Comment on iykyk
hellfire103@lemmy.ca 6 days agoAh, my chemistry department taught me the other way around. I distinctly remember the phrase “methyl-ethyl” being thrown around a bit. Additionaly, we were taught to be more specific about isomers, hence me using butan-2-yl instead of isobutyl.
Then again, scientists often disagree strongly about things like this, so we could both be right. Also, there’s a good chance this is just the A-Level specification being weird. I left my old textbook at my student flat, though, so I won’t be able to check for a couple of weeks.
I could also be downright wrong myself.
As for the hydrogens, I had assumed they were not present, and that this lossane molecule is an ion with a charge of -50. This is borderline impossible to achieve in real life, of course.
sga@lemmy.world 6 days ago
Now i remember we also had to specify what isobutyl (technically just 1 isobutyl exists (not counting stereoisomers), and other form would be tertbutyl). But giving highest priority and minimising sum were definitely something we were taught.
I was free enough to look it up this time - IUPAC guidelines for organic chem - iupac.org/…/Organic-Brief-Guide-brochure_v1.1_Jun… (or more generally iupac.org/what-we-do/nomenclature/brief-guides/)
Section 7 © Lowest locant(s) for principal characteristic group(s)
Although I also remember just as we completed our unit on nomenclature, all we got was “common names”, now i was supposed to know of the top of my head what a cumene is (which I think is isopropyl benzene (not going to check this one)). Same thing happened with polymers, we were taught IUPAC, and then again, “industrial names”