Structure of Amines H CH3 CH2CH3 Nitrogen is sp3 hybridized with a lone pair of electrons in an sp3 orbital. NCH3 H3C H107 CH3 108 ammonia trimethylamine electrostatic potential map of trimethylamine Chapter 19 11 Chapter 19 11 Structure of Amines Nitrogen is sp3 hybridized with a lone pair of electrons in an sp3 orbital. =>