The following table shows the ranges in which the NMR signals appear for different types of hydrogens.


♦ Hydrogens located on aliphatic chains present values of $\delta$ close to 1. They increase slightly when going from primary to secondary or tertiary carbons.

♦ Allylic hydrogens are located between 1.5 and 2.1.

♦ Alpha hydrogens with respect to carbonyls and acid derivatives are between 2 and 2.5.

♦ The benzylic hydrogens between 2.3 and 2.7.

♦ The hydrogen of terminal alkynes between 2.5 and 3.

♦ Hydrogens attached to carbons with halogens between 2.5 and 4 depending on the electronegativity of the halogen

♦ The hydrogens of the hydroxyl group between 2.5 and 5. Very wide range due to the formation of hydrogen bonds.

♦ Hydrogens with ether-type oxygen bonded carbons between 3.3 and 4.5.

♦ Olefinic hydrogens between 3.5 and 6.5.

♦ Hydrogens bound to aromatic systems between 6.5 and 8.

♦ Hydrogen from aldehydes 9.5-10

♦ Hydrogen from carboxylic acid group above 11.