Naming Amines and Amides (Rules)

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Chem 30B - Naming Amines and Amides (Rules) Amines and amides come from ammonia (replacing the H’s). Classification of amines by the number of alkyl chains: Naming Simple Amines (Common Names) • Are named as alkylamines. • List the names of the alkyl groups bonded to the N atom in alphabetical order in front of amine. CH3 CH3—CH2—NH2 CH3—NH—CH3 | ethylamine dimethylamine CH3—N—CH2—CH3 ethyldimethylamine Name the following amines: IUPAC Names of Amines • Amines are named as alkanamines. • The –e in the alkane name of the longest chain is changed to –amine. NH2 • The chain is numbered to locate the amine group and substituents. | CH3—CH2—NH2 CH3—CH—CH3 ethanamine 2-propanamine In a secondary or tertiary amine, • The longest alkane chain is numbered. • Each alkyl group bonded to the N atom is named as a N-alkyl group HN—CH3 | CH3—CH2—CH2—NH—CH3 CH3—CH—CH2—CH3 3 2 1 1 2 3 4 N-Methyl-1-propanamine N-Methyl-2-butanamine Name the following amines: Amines as Branches • When found in compounds with oxygen containing functional group: • -NH2 amino • -NHR N-alkylamino • -NR2 N,N-dialkylamino Name the following amine: Free to copy for educational purposes Ammonium Salts • Named by naming the positive ion first and then naming the negative ion. • Pharmaceutical companies often name amine salts by naming the parent amine followed by the name of the acid used to synthesize the salt: • HCl: amine hydrochlorides • H2SO4: amine hydrogen sulfates Amides Classification of amides by the number of alkyl chains: Amides are named as alkanamides. • IUPAC replaces –oic acid ending with –amide. • Common names replace -ic acid ending with –amide. O O || Methanamide (IUPAC) || Propanamide (IUPAC) H—C—NH2 Formamide (common) CH3—CH2—C—NH2 Propionamide (common) • An alkyl group bonded to the N atom is named as N-alkyl in front of the amide name. O H O H || │ || │ CH3 —C—N—CH3 CH3—CH2 —C—N—CH2—CH3 N-methylethanamide (IUPAC) N-ethylpropanamide (IUPAC) N-methylacetamide (common) N-ethylpropionamide (common) • The amide of benzene is named benzamide. Free to copy for educational purposes Naming Amines and Amides Key (Rules) Name the following amines (common names): Name the following amines (IUPAC names): Name the following amine: Free to copy for educational purposes .

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