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 formate ion $HCO O^{-}$ a lone pair on the $O^{-}$ is pushed to make a $C = O$ bond, while the existing $C = O$ bond is left as it is.

TestHub · Accepted Answer

The carbon would have two C = O double bonds and a C-H bond, five bonds in all. C-2 is violated.

Chemistry - GOC Question with Solution | TestHub