1 / 12

Chapter 18 Amines and Amides

Chapter 18 Amines and Amides. 18.2 Properties of Amines. Boiling Points of Amines, Alcohols, and Alkanes. The boiling points of amines are higher than alkanes of similar mass lower than alcohols of similar mass. Hydrogen Bonding in Amines. The polar N — H bond

Download Presentation

Chapter 18 Amines and Amides

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Chapter 18 Amines and Amides 18.2Properties of Amines

  2. Boiling Points of Amines, Alcohols, and Alkanes The boiling points of amines are • higher than alkanes of similar mass • lower than alcohols of similar mass

  3. Hydrogen Bonding in Amines The polar N—H bond • provides hydrogen bonding in 1° and 2° amines but not 3° amines • is not as polar as the —OH in alcohols

  4. Solubility in Water Amines are soluble in water • if they have 1 to 5 carbon atoms • because the N atom in smaller amines forms hydrogen bonds with the polar O—H bond in water

  5. Learning Check Consider the following compounds: 1) CH3—CH2—CH2—NH2 2) CH3—CH2—NH—CH3 3) CH3—CH2—CH2—CH3 A. Which compound has the highest boiling point? B. Which compound(s) is (are) soluble in water?

  6. Solution Consider the following compounds: 1) CH3—CH2—CH2—NH2 2) CH3—CH2—NH—CH3 3) CH3—CH2—CH2—CH3 A. Which compound has the highest boiling point? 1) CH3—CH2—CH2—NH2 B. Which compound(s) is(are) soluble in water? 1) CH3—CH2—CH2—NH2 2) CH3—CH2—NH—CH3

  7. Amines React as Bases Amines are • Brønsted-Lowry bases that attract a H+ from H2O to the N atom • weak bases in water

  8. Neutralization Forms Amine Salts An amine salt • forms when an amine is neutralized by an acid • is named by replacing the amine part of the name with ammonium followed by the name of the negative ion

  9. Properties of Amine Salts Amine salts are • solids at room temperature • soluble in water and body fluids • the form used for drugs

  10. Cocaine Cocaine • is sold illegally as an amine salt • is reacted with NaOH to produce the free amine form known as “crack”

  11. Learning Check Write the equation for ethylamine when it reacts with each of the following: A. H2O B. HCl

  12. Solution Write the equation for ethylamine when it reacts with each of the following: A. B.

More Related