Question

for the structure below, numbers are included to differentiate the atoms.
considering all valid resonance structures in which c and o atoms have a full octet, which atoms can hold a formal charge of - 1? (including the structure drawn). select all that apply.
hint: remember the arrow patterns you can use for drawing resonance structures.
c - 1
c - 2
o - 3
c - 4
c - 5
c - 6
c - 7

Explanation:

To determine which atoms can hold a formal charge of - 1, we need to consider resonance structures.

• For the given structure, in the initial structure, \(C - 6\) has a formal charge of - 1.
• Using the arrow - pushing for resonance:
• If we move the electron pair from the \(C = O\) double bond (between \(C - 2\) and \(O - 3\)) towards \(O - 3\) and move the electron pair from the \(C = C\) double bond (between \(C - 4\) and \(C - 5\)) towards \(C - 4\), we can get a resonance structure where \(O - 3\) has a formal charge of - 1.

Answer:

O - 3, C - 6