[Adamk]

http://www.converthub.com/working/done/3f204cc6df628d074cfae837d806bf1a/ochemproblem.jpg

I cant figure out if my Organic chemistry problem is correct or not could someone please look at it and let me know.

[discodermolide]

They all look OK apart from the first one which I think is like my drawing. The major contributor to the resonance forms is the structure on the right.

[Adamk]

Thank you very much, but Could you elaborate I am still a little confused as to what is wrong on part one?

[discodermolide]

I don't see the other structures being contributors to the resonance forms of this molecule.

[Adamk]

Oh ok thank you I understand now.

[orgopete]

They all look OK apart from the first one which I think is like my drawing. The major contributor to the resonance forms is the structure on the right.

Unfortunately, the poster deleted the linked question, so the answer could have been correct, but the structure on the left is normally the major resonance contributor as no formal charges are present, unlike the structure no the right.

For others, please embed schemes in the forum to preserve the integrity of the question.