Understanding OCH- Lewis Structures

[icystrike]

Homework Statement

Assign formal charges to the possible lewis structures of the following and decide which structure is the most important:

$$OCH^{-}$$

Homework Equations

The Attempt at a Solution

Most important

I'm wondering how can i come up with all possiblities..

 

[Gokul43201]

Which is more electronegative: O or N?

Try varying the bond order between the atoms. Also, the question talks about OCH-, but that is presumably a typo. Clarify.

 

[icystrike]

O is more electronegative and O deserves the negative charge. Yup i got that (OCH)-1