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Number of rings
editFrom the picture, it appears to have 7 rings, but one editor changed this to 6. How is this? I suppose you could say that some of the rings only have one double bond, not three, but eliminating these rings would give a total count of 4. Is the ring in the center excluded for some reason?--24.16.148.75 04:09, 9 July 2006 (UTC)
- It says: "six ortho-fused benzene rings" and that is correct. It is more an instruction ("take six rings, fuse them, get coronene"). Obviously the resulting compound has seven rings. Cacycle 12:56, 9 July 2006 (UTC)
- The resulting compound has an apparent seventh ring but that is more visual ilusion. If you examine the bonds, the central "ring" is not aromatic. The topology is six rings of benzene, with the seventh ring as more ilusion than real..rather like arranging six hexagonal tiles so that it appears there is a seventh hexagon between them. --EncycloPetey (talk) 13:38, 6 October 2009 (UTC)
Add a ring to get benzo[a]coronene, C28H14, right? This is isomeric to benzo[pqr]naphtho[8,1,2-bcd]perylene or a number of other obviously eight-ring PAHs. Fetz the Chemist 18:06 22 September 2008 (UTC)
Presence in Titan
editAccording to the article about Titan, what was once thought to be surface condensations of PAH now seems to be something else. Is there coronene in Titan? And how does it cause DNA damage in mammals (and why not in other organisms)? Thanks Abedul69 12:52, 17 May 2007 (UTC)
A use for coronene
editA use for coronene is scintillation in the blue part of the visible spectrum when illuminated by UV light. Heating a sample of coronene to a little over 200C in a vacuum causes it to sublimate and deposit on cooler objects inside the vacuum chamber (thermal PVD). A CCD photosensor can get a layer of coronene several hundred angstroms thick. This is not thick enough to block visible light to a significant degree, but will fool the CCD into thinking it can see UV light. A spectrometer made with such a coated CCD will have an extended useful spectrum.
Norm Glitz, who does this for a living in www.piacton.com —Preceding unsigned comment added by 65.119.194.193 (talk) 14:38, 5 September 2007 (UTC)
- For clarity, I inserted the heading A use for coronene above the preceding comment. (And @Norm: Wow! Can I do that to my camera? ;-) ) yoyo (talk) 17:08, 25 May 2010 (UTC)
Production of coronene
editIn hydrocrackers, it is a major product “The Production of Large Polycyclic Aromatic Hydrocarbons During Catalytic Hydrocracking”, J. C. Fetzer, “Catalysts in Petroleum and Petrochemical Processing 1995”, M. Absi-Halabi, J. Besharah, H. Qabazard, and A. Stanislaus (eds.), Elsevier (1996) p. 263-271
It is also made naturally in hydrothermal vent regions “High Molecular Weight Polycyclic Aromatic Hydrocarbons in Hydrothermal Petroleums from the Gulf of California and Northeast Pacific Ocean”, B. R. T. Simoneit and J. C. Fetzer, Org. Geochem., 24 1065-1077 (1996) — Preceding unsigned comment added by Fetz the chemist (talk • contribs) 21:11, 12 February 2011 (UTC)
External links modified
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Superbenzene
editA number of other molecules are also referred to as superbenzene: