# Why are amines Lewis bases?

May 9, 2018

Lewis' theory of bases and acids says that:

• Acids are lone pair acceptors
• Bases are lone pair donors.

A base doesn't lose its lone pair, but shares it, like a dative covalent bond.

An amine has a nitrogen atom connected to three alkyl groups, while also having a lone pair of electrons:
$: {\text{NR"_1"R"_2"R}}_{3}$, with ${\text{R"_1, "R}}_{2}$ and ${\text{R}}_{3}$ being the alkyl groups and $:$ being the lone pair of electrons.

These lone pair of electrons can bond to another molecule by filling a space in an empty orbital.