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

The $C = C$ pi electrons of $C H_{3} CH = CH - CHO$ are pushed to make a new $C = C$ bond with the carbonyl carbon, while the $C = O$ bond is left as it is.

TestHub · Accepted Answer

The carbonyl carbon would carry a double bond to O and a new double bond to carbon, so five bonds in all. C-2 is violated.

Chemistry - GOC Question with Solution | TestHub

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