 23:01
  • $\begingroup$ Then presumably the words "fully conjugated" should be used instead of "unsaturated". $\endgroup$ Commented May 17, 2017 at 23:14
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If the black coloured are carbon atoms and the white coloured are hydrogen atoms, and the pink one is Boron. Then it should be 1H-Borepine.

enter image description here [Source: Chemspider]

See here for why it is aromatic.

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    $\begingroup$ There is a standard color code for ball and stick models. True, carbon = black, hydrogen = white, boron = that pretty pink color. Some others : oxygen = red, nitrogen = blue, chlorine = yellowish green like the gas. $\endgroup$ Commented May 14, 2017 at 17:41
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    $\begingroup$ @Mesentery Thanks for your answer. There is in fact a color code for atoms. See en.wikipedia.org/wiki/CPK_coloring $\endgroup$ Commented May 15, 2017 at 0:42

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