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normal (1-2 ppm)
alkyl (methyl, methylene, methine)
weak (2-3 ppm)
allylic (triple bond and aromatic methyl)
strong (3-4 ppm)
halogens (alkyl halide, alcohol)
vinyl (5-6 ppm)
vinylic
aromatic (7-8 ppm)
aryl, aldehyde, carboxylic acid