[Paabo]

Can anyone show me a picture of dimethylethylacetaldehyde? I can't find one in google, and when I try to draw it, it looks exactly like 3-3, dimethyl butenal.. I can't figure out what I'm doing wrong.

[ARGOS++]

Dear Paabo;

It sounds like a trivial-name for 2,2-Dimethylbutanal.   See number 23 on:
          http://www.che.ilstu.edu/class/chem233/Aldehydes-Liquids.html 
          (IlliniossState University)

It's not:

and when I try to draw it, it looks exactly like 3-3, dimethyl butenal.. I can't figure out what I'm doing wrong.

Good Luck!
                    ARGOS⁺⁺

[Paabo]

Ah, it appears I was too hasty when writing "3,3-dimethyl butanal", thanks for catching that. As for "dimethylethylacetaldehyde", I think 2,2-dimethylbutanal fits the description perfectly. I didn't think to move the methyl substituents. Thanks a lot, Argos!

[ARGOS++]

Dear Paabo;

You 're welcome!   ─   Soon again.

Good Luck!
                    ARGOS⁺⁺