C-1 : never break a single bond while drawing a resonance structure. C-2 : never exceed the octet of a second-period atom (C, N, O). For the curved-arrow move described below, which statement is corre

Question

C-1 : never break a single bond while drawing a resonance structure.

C-2 : never exceed the octet of a second-period atom (C, N, O).

For the curved-arrow move described below, which statement is correct ?

structure

In the allyl anion the lone pair on carbon is pushed to make a $C = C$ bond with the neighbouring carbon, and the $C = C$ pi pair is pushed onto the terminal carbon.

TestHub · Accepted Answer

The lone pair forms a new pi bond while the old pi pair leaves the middle carbon. No octet is exceeded and no single bond is broken. No violation.

Chemistry - GOC Question with Solution | TestHub

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