The molecule you've been drawing wrong this whole time | Resonance

This is the acetate ion, what is left of vinegar after it gives up a proton. Chemists draw it two ways, with the negative charge on one oxygen or the other. Here is the strange part: both drawings are wrong. The real ion is a single fixed blend of both at once, the resonance hybrid. We build resonance from the ground up. What a curved arrow actually means (electrons move, atoms never do). How to score a drawing with formal charge, derived not asserted. And the three rules that decide which drawing matters most, the major contributor: full octets win, fewer formal charges win, and a charge sits best on the atom that wants it, the more electronegative one for a negative charge. Then the hard case every student trips on: a positive charge stuck on carbon. A carbocation carbon has only six electrons, so it is electron hungry, and its neighbors feed it density two ways at once, hyperconjugation and the inductive effect. That is why a tertiary carbocation beats a secondary, which beats a primary. The payoff: spreading electrons across more atoms lowers a molecule's energy. Resonance is not bookkeeping on paper. For ions like acetate, it is the reason they are stable enough to exist at all. Chapters: 0:00 Two drawings, both wrong 0:16 The resonance hybrid 0:43 Curved arrows move electrons 1:04 Formal charge 1:42 Major vs minor contributors 2:05 Rule 1: full octets 2:23 Rule 2: fewer charges 2:40 Rule 3: charge placement 3:09 The carbocation hard case 3:56 Why spreading electrons wins Music by Vincent Rubinetti Download the music on Bandcamp: https://vincerubinetti.bandcamp.com Stream the music on Spotify: https://open.spotify.com/artist/2SRhE... #organicchemistry #chemistry #resonance #carbocation