chemical shifts for protons in different electronic environments

methyl (R-CH3)

~0.9

methylene

~1.2

methine

~1.7

allylic

~2

alkynyl

~2.5

aromatic methyl

~2.5

alkyl halide

2-4

alcohol (R-O-H)

2-5

vinylic

4.5-6.5

aryl

6.4-8

aldehyde

~10

carboxylic acid

~12

ketone

2-2.5

ester

3.3-4.5

carbonyl

2-2.5

ether

~3.5