2.2.11 Resonance Structures

what are delocalised electrons

electrons in a molecule, ion or metal that are not associated with one atom or one covalent bond

when do resonance structures exist

when there is more than one possible lewis structure that can be drawn for the position of a multiple bond

what is the bond length and strength in a resonance structure

intermediate in length and strength between a double and triple bond

what is the actual structure of the combination of all resonance structures known as

resonance hybrid

what must a molecule have to form a resonance hybrid strucutre

a double bond ( a pi bond) capable of migrating from one part to another

when 2 occasions does this usually arise

when adjacent atoms with equal electronegativity (same atoms)
lone pair of electrons can re arrange themselves

draw the lewis resonance structures of carbonate ion and resonance hybrid

how does the resonance structure of carbonate ion arise

the c=o bond is in a different position becuase the lone pair of electrons on the oxygen atom overlap with the pi electrons from the c=o bond and so 4 pi electrons are shared

draw the lewis resonance structures and resonance hybrid of ozone

draw the resonance structure of the carboxylate ion