Talk:Azulene

Density of Azulene
Can someone please find and list the density of azulene? Kryptid 66.82.9.49 22:22, 24 March 2007 (UTC)
 * I would guess 1.1 g/mL. -lysdexia 02:06, 1 October 2006 (UTC)
 * The method of Le Bas gives 1.15 g/mL of the liquid at the normal boiling point. Stieltjes (talk) 19:59, 19 June 2012 (UTC)

Azulene comes from the spanish word "Azul"?
"Azul" is a portuguese word also, and is present in almost all latin languages to mean a dark blue. In italian is "Azzurro", in catalan/occitan/french "Azur", all having the root in latin, which hat two spellings: "Azzurum" or "Azureus". Is there any reference that says that Azulene comes from spanish "Azul"? —Preceding unsigned comment added by 193.54.238.42 (talk) 08:49, 28 June 2010 (UTC)

0.02 what?
I find only a number, no unit. m/m%? Not. g/l probably. Alfa-ketosav (talk) 16:36, 24 June 2018 (UTC)

Systematic name
The systematic name ends with -pentaene, but should the "a" not be elided to form -pentene? BrightSunMan (talk) 11:45, 23 August 2022 (UTC)


 * Systematic names can be a bit of a minefield but Chemspider confirms the name in the article is correct (although no chemist I know would use it). Wikipedia has to use such reliable sources Mike Turnbull (talk) 21:03, 23 August 2022 (UTC)

Azulene in the News
https://scitechdaily.com/violating-the-universal-kashas-rule-scientists-uncover-secrets-of-a-mysterious-blue-molecule/

Just throwing this out there for anybody who wants to do something with it and knows what they are doing better than I do. — Preceding unsigned comment added by 66.244.107.237 (talk) 09:05, 24 September 2023 (UTC)
 * Original article in JACS is 10.1021/jacs.3c07625 and open-access. I'd like to see a better WP:SECONDARY source before this is incorporated here (by someone more competent than me in the physical chemistry/spectroscopy). See also Kasha's rule: the fact of azulene's violating that rule has been known since at least 1999 and is already mentioned in our article. Mike Turnbull (talk) 13:44, 24 September 2023 (UTC)

To add to article
Basic information to add to this article: what this compound smells like. If it's aromatic, exactly which aromas does it have? 98.123.38.211 (talk) 23:30, 11 April 2024 (UTC)


 * IP editor. According to this reference it "emits an odor resembling mothballs". That's not surprising if they mean the compound naphthalene, which also has two rings and the same C10H8 molecular formula (i.e. they are isomers). As our article aromatic compound makes clear, chemists now use the word "aromatic" with a specific more technical meaning: not all aromatic compounds have much aroma and of course people experience aromas in different ways, for example when describing a fine wine. Mike Turnbull (talk) 10:46, 12 April 2024 (UTC)