Need some help for lab chem 3b

<p>the nmr C spectra of chlorobenzaldehyde!
I'm confused which would be the C-Cl peak and the aldehyde peak</p>

<p>The aldehyde peak is the most downfield, since the C=O group is one of the most deshielding R-groups there is.</p>

<p>alright cool. that's what i originally had, but my friend was telling me otherwise</p>