Problem- Given the NMR spectrum of isobutyl acetate, match the different types of protons with the correct chemical shifts.
methyl protons next to carbonyl 1. ? = 1.0 ppm
methylene protons next to O 2. ? = 2.0 ppm
methine proton in isobutyl group 3. ? = 2.3 ppm
terminal methyl protons in isobutyl group 4. ? = 3.9 ppm
Please take care to reply the question as mark are evenly granted for each point