NMR spectroscopy – determine molecule structure
δ chemical shift ppm (from TMS): difference in frequency absorbed – due to molecular environment
nucleus has odd number of nucleons = nuclear spin = creates weak magnetic field
spectroscopy measures radio wave absorption when molecule in external magnetic field
o different environment (peak) = absorbs different amount of energy at different frequencies
o determined by groups of atoms near nucleus
δ chemical shift ppm (from TMS): difference in frequency absorbed – due to molecular environment
nucleus has odd number of nucleons = nuclear spin = creates weak magnetic field
spectroscopy measures radio wave absorption when molecule in external magnetic field
o different environment (peak) = absorbs different amount of energy at different frequencies
o determined by groups of atoms near nucleus
