Sketch the Lewis structure of all trans-2,4,6-octatrienoic acid.
(a) Consider the delocalized π electrons. Employ the particle-in-a-box model. Drawing on your knowledge about the occupation of orbitals in atoms what is the highest occupied state? Sketch the occupation of the energy levels with electrons using ↑ and ↓.
I wondered if the electron lone pairs on the oxygen atoms also counted as π electrons since resonance structures exist where these lone pairs can be delocalised over the molecule.
If so, how would this correspond to using them to find the length of the conjugated system because wouldn’t that give extra length where there was no double bond?