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I followed this link from "para-" on the disambiguation page, expecting to find information on the prefix meanin "Beside; near; alongside". Why is it linked to a rather involved page on chemistry? —Preceding unsigned comment added by 88.105.81.182 ( talk) 19:19, 20 November 2007 (UTC)
Having completely failed to mentally grasp those images, I roamed the Intertubes until I found this:
Particularly the main image at the top of that page helped the penny to finally drop: image
Drawn differently, I finally grasped that the blue arrow thing implies a second instance of R (designated R').
But then there's more:
Peri-substitution occurs in naphthalenes for substituents at the 1 and 8 positions.
I can find no reference that documents carbon position 8. When I count cyclodecane myself, by the obvious approach of crawling around the outside like an ant, the positions illustrated come out as 1 and 9 (with final position 10 in between).
The following rather imposing document does not illustrate how to enumerate the carbons in cyclodecane.
Nor was I able to find such an enumeration in any obvious Wikipedia page concerning cyclic carbon chemistry or formal naming systems.
More work required. — MaxEnt 16:00, 23 June 2020 (UTC)
![]() | This ![]() It is of interest to the following WikiProjects: | ||||||||||
|
I followed this link from "para-" on the disambiguation page, expecting to find information on the prefix meanin "Beside; near; alongside". Why is it linked to a rather involved page on chemistry? —Preceding unsigned comment added by 88.105.81.182 ( talk) 19:19, 20 November 2007 (UTC)
Having completely failed to mentally grasp those images, I roamed the Intertubes until I found this:
Particularly the main image at the top of that page helped the penny to finally drop: image
Drawn differently, I finally grasped that the blue arrow thing implies a second instance of R (designated R').
But then there's more:
Peri-substitution occurs in naphthalenes for substituents at the 1 and 8 positions.
I can find no reference that documents carbon position 8. When I count cyclodecane myself, by the obvious approach of crawling around the outside like an ant, the positions illustrated come out as 1 and 9 (with final position 10 in between).
The following rather imposing document does not illustrate how to enumerate the carbons in cyclodecane.
Nor was I able to find such an enumeration in any obvious Wikipedia page concerning cyclic carbon chemistry or formal naming systems.
More work required. — MaxEnt 16:00, 23 June 2020 (UTC)