Talk:Carbonium ion

Carbonium = carbenium?

Some papers from the 1960s apparently use "carbonium" for molecules that have a trivalent carbon with a +1 charge, instead of a pentavalent one. That would be a carbenium ion, no? Did the nomenclature change? Or do people still use "carbonium" in that sense? --Jorge Stolfi (talk) 01:36, 15 February 2013 (UTC)[reply]

Oops, the answer is right there in carbenium ion, sorry. --Jorge Stolfi (talk) 01:38, 15 February 2013 (UTC)[reply]

There are true carbonium ions like methanium ion, but I don't agree that 2-norbornyl is a carbonium. You can draw a "classical" structure for 2-norbornyl (that's how it was so controversial -- Brown was convinced it was two equilibrating classical structures). You don't have to invoke sigma delocalization, although it turns out that 2-norbornyl is, in fact, sigma delocalized. For a true carbonium ion, there's just no way to draw a structure where a line represents two electrons without invoking a resonance form with no-bond (zero-order) bonds (try it for CH5+!) Alsosaid1987 (talk) 01:27, 13 December 2024 (UTC)[reply]

"Isobutanium" listed at Redirects for discussion

An editor has identified a potential problem with the redirect Isobutanium and has thus listed it for discussion. This discussion will occur at Wikipedia:Redirects for discussion/Log/2022 January 2#Isobutanium until a consensus is reached, and readers of this page are welcome to contribute to the discussion. ~~~~
User:1234qwer1234qwer4 (talk) 20:59, 2 January 2022 (UTC)[reply]