Fischer Projection Exception?

[wired202808]

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When you have a Carbonyl or carboxylic acid attached as one consituent on a Fischer projection, does that take priority over a C-C bond? I thought it did but it seems like its not the case.

What do you guys think?

 

[LetsGo2DSchool]

It should take priority unless something else is going on. Can you show a diagram?