Hi everybody, 1. The problem statement, all variables and given/known data I am working on the spectra from the following link: http://www.chem.ucla.edu/cgi-bin/webspectra.cgi?Problem=bp2 2. Relevant factors and first attempt For the most part, I understand how the spectra available contribute to the answer, but the left (upfield) side of the proton NMR is proving confusing. I see how the methyl group around 4ppm and the lone aldehyde hydrogen around 10.5 ppm produce their respective patterns, but the remaining 4 hydrogens on the left side of the benzene ring mystify me. To be more specific in my confusion: 3. The confusion 1. Why does the 7.0 ppm shift have a multiplicity of two? Given that each hydrogen is a different distance from the either and aldehyde, shouldn't each hydrogen have a different peak? 2. What could account for the two-multiplicty 4-peak split between 6.9-7.0 ppm? Since this is a benzene ring, each hydrogen should be adjacent to a maximum of two hydrogens, no? One on each carbon on each side of the bond? I understand the other two shifts within the 7-8 ppm range, but not how they might fit in with the one above. What am I not seeing? Thanks for your help.