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As I understand, if a molecule is cyclic and planar, then every atom in the ring must be $\ce{sp^2}$-hybridized and the molecule must have [4n+2] π electrons, where n∈N (Hückel’s rule).

An article in Chemistry World by Sam Howell ("New rule predicts stabilising aromaticity in open-shell metal clusters", 21 MAY 2019), talks about jellium aromaticity.

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image source : https://www.chemistryworld.com/news/new-rule-predicts-stabilising-aromaticity-in-open-shell-metal-clusters/3010515.article

My question is what is jellium aromaticity?

Does it have anything to do with Hückel's rule?

Chakravarthy Kalyan
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  • Helpful: https://www.ncbi.nlm.nih.gov/pubmed/30997449 – user79161 May 23 '19 at 08:05
  • @user79161 this link leads to abstract and a paywall.Further it talks about spherical aromaticity. Now that – Chakravarthy Kalyan May 23 '19 at 08:14
  • @user79161 Sperical aromaticity ??? That will wartent a seperate question. – Chakravarthy Kalyan May 23 '19 at 08:16
  • I can't help with the paywall in any legal way, I'm afraid. Secondly, it pertains to jellium aromaticity as analogy to spherical one, as you noted. Thirdly, I regret you didn't find it helpful. – user79161 May 23 '19 at 08:33
  • I didn't mean they're analogous. The paper deals with them in that way. I suppose we can get to an answer if we try to understand what we are typing here, for starters. Besides, how much information do you expect out of a 3-page paper. The link says helpful, not answer. – user79161 May 23 '19 at 09:06
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    As a comment I can say that aromaticity is used to mean an extra stability. For starting refer to Hirsch aromaticity in Wikipedia – Alchimista May 23 '19 at 10:57
  • Please note that atoms cannot be hybridised in the sloppy way it is said "sp²-hybridised atom"; this usually implies that an atom has sp² orbitals, or is trigonally coordinated. In any case, the continuous loop of orbitals is more important. Also, while all Hückel aromats are aromatic, not all aromats obey Hückel's rules. – Martin - マーチン May 23 '19 at 14:21

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