200 likes | 466 Views
Amines, Amides, & Amino Acids. Hydrocarbon Derivatives. Amines. Contain N General Format: R NH 2 NH 2 = amino group N has bonding capacity of 3 molecules contain H bonded to N = H bonding weaker than hydrogen bonding in alcohols and carboxylic acids Amines smell really, really bad.
E N D
Amines, Amides, & Amino Acids Hydrocarbon Derivatives
Amines • Contain N • General Format: RNH2 • NH2 = amino group • N has bonding capacity of 3 • molecules contain H bonded to N = H bonding • weaker than hydrogen bonding in alcohols and carboxylic acids • Amines smell really, really bad
R’ H H Table R • Shows format RNR” (this is a 3 amine) • 1 amines: RNH • 2 amines: RNR’
Naming Amines • Find name of base hydrocarbon • Drop final -e & add -amine • Use # in front of name to give location of amino group
H HH HCCNH H H Ethanamine H H HH HCCCNH H H H 1-propanamine
H H H NH HCCCH H H H < 2-propanamine CH2CH2CH2 1,3-propanediamine NH2 NH2
NH2 NH2 CHCH2CH2CH 1,1,4,4-butanetetraamine NH2 NH2
Examples of amines • PABA • Caffeine • Novacain • B-vitamins • Preparation of dyes
Amides • Contain: • carbonyl group (>C=O) & • amino group (NH2) • amino group bonded to C of carbonyl group • Links amino acids together
O R’ O = = Table R • General Format: RCNH2 or RCNH • carboxylic acid: RCOOH • replace the OH with NH2 • no # needed in name • Amide group is always at end of molecule
Naming Amides • Find name of alkane with same # of C’s • drop the final -e & replace it with -amide
H O = HCCNH2 Ethanamide H O = Propanamide CH3CH2CNH2
Properties of Amides • strong hydrogen bonding - so high bp • Simple amides are solids at room temp • Smaller amides are very soluble in water
Amino Acids • Only need to recognize them • Don’t need to know how to name them • Contain a carboxyl group (-COOH) • Contain an amine group (-NH2) • Amino group is on C next to carboxyl group
NH2 AminoAcids alanine O = CH3CC OH NH2 O glycine = CH2C OH